chescowxman

Many of our valley locations saw lows well down into the 50's with the coolest being the 53.6 at Warwick Township. We start the week with near normal temperatures and low humidity but by Thursday many spots will be in the low 90's with increasing humidity. We look to stay hot through the weekend, but it looks to be short lived with cooler temperatures arriving next week. Our best rain chance will be Wednesday afternoon into the evening.

Temperatures similar to yesterday with highs in the low to mid 80's. We turn a couple of degrees cooler tomorrow. We then start a warming trend with some spots touching 90 degrees on both Thursday and Friday. There will be some chances at a shower by Thursday night.

Today the PHL Airport looks to record a "heat wave" with their 3rd straight 90+ day. Here in Chesco most spots have not hit 90 degrees over the last few weeks, but we should see many spots do so today. There is a chance of some thunderstorms later this evening that would be welcomed as we continue to run dry across the region. A few degrees cooler tomorrow and several degrees cooler than that on Monday. We start another warming trend on Tuesday and could reach close to 90 degrees again by Thursday.

Through May this has been our coldest start to a year since 2015. We should finally see some above normal temperatures starting tomorrow and peaking at around 90 degrees by Saturday. We then see some increasing chances of showers by Saturday night with temperatures cooling back to near normal levels by next Monday.

Of note here in the philly burbs of Chester County PA Spring of 2026 was the 14th warmest Spring since 1893 - conversely Winter 2025-26 was our 14th coldest! Our weather does have a way of balancing out! Below is our Spring Temperature trends since 1893....only some slight warming is shown.

Below is the May 2026 Chester County Climate Summary. We finished May with an average temperature of 60.8 degrees across all stations. This was 0.7 degrees below the 1991-2020 average May temperature of 61.5 degrees. This was the 56th coldest May in 134 years of records back to 1893.

Today will be the 11th of the last 13 days with below normal temperatures. Sunny and dry through Saturday. We should finally see some warmer than average temperatures by the end of the week and into the weekend. Rain chances look to increase by Sunday.

Lows this morning were not too far from record cold levels for the final day of May. The lowest was the 38-degree reading at Warwick Township. During our last 37 days we have seen 26 of those days with below normal temperatures here in East Nantmeal. This pattern looks to it will continue through mid-week before we finally see temperatures warming to above normal by the end of the work week. Unfortunately there is no rain in site.

As we get into the summer months lower elevation (<450 ft asl) areas of Chester County PA will see at least one heat wave (defined as 3 or more consecutive days with highs at 90 degrees or above) while the relatively higher ridge locations (>600 ft asl) only average a heat wave every couple of years or so. Below sorted by highest to lowest elevation is a ranking of all reporting stations since 2000 with their recorded heat waves. Our lowest elevation spot at Phoenixville averages a whopping two to four times the number of heat waves as almost all other locations across the county.

Some outstanding weather on the way for much of the next week. We will stay a few degrees below normal until maybe warming up close to average temperatures for June by next weekend. In fact here in East Nantmeal May will finish as the 6th below normal month over the last 8 months dating back to last October. Rain chances look slim to none over the next week.

A great stretch of weather with temperatures running at least a few degrees below normal for the end of May and the start of June. With highs in the upper 60's to lower 70's and nights in the upper 40's to lower 50's. No rain chances through the weekend.

Some more needed rain is crossing the area this morning. We are now up to over 85% of our normal rainfall for the year to date here in East Nantmeal with some spots now approaching average precipitation levels for the year. Today will be our last in a stretch of mainly cloudy and wet days. A beautiful end to the work week and upcoming weekend is on the way. Plenty of sun on the way with temperatures running a few degrees below normal as we close out May and move into June.

Partly sunny today with a chance of some showers tomorrow morning. Today and tomorrow will be our warmest days of the week with temperatures a couple of degrees above normal for late May with highs in the upper 70's. A great stretch of weather begins on Thursday and through the weekend with sunny skies and with temperatures cooling to several degrees below normal by Saturday with highs near 70 degrees.

Since Tuesday a general 2.5" to 5.0" of very welcome rainfall has taken place across Chester County. West Grove 5.14" / West Bradford 4.39" / Kennett Square 4.32" / Longwood Gardens 4.22" / West Chester 3.97" / Nottingham 3.24" / Atglen 2.91" / Glenmoore 2.87" / Chester Springs 2.79" / East Nantmeal 2.62" and Warwick Twp. 2.48"

Temperatures across the area have dropped into the 40's after a midnight high in the low 50's. Today will be breezy and raw with rain increasing as we move through the afternoon and especially tonight. Most of the steadiest rain should exit Chester County to the east by later tomorrow morning. Most areas should see around an inch of rain by tomorrow afternoon. Some showers will continue on Monday begore we finally dry out on Tuesday. We briefly warm up to above normal temperatures by Wednesday before we trend back to below normal temperatures by the end of the week and into next weekend.