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Pittsburgh Summer? 2025


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NWS point and click centered at KPIT has lows at or above 70 every day through Monday. If that happens (I’ll bet it doesn’t), it’ll be the 7th occurrence on record of 9+ consecutive days with lows of 70+, first time at Pittsburgh International, first time since 1918, and the first time in June. Record is 12 in 1916.

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86F as of 9:51 am. It might slow down, but you have to think there's at least a chance of a 95F high today. The last official 95F reading was on September 4, 2018, although I do seem to recall some discussion about whether the sensor wasn't running a little hot at the time.

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1 hour ago, TimB said:

NWS point and click centered at KPIT has lows at or above 70 every day through Monday. If that happens (I’ll bet it doesn’t), it’ll be the 7th occurrence on record of 9+ consecutive days with lows of 70+, first time at Pittsburgh International, first time since 1918, and the first time in June. Record is 12 in 1916.

Making a late push on the monthly temperatures. I'm a little skeptical that lows would stay above 70F that entire stretch, especially with showers and thunderstorms becoming increasingly likely. Too easy to drop into the low 70s with rain-cooled air in the evening. At that point, only a few more degrees of overnight cooling gets you into the upper 60s. Taking the NWS point-click values for PIT would yield a final monthly mean of 73.1F. That's 11th warmest in the "official" threaded record but would be the warmest ever at PIT and warmest in the threaded record since 1943. The cold start to the month prevents us from making a run any higher than that. Personally, I suspect that forecast is a little overdone with the increasing rain chances, but we'll see. Definitely going to feel like summertime either way.

The warmest Junes at the current airport site are 1967 (73.0F), 1994 (72.9F), 2024 (72.8F) and 1991 (72.6F). The record is 75.9F in 1934, when observations were taken downtown.

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Yep, temps were forecasted pretty well, maybe a hair under, but not as off as last year’s June heat.  Dew points seemed lower than forecast as well, if only by a little.  Still very hot out there, but more Heat advisory than Extreme Heat warning.

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34 minutes ago, TimB said:

First time since 1885, 1887 and 1888 that Pittsburgh has gotten to 94 in 3 out of 4 consecutive Junes.

Interestingly, those June's lately have outperformed July and August with peak temperatures (last year all three hit 94, but still).  June has generally outperformed August these last few years.  More front loaded summers it seems.

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If this morning’s low of 74 holds, it’ll be the first time Pittsburgh International hasn’t dropped below 74 for three consecutive days, and the first in the threaded record since 1930. 

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2 hours ago, TheClimateChanger said:

Made it to 92 so far today. With clouds & scattered thundershowers, that’s probably as high as it will get today.

Did a surge to 93.  Might be the high today.  With rain coming, I don't think that 74 degree low holds.

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17 minutes ago, ChalkHillSnowNut said:

What were the monthly averages in April and May? Were they above or below normal? I know Jan and Feb were pretty much lower right?

April above, May slightly lower essentially average.

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2 hours ago, TheClimateChanger said:

Another 90 in the bag… 5 straight. That is the longest since an 8-day stretch ending July 10, 2020.

We also had 5 day stretches in both July and August last summer, which I know doesn’t technically negate your statement.

The only other time we had 5 day streaks of 90 degree temps in 3 consecutive summer months (not necessarily the same summer) was July and August of 1887 and June of 1888.

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18 minutes ago, TimB said:

We also had 5 day stretches in both July and August last summer, which I know doesn’t technically negate your statement.

The only other time we had 5 day streaks of 90 degree temps in 3 consecutive summer months (not necessarily the same summer) was July and August of 1887 and June of 1888.

Oh, well, technically off, then. This stretch *matches* the longest since 2020. Honestly, I forgot about those. I thought the June heat wave was 4-day stretch and 5 out of 6 days, but it looks like that hot spell was technically an 89, followed by 2 90s, then another 89, and then 3 90s. And then I guess there were 5-day stretches in both July and August last year, which clearly didn't garner as much publicity as the June heat wave. Granted with the two 89s in the mix, there were likely parts of the area (downtown, some valley locations) that may have seen 7 days in a row but without an official reading.

