July 2025 Discussion-OBS - seasonable summer variability

[psv88]

0.02 today.

[Intensewind002]

Only a couple drops here on the south shore 

[donsutherland1]

JFK Airport (31 days) and Newark (31 days) have tied their July records for most 80F (26.7C) or above days. JFK Airport (2 consecutive years) and Newark (4 consecutive years) have their longest streaks of 31 80F (26.7C) or above July days. Neither site had ever had 2 consecutive such years before their current streaks.

[donsutherland1]

Central Park (31 days) has tied its July record for most 80F (26.7C) or above days. In addition, July 2025 is the second consecutive July with 31 such days, which sets a new record for most consecutive years. The only other years were 1944, 2022 and 2024.

[bluewave]

13 hours ago, LibertyBell said:

well now that we know that Tampa can hit 100 degrees I guess we can too.

I read they just had their highest ever heat index of 113 too.

 

Tampa just set their highest heat index at 119°. SMQ reached 118° for the 1st time back in June.

This July at SMQ was the highest average max dew point at 74.2°. This is similar to July at RDU. So the Mid-Atlantic dew points have shifted north into our area.

JFK finished at the 2nd highest avg max dew point at 73.1° just behind the record of 74.1° in 2019. 
 

 

 

[SACRUS]

 

 

82 / 75 clouds to the NYS border.  A race to 90 will likely come up short, but may see some inland/southern areas.   Storms / heavy rain in local areas Thu PM - Fri Pm 2-4 in the heaviest slowest moving storms.   Cloudy / E/ENE flow keeps Friday in the 70s - similar to 6/27.  Onshore barrage E/ENE flow the next 4 - 6 days jeeps  it near / below normal with 90s capped.  Weekend is nice overall 8/2-8/3.  By the 8th flow comes around more south as the atlantic ridge builds in with a warm - hot / humid and wetter overall returning towards the 9th.  Heat expanding from the west - eastward.

7/31:  Hot/ Humid - storms
8/1 :  Cool / cloudy (70s) Onshore
8/2 - 8/8:  Onshore barrage - normal / below normal 
8/9 - beyond :  Warm - hot / humid  wetter overall

 

[donsutherland1]

Yesterday's low temperature of 80° at JFK Airport broke the daily mark of 79°. The old record was set in 1995 and tied in 2006. It was the second such low this year, which tied the all-time record of two days set in 1999 and tied in 2016. 

[jm1220]

Not many clouds here. Many of us will make a run at 90 again until it clouds up. 

[SACRUS]

 

Records:

Highs:

EWR: 103 (1954)
NYC: 102 (1933)
LGA: 97 (1954)
JFK: 95 (2002)

Lows:

EWR: 56 (1932)
NYC: 57 (1914)
LGA: 62 (1956)
JFK: 58 (1964)


Historical:
 

1715: Spanish treasure ships, returning from the New World to Spain, encountered a hurricane during the early morning hours on this day. Eleven of the twelve ships were lost near present-day Vero Beach, Florida. 

 

1769: Hail fell 12 inches deep and lasted for 30 hours at Scituate, MA. (Ref. Wilson Wx. History)

1861: Cherrapunji, India set a world monthly rainfall record with a total of 366.14 inches. Cherrapunji also holds the world record rainfall for a 12-month period: 1,041.78 inches from August 1, 1860 to July 31, 1861. (Ref. Wilson Wx. History)

1891: A six day streak with high temperatures at or above 110° finally came to an end at Fresno, CA. This is their longest such streak on record. (Ref. Wilson Wx. History)

1906: Everyday this month at Bakersfield, CA the high temperature was at or above 100°. This is the only month on record where that occurred there. (Ref. Wilson Wx. History)

1931: Fresno, CA reached triple digit highs 28 days during the month. This tied a record for the most 100 degree plus days with July 1906. (Ref. Wilson Wx. History)

1936: A tropical storm moved in from the Bahamas and crossed extreme south Florida into the Gulf of Mexico. The storm strengthened into a hurricane and made landfall near Ft. Walton Beach, FL early on this date. Winds gusted to 125 mph and storm surge reached 6 feet. Four people died. (Ref. Wilson Wx. History)

1945: Richmond, Virginia had 18.21 inches during July the highest monthly total rainfall on their records. (Ref. Richmond Weather Records - KRIC)


1949: Lightning struck a baseball field at Baker, Florida during a game. The shortstop and third baseman were killed instantly.

