ChescoWx

Below is the June and 1st Half of 2026 Chester County Area Climate Summary. Overall the county finished with a slightly above average temperature of 70.8 degrees or 0.6 degrees above the 1991-2020 climate baseline for June of 70.2 degrees. When using the entire climate dataset since 1893 we finished only +0.4 degrees above our overall 134 year average June temperature which is 70.4. This was 1.2 degrees cooler than June 2025 and our coolest June since the 67.4 degree average in June 2023. This was our 61st warmest June over the last 134 years of county climate data. Through the 1st 6 months of the year our average temperature was 48.0 degrees. This is 0.4 degrees below the 1991-2020 baseline and 0.1 degree over the 1893 - 2025 baseline. This represents our coldest start to a year since 2015. Overall this is the 66th warmest 1st half of a year over the last 134 years. Average precipitation across all stations was 3.11" this is 1.20" the 1991-2020 baseline and 1.02" below the overall average since 1893. For the 1st half of the year county precipitation has averaged 15.34" this is 6.95" below the 1991-2020 baseline of 22.29" and 6.82" below the 1893-2026 all years average of 22.16". This is our 7th driest average precipitation total with the lowest being the 13.82" average for the first half of 1963.

Below is the June and 1st Half of 2026 Chester County Area Climate Summary. Overall the county finished with a slightly above average temperature of 70.8 degrees or 0.6 degrees above the 1991-2020 climate baseline for June of 70.2 degrees. When using the entire climate dataset since 1893 we finished only +0.4 degrees above our overall 134 year average June temperature which is 70.4. This was 1.2 degrees cooler than June 2025 and our coolest June since the 67.4 degree average in June 2023. This was our 61st warmest June over the last 134 years of county climate data. Through the 1st 6 months of the year our average temperature was 48.0 degrees. This is 0.4 degrees below the 1991-2020 baseline and 0.1 degree over the 1893 - 2025 baseline. This represents our coldest start to a year since 2015. Overall this is the 66th warmest 1st half of a year over the last 134 years. Average precipitation across all stations was 3.11" this is 1.20" the 1991-2020 baseline and 1.02" below the overall average since 1893. For the 1st half of the year county precipitation has averaged 15.34" this is 6.95" below the 1991-2020 baseline of 22.29" and 6.82" below the 1893-2026 all years average of 22.16". This is our 7th driest average precipitation total with the lowest being the 13.82" average for the first half of 1963.

Below is the June and 1st Half of 2026 Chester County Area Climate Summary. Overall the county finished with a slightly above average temperature of 70.8 degrees or 0.6 degrees above the 1991-2020 climate baseline for June of 70.2 degrees. When using the entire climate dataset since 1893 we finished only +0.4 degrees above our overall 134 year average June temperature which is 70.4. This was 1.2 degrees cooler than June 2025 and our coolest June since the 67.4 degree average in June 2023. This was our 61st warmest June over the last 134 years of county climate data. Through the 1st 6 months of the year our average temperature was 48.0 degrees. This is 0.4 degrees below the 1991-2020 baseline and 0.1 degree over the 1893 - 2025 baseline. This represents our coldest start to a year since 2015. Overall this is the 66th warmest 1st half of a year over the last 134 years. Average precipitation across all stations was 3.11" this is 1.20" the 1991-2020 baseline and 1.02" below the overall average since 1893. For the 1st half of the year county precipitation has averaged 15.34" this is 6.95" below the 1991-2020 baseline of 22.29" and 6.82" below the 1893-2026 all years average of 22.16". This is our 7th driest average precipitation total with the lowest being the 13.82" average for the first half of 1963.

This is excellent thank you!! I have looked at this in the past but you have really detailed and packaged this nicely!!! most appreciated!! I will dive into this!!

