West Chester weather in May: West Chester, Pennsylvania: normal highs, lows, rain and records for May
West Chester in May has a normal high of 73°F and a normal low of 49°F, a daily mean of 61°F, rising from 69°F on the 1st to 77°F by the 31st. Measurable precipitation falls on 11 days in a normal May, 3.81 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 9°C, 97 mm of precipitation in May.
- NOAA stationWest Chester (2 mi NW)
- Station IDUSC00369464
- Location39.97°N 75.64°W
- Elevation375 ft (114 m)
- From the center2 miles
- Population22,758
- Jan 40° 20°
- Feb 43° 21°
- Mar 51° 29°
- Apr 63° 38°
- May 73° 49°
- Jun 82° 59°
- Jul 86° 64°
- Aug 84° 62°
- Sep 78° 54°
- Oct 66° 41°
- Nov 55° 32°
- Dec 44° 25°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is West Chester in May?
The normal high is 73°F and the normal low 49°F, for a daily mean of 60.8°F. May is 10.1°F warmer than April and 9.6°F cooler than June. May is the 5th warmest month of the year in West Chester and the 8th wettest. Across the month the normal high rises 8°F, from 69°F on May 1 to 77°F on May 31. From one year to the next May's mean temperature typically moves about 3.2°F either way (NOAA's standard deviation), so roughly two Mays in three average between 58°F and 64°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 37%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 69°F | 43°F | 36% | 23% |
| May 8 | 71°F | 46°F | 36% | 23% |
| May 15 | 73°F | 48°F | 37% | 24% |
| May 22 | 75°F | 51°F | 37% | 24% |
| May 31 | 77°F | 54°F | 37% | 25% |
Every day of May: normal high, low and chance of precipitation (warmest afternoon May 31, coldest night May 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| May 1 | 69°F | 43°F | 36% | 23% | 13 h 50 min |
| May 2 | 69°F | 44°F | 36% | 23% | 13 h 50 min |
| May 3 | 70°F | 44°F | 36% | 23% | 14 h |
| May 4 | 70°F | 44°F | 36% | 23% | 14 h |
| May 5 | 70°F | 45°F | 36% | 23% | 14 h |
| May 6 | 71°F | 45°F | 36% | 23% | 14 h |
| May 7 | 71°F | 45°F | 36% | 23% | 14 h 10 min |
| May 8 | 71°F | 46°F | 36% | 23% | 14 h 10 min |
| May 9 | 71°F | 46°F | 36% | 23% | 14 h 10 min |
| May 10 | 72°F | 47°F | 37% | 24% | 14 h 10 min |
| May 11 | 72°F | 47°F | 37% | 24% | 14 h 10 min |
| May 12 | 72°F | 47°F | 37% | 24% | 14 h 20 min |
| May 13 | 72°F | 48°F | 37% | 24% | 14 h 20 min |
| May 14 | 73°F | 48°F | 37% | 24% | 14 h 20 min |
| May 15 | 73°F | 48°F | 37% | 24% | 14 h 20 min |
| May 16 | 73°F | 49°F | 37% | 24% | 14 h 20 min |
| May 17 | 73°F | 49°F | 37% | 24% | 14 h 20 min |
| May 18 | 73°F | 49°F | 37% | 24% | 14 h 30 min |
| May 19 | 74°F | 50°F | 37% | 24% | 14 h 30 min |
| May 20 | 74°F | 50°F | 37% | 24% | 14 h 30 min |
| May 21 | 74°F | 50°F | 37% | 24% | 14 h 30 min |
| May 22 | 75°F | 51°F | 37% | 24% | 14 h 30 min |
| May 23 | 75°F | 51°F | 37% | 24% | 14 h 40 min |
| May 24 | 75°F | 51°F | 37% | 24% | 14 h 40 min |
| May 25 | 75°F | 52°F | 37% | 24% | 14 h 40 min |
| May 26 | 76°F | 52°F | 37% | 24% | 14 h 40 min |
| May 27 | 76°F | 53°F | 37% | 24% | 14 h 40 min |
| May 28 | 76°F | 53°F | 37% | 25% | 14 h 40 min |
| May 29 | 76°F | 53°F | 37% | 25% | 14 h 40 min |
| May 30 | 77°F | 54°F | 37% | 24% | 14 h 50 min |
| May 31 | 77°F | 54°F | 37% | 25% | 14 h 50 min |
- Normal high
- 73°FMay average
- Normal low
- 49°FMay average
- Precipitation
- 3.81 inmonth total
- Days with precipitation
- 110.01 inch or more
- Days at 90°F or more
- 2
- Nights at 32°F or colder
- 1
- Daylight
- 13 h 50 min to 14 h 50 minMay 1 to May 31
- Days at 70°F or more
- 21
- Days at 80°F or more
- 10
- Sunshine
- 72%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00369464; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in West Chester in May?
On a given May day the chance of 0.01 inch or more is 37% on average, highest around May 18 (37%). In all, 3.81 in falls on 11 days of a normal May, 1 of them with an inch or more.
In a normal May in West Chester, 2 days reach 90°F and 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00369464.
What are the records for May in West Chester?
The warmest May temperature on this station's record (since 1893) is 98°F, on May 20, 1962; the coldest is 27°F, on May 1, 1978. The wettest May brought 8.91 in (1948).
Source: records: ACIS, station USC00369464. Records and recent months use complete months only.
How does May in West Chester compare across Pennsylvania?
Across the 108 places PlainClimate covers in Pennsylvania, May normal highs run from 65°F in Laporte to 75°F in Phoenixville; West Chester's is 73°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- West Chester in April63°F by day, 38°F at night
- West Chester in June82°F by day, 59°F at night
- West Chester through the yearEvery month, frost dates, records and recent years
- Pennsylvania in MayThe statewide normal and the warmest and coolest places
- Phoenixville: Pennsylvania's warmest Maynormal high 75°F