 

1971: Unusually cold air settled into the southern Plains. Low temperatures were 15 to 20 degrees below normal, ranging from the mid 40s in northeast Oklahoma, the lower 50s in central sections, and near 60 in the southwest. Oklahoma City recorded a low of 53°, their coldest temperature ever observed in July. (Ref. Wilson Wx. History)

 

 

1976 - A stationary thunderstorm produced more than ten inches of rain which funneled into the narrow Thompson River Canyon of northeastern Colorado. A wall of water six to eight feet high wreaked a twenty-five mile path of destruction from Estes Park to Loveland killing 156 persons. The flash flood caught campers, and caused extensive structural and highway damage. Ten miles of U.S. Highway 34 were totally destroyed as the river was twenty feet higher than normal at times. (David Ludlum) (The Weather Channel)

 

1980: Record heat continued across the middle of the country. Daily record highs included: Columbia, MO: 108°, Tulsa, OK: 108°, Oklahoma City, OK: 107° and Springfield, MO: 104°. Dodge City, KS recorded 22 days of 100° or higher, with 17 of those days in a row with temperatures of 102° or higher. This was the driest July of the 20th century across Oklahoma. The statewide average rainfall was less than a half an inch, with many locations receiving no rain. Along with the dry weather, it was very hot, with several high temperature records broken. An estimated 37 people died across Oklahoma due in part to the extreme heat. (Ref. Wilson Wx. History)

1981: Springfield, IL reported a total of 10.76 inches of rain during the month, establishing a July record. Much of the total was because of two major rainstorms during the month, one of which produced 3 inches of rain, and the other, 4.33 inches. (Ref. Wilson Wx. History)

1983: Oklahoma is typically hot and dry during the summer, but July 1983 was extremely dry. Only a trace of rain fell in Oklahoma City, making it their driest July on record. The driest months ever recorded in Oklahoma City were January 1986 and August 2000, when not even a trace of moisture fell. (Ref. Wilson Wx. History)
 

1986 - The temperature at Little Rock, AR, soared to 112 degrees to establish an all-time record high for that location. Morrilton, AR, hit 115 degrees, and daily highs for the month at that location averaged 102 degrees. (The Weather Channel)

1987 - The deadliest tornado in 75 years struck Edmonton, Alberta, killing 26 persons and injuring 200 others. The twister caused more than 75 million dollars damage along its nineteen mile path, leaving 400 families homeless. At the Evergreen Mobile Home Park, up to 200 of the 720 homes were flattened by the tornado. (The National Severe Storms Forecast Center)

1987 - Afternoon highs of 106 degrees at Aberdeen, SD, and 102 degrees at Ottumwa, IA, and Rapid City, SD, established records for the date. It marked the seventh straight day of 100 degree heat for Rapid City. Baltimore, MD, reported a record twenty-two days of 90 degree weather in July. Evening thunderstorms produced golf ball size hail at Lemmon, SD, and wind gusts to 80 mph at Beulah, ND. (The National Weather Summary) (Storm Data)

1988 - Twenty-one cities in the north central U.S. reported record high temperatures for the date, including Sioux City, IA, with a reading of 107 degrees. The reading of 105 degrees at Minneapolis, MN, was their hottest since 1936. Pierre and Chamberlain, SD, with highs of 108 degrees, were just one degree shy of the hot spot in the nation, Palm Springs, CA. (The National Weather Summary)

1989 - Overnight thunderstorms soaked eastern Kansas and western Missouri with heavy rain. Four and a half inches of rain was reported at Nevada, MO. Evening thunderstorms in Oklahoma produced wind gusts to 75 mph at Covington. Six cities in the north central U.S. reported record high temperatures for the date, including Williston, ND, with a reading of 105 degrees. (Storm Data) (The National Weather Summary)

1991: July became the wettest month ever with 17.46 inches of rain at Columbia, SC. The old record was 16.72 inches set in August 1949. (Ref. Wilson Wx. History)

1992: Boston, Massachusetts this year had no 90 °F or higher temperatures for the year. (Ref. NOAA Boston Weather Events) Flint, MI ended their coolest July on record, while Columbus, OH, Buffalo, NY and Williamsport, PA experienced their wettest. Columbus had a record 29 cloudy days and 17 days with thunderstorms during the month. (Ref. Wilson Wx. History)

1993: The 30.3 inches of rain that fell during the month at Worth County, Missouri was nearly equal to the amount of rainfall that the area would receive in an entire year. Record precipitation that occurred across a good portion of the mid-Mississippi valley during the summer fell as far east as parts of central Illinois. During the month of July, Canton reported 12.66 inches of rain and Peoria reported 10.15 inches, both setting a record for the month. Springfield's 9.46 inches was good enough for the 2nd wettest July on record. Sioux Falls airport received 7.86 inches. That ranks July 1993 as the third wettest July on record in Sioux Falls. The high total of July 1993 also contributed to the wettest summer (June, July & August) on record in Sioux Falls with 17.39 inches of rain. Crop growth was very slow, with corn and soybeans two weeks to one month behind their normal growth by the end of July in Iowa. Losses in the corn crop amounted to nearly $1.389 billion, losses in soybeans were around $941 million dollars and oat damage was about $26 million dollars. (Ref. Wilson Wx. History)