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Assuming this morning’s low of 71 holds, it’ll be the 15th time on record that Pittsburgh hasn’t gone below 71 for at least 6 consecutive mornings, the first since August 13-18, 1995 (which is the only other time that’s happened since observations moved to PIT airport in 1952, and the first time it’s ever happened in June.

 

Edit 10:20 pm: alas, it wasn’t to be. The storms killed it and dropped us below 71 this evening.

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On 6/27/2025 at 9:30 AM, TimB said:

Assuming this morning’s low of 71 holds, it’ll be the 15th time on record that Pittsburgh hasn’t gone below 71 for at least 6 consecutive mornings, the first since August 13-18, 1995 (which is the only other time that’s happened since observations moved to PIT airport in 1952, and the first time it’s ever happened in June.

 

Edit 10:20 pm: alas, it wasn’t to be. The storms killed it and dropped us below 71 this evening.

Made it down to 69F before midnight standard time, which was also today’s low. Although only at 9 in a row, I’m interested in seeing how many 80+ days we string together. Seemingly no end in sight, though. Strung together 37 in a row in 2020.

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Up to 72.9F on the month at PIT for the mean temperature, matching 1994 as the highest in June since 1967 (73.0F) and surpassing last year’s final average by 0.1F. Pretty impressive turnaround considering the cold start to the month - we had accumulated an aggregate deficit of 22F from the normal value in just the first 2 days of the month.

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1 hour ago, TheClimateChanger said:

Up to 72.9F on the month at PIT for the mean temperature, matching 1994 as the highest in June since 1967 (73.0F) and surpassing last year’s final average by 0.1F. Pretty impressive turnaround considering the cold start to the month - we had accumulated an aggregate deficit of 22F from the normal value in just the first 2 days of the month.

I assume today’s average should be enough to allow us to jump past 1994 and 1967 to be the hottest June recorded at Pittsburgh International?

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25 minutes ago, TimB said:

I assume today’s average should be enough to allow us to jump past 1994 and 1967 to be the hottest June recorded at Pittsburgh International?

Looks like it. Should finish around 73.1F, which would match 1925 for 11th hottest in the full threaded record and make it the hottest since 1943 in the threaded record.

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The usual Allegheny County flash flood warning in effect.

Flash Flood Warning
PAC003-125-011745-
/O.NEW.KPBZ.FF.W.0095.250701T1451Z-250701T1745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pittsburgh PA
1051 AM EDT Tue Jul 1 2025

The National Weather Service in Pittsburgh has issued a

* Flash Flood Warning for...
  Central Allegheny County in southwestern Pennsylvania...
  Central Washington County in southwestern Pennsylvania...

* Until 145 PM EDT.

* At 1051 AM EDT, Doppler radar indicated thunderstorms producing
  heavy rain over Wilkinsburg, or near Penn Hills, moving east at 20
  mph. Between 0.5 and 1 inch of rain has fallen. Additional
  rainfall amounts up to 1 inch are possible in the warned area.
  Flash flooding is ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Pittsburgh, Penn Hills, Mount Lebanon, Bethel Park, Ross Township,
  McCandless Township, Monroeville, McMurray, McKeesport,
  Canonsburg, Gastonville, Shaler Township, Plum, West Mifflin,
  North Side Pittsburgh, Baldwin, Upper St. Clair, Hampton Township,
  Scott Township and Wilkinsburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 4023 8027 4039 8026 4057 8000 4058 7977
      4055 7977 4055 7974 4053 7971 4039 7975
      4039 7976 4037 7977 4030 7979 4029 7978
      4028 7980 4026 7979 4024 7981 4023 7980

FLASH FLOOD...RADAR INDICATED

$$

MLB
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On 6/28/2025 at 1:39 PM, TheClimateChanger said:

Made it down to 69F before midnight standard time, which was also today’s low. Although only at 9 in a row, I’m interested in seeing how many 80+ days we string together. Seemingly no end in sight, though. Strung together 37 in a row in 2020.

Appears the 80+ streak may already be in jeopardy. Not ruling it out yet.

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2 minutes ago, TimB said:

Appears the 80+ streak may already be in jeopardy. Not ruling it out yet.

That's why I was hesitant to point it out. Always a chance for an all-day cloud and rain event. Even a couple of hours of sun would have easily sent the temperature up to 80F with mid-morning readings in the mid 70s. But probably too little, too late today.

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