The low here in East Nantmeal was only 77.2 degrees. This is the 3rd highest minimum temperature since 2004. Another hot day today with temperatures close to what they were yesterday - mid 90's to near 100 degrees. Small chances of some showers tonight and we begin to slowly trim the heat with highs tomorrow closer to the mid-90's. Shower at T-storm chances ramp up later tomorrow and at night. We then fall back closer to normal temperatures on Sunday before we trend to below normal temperatures by both Monday and Tuesday.

The low here in East Nantmeal was only 77.2 degrees. This is the 3rd highest minimum temperature since 2004. Another hot day today with temperatures close to what they were yesterday - mid 90's to near 100 degrees. Small chances of some showers tonight and we begin to slowly trim the heat with highs tomorrow closer to the mid-90's. Shower at T-storm chances ramp up later tomorrow and at night. We then fall back closer to normal temperatures on Sunday before we trend to below normal temperatures by both Monday and Tuesday.

77.2 for the low in EN our 3rd highest min since 2004! We are off to the races today!

LOL!!! Ruh Roh.... sorry Redsky he may have had a couple when he posted this..... but in addition to my station in SE PA in Chester County - the professional stations at Nottingham DEOS, Atglen DEOS, KMQS Coatesville Airport, Glenmoore DEOS, Nottingham DEOS, West Grove DEOS all failed to hit 98 degrees today. Me thinks all these professional station thermometers are not wrong!! Thoughts RedSky??

True and my lows are routinely higher than most....ridge vs valley microclimates in this area.

This is only about my station readings @Stebosaid my readings are 3 to 5 degrees too low...that is just fake news on his part as I have clearly shown. Not sure what convo you are talking about - assuming it is the chilling of the 1930's thru 1950's historical data correct? thanks!

Thanks Mount Joy! I have used the exact same equipment and location for 23 years.

Folks that live here understand the difference....and the data backs it up. thanks!

Of course see below. You do realize that the facts and actual stats clearly show with a significant p-value that the fact remain that my EN station and the Chester County PA USCRN are statistically exactly the same with over 7,000 days of daily historical data since 2007. Facts have nothing to do with a degreed meteorologist view or "thoughts" on the actual data. You may not like it but it is factual and they don't care about your feelings.

LOL!! Both you and @Stebohave of course been clearly wrong for years as the below data certainly shows. Below is an analysis of the US Climate Resource Network Site here in Chester County vs. East Nantmeal for the last 19 years of average annual temperature data. Well looky at this! Over the last 19 years we are not only close we are exactly the same!!! 53.2 degrees vs 53.2 degrees!! If you are unfamiliar with US CRN it is a systematic network of more than 130 highly accurate climate-monitoring stations across the United States, managed by the National Oceanic and Atmospheric Administration (NOAA). Now how many degrees again do you think EN is off??

Of course not...even today only a 1.8 degree difference from the highest elevation station mine in East Nantmeal at 94.8 and West Grove in far Southern Chesco at 96.6

As of 5pm no Chester County professional stations have hit 100 degrees the highest was at the Longwood Gardens DEOS with 99.3 degrees. All stations were between 95 and 99 degrees

94.8 degrees for the high so far today in EN. This is now the 5th warmest reading here in East Nantmeal in the last 23 years back to 2004! Top 10 warmest are below...of note that same day 7/22/11 is the only day KMQS Coatesville Airport has ever recorded a 100 degree reading.

94.8 degrees for the high so far today in EN. This is now the 5th warmest reading here in East Nantmeal in the last 23 years back to 2004! Top 10 warmest are below...of note that same day 7/22/11 is the only day KMQS Coatesville Airport has ever recorded a 100 degree reading.

KMQS has only reached 100 degrees one time since records began on July 22, 2011 when they hit 100.4 - that was also my hottest day when we hit 99.1 degrees

I went to a business persons special during that magical summer of 1993 against the Cardinals....I was dripping the entire game! I have no idea how folks are sitting through this game at CBP this afternoon!!