1994: Philadelphia, PA ended the month with 10.42 inches of rain, breaking the monthly record of 10.30 inches set in July 1919. (Ref. Wilson Wx. History)

1996: A major hailstorm struck Cheyenne, WY with hail reported up to 2.5 inches in diameter. Damage was estimated to be about $3.4 million dollars. (Ref. Wilson Wx. History)



2009: Hail to golf ball size pummeled Prairie Dog State Park near Norton, KS. The hail shattered windows in 60 vehicles and caused significant damage to 40 RVs/campers; park cabins were also damaged. Total damage was estimated to be $1 million. (Weather Guide Calendar with Phenomenal Weather Events 2011 Accord Pub. 2010, USA)

2010: The heat of July 2010 was brutal and relentless !! Tied for hottest month of all time in Washington (83.1 °F) and at BWI (81.5 °F) (Until 2011 see 2011 below) Positive monthly departures at all major airports: + 3.9 °F at DCA, +5.0 °F at BWI and +3.8 °F at IAD
Ref. July PRESTO Page 1 Richmond had its hottest July with an average temperature of 82.8 °F; the previous record was 82.4 °F set in 1993. The hottest month Richmond has ever felt was August of 1900 with a mean temperature of 82.9 °F which was only 0.1 °F higher. But this July was preceded by the hottest spring and hottest June on record. Richmond's average temperature for both June and July was the hottest on record at 82 °F. Norfolk also set a record for those two months at 81.6, according to the Weather Service.
(Ref. Richmond Weather Records - KRIC)July temperatures -- Richmond had 24 days 90 °F or higher and the 113 year record for July is 26 days in 1993. Richmond had 18 days 95 °F or higher setting a new 113 year record for July the most for any month on record.
Norfolk, VA had 13 days 95 °F or higher tying their record for July. Richmond had 7 days with 100 °F or higher and the previous 113 year record, the most for any month, was 6 days in July 1977 and 1963. The 105 °F record temperature on the 24th and 25th also ties the highest maximum temperature ever recorded in July in Richmond. The Airport had ten days in 2010 with the temperature 100 °F or more; the old record was nine set in 1954. Rainfall total of only 2.01 inches for June and July made it the driest June and July on record. (Ref. Richmond Times-Dispatch Newspaper Thursday, August 26, 2010)(Ref. Richmond Weather Records - KRIC)
DCA soared to a record 102 °F on the 7th and 101 °F on the 24th. BWI recorded record high temperatures on 4 days: 6th (105 °F), 7th (101 °F), 24th (101 °F) and 25th (100 °F) On the 6th, BWI soared to 105 °F; 2nd hottest day ever in Baltimore (107 °F, 7/10/36); at or above 100 °F at BWI on 5 days, most on record At or above 90 °F on 44 days in 2010 at DCA, most number of days through July on record. Ref. July PRESTO Page 1

2011: Hottest average monthly temperatures on record at all three major airports: 84.5 °F at DCA (+5.3 °F); 81.7 °F at BWI (+5.2 °F); and 81.0 °F (+5.3 °F) at IAD. On 22nd, BWI’s high of 106 °F was second highest temperature on record; IAD's record maximum of 105 °F was hottest temperature on record; DCA’s 104 °F on 30th tied for the 5th highest reading in Washington; Heat Index values reached 121 °F at DCA, 118 °F at BWI and 117 °F at IAD due to oppressive humidity. DCA recorded 7 days with minimums at or above 80 °F, including a record 4 consecutive days from 21st-25th BWI observed 4 days with highs at or above 100 °F ; 3 such occurrences at DCA and IAD DCA reported 25 days with highs at or above 90 °F; BWI and IAD, 24; setting records at all three locations
Ref. Taken from the Sterling Reporter Volume 10, Issue 3 National Weather Service Baltimore MD/Washington DC Forecast Office Summer 2011 Ref. July 2011 PRESTO Page 1

2017: The famously fiery national park 100 miles to the west set an unpleasant record in July with an average temperature of 107.4 degrees. That ranks as the hottest month ever measured in the Western Hemisphere, according to the National Weather Service. Christopher Burt thinks it might be a world record as well. The weather historian for Weather Underground said he only knows of one monthly average that’s higher — 107.44 degrees recorded in July 2014 at a military base in northern Saudi Arabia — but that measurement has been discredited because it apparently didn’t include overnight temperature readings. “So far nobody’s come up with another figure that’s higher than Death Valley’s,” Burt said. Andy Gorelow, a meteorologist with the National Weather Service in Las Vegas, said unusually hot conditions at night were largely responsible for the new monthly record in Death Valley. The average low at the park’s official weather station in Furnace Creek, California, was 95.1 in July, the warmest of any month on record by more than a full degree. The average high in Death Valley last month was 119.6 degrees. July 7 was the single hottest day, with a high of 127. The temperature never dropped below 89 all month. (Death Valley Just Had Its Hottest Month July 2017 Elizabeth Shogren NEWS Aug. 8, 2017) (The Actual Temperatures for the Hottest Month of July 2017)

 

[SACRUS]

 

 

7 minutes ago, jm1220 said:

Not many clouds here. Many of us will make a run at 90 again until it clouds up. 

