ChescoWx

Also of note for the longest climate locales in the Chester County data set - the majority of warmest 3 month periods (March thru May) occurred prior to 1960 Coatesville 7 of the top 10 / Phoenixville 7 of the top 10 / West Chester 6 of the top 10 warmest

Your data is much too small for climate review for Chester County PA. My analytics encompasses all available 24 stations - see the below NWS COOP sites / NWS FAA and DEOS/MADIS sites along with the complete years of record. Also as always the data I show is never adjusted to chill the 1940's!

Today will make it 8 of the last 10 days featuring below normal temperatures. That ends tomorrow as temps soar into the high 70's and then 80's on both Monday and Tuesday! A slight shot at some showers today but a better chance on Tuesday. Temps should remain above normal in the mid 70's for much of the upcoming week. Chester County Records for today: High 95 degrees at Sadsburyville (1915) / Low 26 degrees at Coatesville (1926) / Rain 2.45" at East Nantmeal (2007)

Today will make it 8 of the last 10 days featuring below normal temperatures. That ends tomorrow as temps soar into the high 70's and then 80's on both Monday and Tuesday! A slight shot at some showers today but a better chance on Tuesday. Temps should remain above normal in the mid 70's for much of the upcoming week. Chester County Records for today: High 95 degrees at Sadsburyville (1915) / Low 26 degrees at Coatesville (1926) / Rain 2.45" at East Nantmeal (2007)

Below is an analysis of the average temperature by decade here in Chester County for the months March - April and May since the 1890's. The average temperature over these 132 years of records is 51.5 degrees. So far in the 2020's we are running about 0.5 degrees above the average. The 1940's were not surprisingly the warmest decade.

Below is an analysis of the average temperature by decade here in Chester County for the months March - April and May since the 1890's. The average temperature over these 132 years of records is 51.5 degrees. So far in the 2020's we are running about 0.5 degrees above the average. The 1940's were not surprisingly the warmest decade.

Below is an analysis of the average temperature by decade here in Chester County for the months March - April and May since the 1890's. The average temperature over these 132 years of records is 51.5 degrees. So far in the 2020's we are running about 0.5 degrees above the average. The 1940's were not surprisingly the warmest decade.

Near normal temps today before colder again through Saturday. We may see frost or freezes again by Friday morning. Big warm up on the way by Monday with temps possibly reaching the 80's for the first time in some areas. Chester County records for today: High 91 degrees in West Chester (1960) / Low 26 degrees at Coatesville (1930) / Rain 2.40" in Coatesville (1968)

Near normal temps today before colder again through Saturday. We may see frost or freezes again by Friday morning. Big warm up on the way by Monday with temps possibly reaching the 80's for the first time in some areas. Chester County records for today: High 91 degrees in West Chester (1960) / Low 26 degrees at Coatesville (1930) / Rain 2.40" in Coatesville (1968)

It was actually slightly warmer last night with more spots remaining above freezing than Monday AM. The lowest reading I could find was the 29.9 in Warwick Township. Here in East Nantmeal we only made it down to 35.7...I also did not note any frost. While many lower spots have had several days below freezing here in April in EN we have not been below freezing in almost a month (March 25th) Today we should reach the mid 60's for highs. A slight chance of showers tonight and tomorrow with cooler temps again to close out the work week before a nice warming trend kicks in starting Sunday. Chester County records for today: High 91 degrees (1960) / Low 24 at Coatesville (1922) / Rain 2.38" at West Chester (2012) / Snow 2.0" Sadsburyville (1911)

It was actually slightly warmer last night with more spots remaining above freezing than Monday AM. The lowest reading I could find was the 29.9 in Warwick Township. Here in East Nantmeal we only made it down to 35.7...I also did not note any frost. While many lower spots have had several days below freezing here in April in EN we have not been below freezing in almost a month (March 25th) Today we should reach the mid 60's for highs. A slight chance of showers tonight and tomorrow with cooler temps again to close out the work week before a nice warming trend kicks in starting Sunday. Chester County records for today: High 91 degrees (1960) / Low 24 at Coatesville (1922) / Rain 2.38" at West Chester (2012) / Snow 2.0" Sadsburyville (1911)

Arctic sea ice extent is today higher (14.062 million km²) than it was 35-years ago back in 1989 (13.997 million km²), it is now the highest it has been in 11-years. SIE is now greater than 2004, 2005, 2006 and 2007, the year experts predicted it would be “ice-free” by the summer of 2013. SIE should soon surpass 2002, 2008 and 2013 and is trailing behind 1995 and 1996, and has a chance at surpassing that as well.

Mid to upper 30's across most of the county this AM. Today should be an unseasonably chilly late April day with temps likely not escaping the 40's in the higher spots of Chester County this afternoon. I suspect we will see some frost across lower elevations in the county tonight with dew points already well below freezing at this time and clearing skies overnight. Great weather for both Monday and Tuesday before shower chances on Wednesday. Another shot at some frost or even a freeze by Thursday AM again especially in elevations below 500 ft in the county. Chester County wide records for today: High 90 degrees in both Coatesville and Phoenixville (1976) / Record Low 24 degrees at Coatesville (1928) / Rain 2.11" at Longwood Gardens (2012). Of note today is the earliest day without any measurable snow. The latest measurable snow here in Chester County PA was recorded in Glenmoore on May 2, 1963.