Some folks on my FB page were asking about thermometer siting after seeing some reports of 107 in my area while I am 92.6 I posted the below along with some guidance from the NWS. Some have questioned if they should allow their thermometer to receive direct sunlight. Per the NWS "Radiation Shield: "Never place a thermometer in direct sunlight" unless you have a louvered radiation shield and/or a fan aspiration unit (see my station photo below) My station does receive direct sunlight but I have both the shield and fan aspiration to ensure my reported temps are not sun inflated. Per the NWS "Use a slotted "beehive" or louvered radiation shield that blocks direct and reflected sunlight while allowing air to flow freely.Surrounding Terrain: The thermometer should sit over natural vegetation, such as grass, rather than over patios, artificial turf, or bare dirt.Clearance from Obstructions: Place the sensor away from structures. The distance between your thermometer and any nearby trees, buildings, or fences should be at least four times the height of the obstruction (e.g., if a tree is 20 feet tall, the sensor should be 80 feet away). Artificial Heat Sources: Keep the sensor at least 100 feet away from paved driveways, parking lots, and large concrete surfaces. Additionally, ensure it is far from artificial heat exhausts, such as furnace vents, chimneys, and air conditioning."

Some folks on my FB page were asking about thermometer siting after seeing some reports of 107 in my area while I am 92.6 I posted the below along with some guidance from the NWS. Some have questioned if they should allow their thermometer to receive direct sunlight. Per the NWS "Radiation Shield: "Never place a thermometer in direct sunlight" unless you have a louvered radiation shield and/or a fan aspiration unit (see my station photo below) My station does receive direct sunlight but I have both the shield and fan aspiration to ensure my reported temps are not sun inflated. Per the NWS "Use a slotted "beehive" or louvered radiation shield that blocks direct and reflected sunlight while allowing air to flow freely.Surrounding Terrain: The thermometer should sit over natural vegetation, such as grass, rather than over patios, artificial turf, or bare dirt.Clearance from Obstructions: Place the sensor away from structures. The distance between your thermometer and any nearby trees, buildings, or fences should be at least four times the height of the obstruction (e.g., if a tree is 20 feet tall, the sensor should be 80 feet away). Artificial Heat Sources: Keep the sensor at least 100 feet away from paved driveways, parking lots, and large concrete surfaces. Additionally, ensure it is far from artificial heat exhausts, such as furnace vents, chimneys, and air conditioning."

Today will be our hottest day with the possibility that many lower spots touch 100 degrees and could approach the record for the day of 103 degrees set way back in 1901 at Coatesville 1SW at 103 degrees. We have not set a record high in the month of July since back on July 24, 2016 when a record of 100 degrees was set at Phoenixville 1E. The heat continues through the weekend but with shower chances steadily increasing by later July 4th through the day on Monday. Temperatures will fall back to near normal by Tuesday and back to below normal temperatures by Wednesday.

Today will be our hottest day with the possibility that many lower spots touch 100 degrees and could approach the record for the day of 103 degrees set way back in 1901 at Coatesville 1SW at 103 degrees. We have not set a record high in the month of July since back on July 24, 2016 when a record of 100 degrees was set at Phoenixville 1E. The heat continues through the weekend but with shower chances steadily increasing by later July 4th through the day on Monday. Temperatures will fall back to near normal by Tuesday and back to below normal temperatures by Wednesday.

Here in East Nantmeal I recorded a high of 91.0 degrees this is only the 66th time since 2004 we have seen a 90+ day at this location. This is the first such day here since last June 25, 2025. Other area highs Atglen DEOS 92.2 / KMQS 92.1 / Glenmoore DEOS 93.6 / Nottingham DEOS 91.2 / Warwick DEOS 94.8 / Devault DEOS 94.8 / Kennett Square DEOS 94.3 / Longwood Gardens DEOS 94.6 / West Bradford DEOS 93.1 / West Chester DEOS 96.8 / West Grove DEOS 92.6