 

inches closer slowly south

 

[SACRUS]

 

[donsutherland1]

Bridgeport has now reached 80° this morning. That is the 29th 80° or above day this month. That ties the July record of 29 days, which was set in 1966 and tied in 1994. 

[SACRUS]

 

9AM clouds pushing in slowly

EWR: 80
NYC: 83
LGA: 81
JFK: 82
New Brnswck: 83
TEB: 83

[donsutherland1]

White Plains has reached 80° or above for the 30th day this month. That ties the July mark of 30 days, which was set in 2022.

[bluewave]

This July was a continuation of the rural spots in NJ not dropping below 50°. Prior to the big increase of our summer temperatures in 2010, they would regularly have the monthly low temperature in the 40s. Before 1960 some spots would occasionally drop into the 30s. The lowest July temperatures have risen by around +10 since 1893 at spots like Charlotteburg Reservior, NJ. 
 

[Picard]

17 minutes ago, bluewave said:

This July was a continuation of the rural spots in NJ not dropping below 50°. Prior to the big increase of our summer temperatures in 2010, they would regularly have the monthly low temperature in the 40s. Before 1960 it was typical to get into the 30s in July. So the July lowest temperature has risen by around +12 since 1893.

I can't imagine lows bottoming in the 30s around here in July as a relatively normal thing.
Global warming is definitely in play here, but I wonder if it's also a heat island affect, even though we are further from the city areas, how much of an affect have we seen?
Also airborne pollutants trapping heat and not allowing it to radiate off (aside from CO2)
And higher dewpoints would likely correlate with less radiational cooling.

[winterwarlock]

Looks like 90 plus possible today

[SACRUS]

 

8 minutes ago, winterwarlock said:

Looks like 90 plus possible today

 

1000AM Roundup

JFK: 87
ISP: 86
New Brnswck: 85
TEB: 85
EWR: 85
NYC: 83
LGA: 81

[SACRUS]

 

[Sundog]

45 minutes ago, Picard said:

I can't imagine lows bottoming in the 30s around here in July as a relatively normal thing.
Global warming is definitely in play here, but I wonder if it's also a heat island affect, even though we are further from the city areas, how much of an affect have we seen?
Also airborne pollutants trapping heat and not allowing it to radiate off (aside from CO2)
And higher dewpoints would likely correlate with less radiational cooling.

At least regarding the airborne pollutants, they were much worse in the past compared to today. 

[SACRUS]

 

https://www.washingtonpost.com/weather/2025/07/31/record-humidity-july-maps/

[donsutherland1]

5 minutes ago, SACRUS said:

 

https://www.washingtonpost.com/weather/2025/07/31/record-humidity-july-maps/

Here's a gift link so that anyone can read the article: https://wapo.st/4mdOi2m

[jm1220]

Some 90s showing up in N Wantagh/Massapequa. 

[Brian5671]

1 minute ago, jm1220 said:

Some 90s showing up in N Wantagh/Massapequa. 

alot sunnier than expected...most places will overperform temp wise-also more fuel for storms later

[jm1220]

1 minute ago, Brian5671 said:

alot sunnier than expected...most places will overperform temp wise-also more fuel for storms later

NWS could’ve kept the heat advisory. JFK is 88/75/98 at 11am. Feels like a swamp outside. 

[Jersey Andrew]

7 minutes ago, donsutherland1 said:

Here's a gift link so that anyone can read the article: https://wapo.st/4mdOi2m

Thanks Don. I knew DC humidity was worse than anything I experienced growing up here in 1980s and 1990s. August will be a refreshing start but don’t know what second half will bring.

[lee59]

As warm as this month has been, it will be the first month this year that will be warmer than the same month last year, at Central Park. Of course Last year was a record warm year. Also this month will be warmer than last July by only a tenth or so.

[forkyfork]

ewr getting 30 90 degree days from june and july alone is impressive

[steve392]

85,feels humid but there is a cool breeze out of my east northeast.  Shortening days are making the shadows longer making it more comfortable outside again.  

 

I hope this rain gets my area good.  Everything is so dry. 

[bluewave]

The 79° dew point at Philly is tied for the highest ever at 11am.

Philadelphia   PTSUNNY   89  79