Mid to upper 30's across most of the county this AM. Today should be an unseasonably chilly late April day with temps likely not escaping the 40's in the higher spots of Chester County this afternoon. I suspect we will see some frost across lower elevations in the county tonight with dew points already well below freezing at this time and clearing skies overnight. Great weather for both Monday and Tuesday before shower chances on Wednesday. Another shot at some frost or even a freeze by Thursday AM again especially in elevations below 500 ft in the county. Chester County wide records for today: High 90 degrees in both Coatesville and Phoenixville (1976) / Record Low 24 degrees at Coatesville (1928) / Rain 2.11" at Longwood Gardens (2012). Of note today is the earliest day without any measurable snow. The latest measurable snow here in Chester County PA was recorded in Glenmoore on May 2, 1963.

After some light rain overnight we are starting to see some sunshine across the area. It will be a few degrees below normal today with highs only in the low 60s. Sunshine the next few days with well below normal temps both tomorrow and Monday before we warm to near normal by Tuesday. Next shower chances arrive on Tuesday night. Chester County wide records for today: High 91 at West Grove (1941) / Low 23 in Coatesville (1926) / Rain 1.99" in Phoenixville (1940) / Snow 5.0" West Chester (1983)

After some light rain overnight we are starting to see some sunshine across the area. It will be a few degrees below normal today with highs only in the low 60s. Sunshine the next few days with well below normal temps both tomorrow and Monday before we warm to near normal by Tuesday. Next shower chances arrive on Tuesday night. Chester County wide records for today: High 91 at West Grove (1941) / Low 23 in Coatesville (1926) / Rain 1.99" in Phoenixville (1940) / Snow 5.0" West Chester (1983)

After yesterday's chilly day today will be another day with high temps running near 7 degrees below normal with readings in the upper 50's. We get back to near normal temps tomorrow before dropping back to the mid 50's on Sunday. We should see normal to below temps for much of the next 10 days or so. Some shower chances tonight and again by Tuesday night into Wednesday. Chester County records for today: High 93 degrees in West Chester (1976) / Low 24 degrees at Coatesville (1904) / Rain 2.05" Coatesville (1943) / Snow 5.5" in Coatesville (1983)

After yesterday's chilly day today will be another day with high temps running near 7 degrees below normal with readings in the upper 50's. We get back to near normal temps tomorrow before dropping back to the mid 50's on Sunday. We should see normal to below temps for much of the next 10 days or so. Some shower chances tonight and again by Tuesday night into Wednesday. Chester County records for today: High 93 degrees in West Chester (1976) / Low 24 degrees at Coatesville (1904) / Rain 2.05" Coatesville (1943) / Snow 5.5" in Coatesville (1983)

Another sunny day but much cooler than yesterday across the area with temps mainly in the 60's to near 70 (still almost 7 degrees above normal for today). Rain chances ramp up by tomorrow PM and will last till Thursday AM. Another chance of showers on Friday night before we slip back to below normal temperatures for the upcoming weekend. Chester County records for today: High 90 degrees Phoenixville (2002) / Low 20 degrees in Coatesville (1926) / Rain 5.45" Chadds Ford (1983) / Snow 2.5" at Coatesville (1923)

Another sunny day but much cooler than yesterday across the area with temps mainly in the 60's to near 70 (still almost 7 degrees above normal for today). Rain chances ramp up by tomorrow PM and will last till Thursday AM. Another chance of showers on Friday night before we slip back to below normal temperatures for the upcoming weekend. Chester County records for today: High 90 degrees Phoenixville (2002) / Low 20 degrees in Coatesville (1926) / Rain 5.45" Chadds Ford (1983) / Snow 2.5" at Coatesville (1923)

Of course but not for the counties in the southern areas of the thread area...my thoughts were clearly all about Chester County PA as I very clearly always state! I am not commenting for those folks further to the West or North of Chesco...and never do. The area covered by this thread is too large and variable to make a blanket statement which I don't.

Threat for any damaging or tornadic stronger storms will be near to north of I-80. The modeled line clearly weakens as it moves SE between I-80 and I-78. South of I-78 here in Chester County the storms or what's left of them will be showers at most.

Those numbers sure don't sound like consensus.....majority is far far from consensus! "Consensus is invoked only in situations where the science is not solid enough. Nobody says the consensus is the sun is 93 million miles away. It would never occur to anyone to speak that way"Michael Crichton

Some great weather over the next few days although with the winds today might be a bit tough on some allergy sufferers. Looks like shower chances return by Wednesday and could last through the rest of the week! Our wet year continues! Chester County Records for today: High 91 degrees Phoenixville (1941) / Low 21 degrees West Chester (1940) / Rain 2.28" Coatesville (1970) / Snow 2.5" Coatesville (1923)

Some great weather over the next few days although with the winds today might be a bit tough on some allergy sufferers. Looks like shower chances return by Wednesday and could last through the rest of the week! Our wet year continues! Chester County Records for today: High 91 degrees Phoenixville (1941) / Low 21 degrees West Chester (1940) / Rain 2.28" Coatesville (1970) / Snow 2.5" Coatesville (1923)