Pottstown weather in May: Pottstown, Pennsylvania: normal highs, lows, rain and records for May
Pottstown in May has a normal high of 71°F and a normal low of 50°F, a daily mean of 60°F, rising from 67°F on the 1st to 75°F by the 31st. Measurable precipitation falls on 13 days in a normal May, 3.69 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 22°C and low of 10°C, 94 mm of precipitation in May.
- NOAA stationPottstown Limerick Airport
- Station IDUSW00054782
- Location40.24°N 75.56°W
- Elevation291 ft (89 m)
- From the center5 miles
- Population23,553
- Jan 37° 22°
- Feb 40° 23°
- Mar 49° 30°
- Apr 61° 40°
- May 71° 50°
- Jun 79° 59°
- Jul 84° 64°
- Aug 82° 62°
- Sep 75° 55°
- Oct 63° 43°
- Nov 52° 34°
- Dec 42° 27°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Pottstown in May?
The normal high is 71°F and the normal low 50°F, for a daily mean of 60.4°F. May is 9.7°F warmer than April and 8.7°F cooler than June. May is the 5th warmest month of the year in Pottstown and the 8th wettest. Across the month the normal high rises 8°F, from 67°F on May 1 to 75°F on May 31. From one year to the next May's mean temperature typically moves about 3.1°F either way (NOAA's standard deviation), so roughly two Mays in three average between 57°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 44%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 67°F | 45°F | 39% | 22% |
| May 8 | 69°F | 48°F | 40% | 22% |
| May 15 | 71°F | 50°F | 41% | 23% |
| May 22 | 72°F | 52°F | 43% | 24% |
| May 31 | 75°F | 54°F | 44% | 24% |
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 | 67°F | 45°F | 39% | 22% | 13 h 50 min |
| May 2 | 67°F | 46°F | 39% | 22% | 14 h |
| May 3 | 68°F | 46°F | 39% | 22% | 14 h |
| May 4 | 68°F | 46°F | 39% | 22% | 14 h |
| May 5 | 68°F | 47°F | 39% | 22% | 14 h |
| May 6 | 69°F | 47°F | 39% | 22% | 14 h |
| May 7 | 69°F | 47°F | 39% | 22% | 14 h 10 min |
| May 8 | 69°F | 48°F | 40% | 22% | 14 h 10 min |
| May 9 | 69°F | 48°F | 40% | 22% | 14 h 10 min |
| May 10 | 70°F | 48°F | 40% | 23% | 14 h 10 min |
| May 11 | 70°F | 48°F | 40% | 23% | 14 h 10 min |
| May 12 | 70°F | 49°F | 40% | 23% | 14 h 20 min |
| May 13 | 70°F | 49°F | 41% | 23% | 14 h 20 min |
| May 14 | 71°F | 49°F | 41% | 23% | 14 h 20 min |
| May 15 | 71°F | 50°F | 41% | 23% | 14 h 20 min |
| May 16 | 71°F | 50°F | 42% | 23% | 14 h 20 min |
| May 17 | 71°F | 50°F | 42% | 23% | 14 h 30 min |
| May 18 | 72°F | 51°F | 42% | 24% | 14 h 30 min |
| May 19 | 72°F | 51°F | 42% | 24% | 14 h 30 min |
| May 20 | 72°F | 51°F | 42% | 24% | 14 h 30 min |
| May 21 | 72°F | 51°F | 43% | 24% | 14 h 30 min |
| May 22 | 72°F | 52°F | 43% | 24% | 14 h 40 min |
| May 23 | 73°F | 52°F | 43% | 24% | 14 h 40 min |
| May 24 | 73°F | 52°F | 43% | 24% | 14 h 40 min |
| May 25 | 73°F | 53°F | 43% | 24% | 14 h 40 min |
| May 26 | 73°F | 53°F | 43% | 24% | 14 h 40 min |
| May 27 | 74°F | 53°F | 43% | 24% | 14 h 40 min |
| May 28 | 74°F | 54°F | 44% | 24% | 14 h 40 min |
| May 29 | 74°F | 54°F | 44% | 24% | 14 h 50 min |
| May 30 | 75°F | 54°F | 44% | 24% | 14 h 50 min |
| May 31 | 75°F | 54°F | 44% | 24% | 14 h 50 min |
- Normal high
- 71°FMay average
- Normal low
- 50°FMay average
- Precipitation
- 3.69 inmonth total
- Days with precipitation
- 130.01 inch or more
- Days at 90°F or more
- 1
- Daylight
- 13 h 50 min to 14 h 50 minMay 1 to May 31
- Days at 70°F or more
- 20
- Days at 80°F or more
- 8
- Sunshine
- 69%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00054782; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Pottstown in May?
On a given May day the chance of 0.01 inch or more is 41% on average, highest around May 31 (44%). In all, 3.69 in falls on 13 days of a normal May, 1 of them with an inch or more.
In a normal May in Pottstown, 1 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00054782.
What are the records for May in Pottstown?
The warmest May temperature on this station's record (since 1999) is 94°F, on May 31, 2011; the coldest is 30°F, on May 4, 2002. The wettest May brought 7.37 in (2025).
The May mean against the 1991-2020 normal of 60.4°F: 2021 59.6°F (−0.8), 2022 62.0°F (+1.6), 2023 57.6°F (−2.8), 2024 64.3°F (+3.9), 2025 62.1°F (+1.7), 2026 61.1°F (+0.8). 4 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 59.6°F | −0.8°F | 4.67 in |
| 2022 | 62.0°F | +1.6°F | 6.67 in |
| 2023 | 57.6°F | −2.8°F | 0.12 in |
| 2024 | 64.3°F | +3.9°F | 3.11 in |
| 2025 | 62.1°F | +1.7°F | 7.37 in |
| 2026 | 61.1°F | +0.8°F | 2.15 in |
Source: records: ACIS, station USW00054782; recent months: ACIS, station USW00054782. Records and recent months use complete months only.
How does May in Pottstown 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; Pottstown's is 71°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.