Washington weather in May: Washington, Pennsylvania: normal highs, lows, rain and records for May
Washington in May has a normal high of 72°F and a normal low of 49°F, a daily mean of 61°F, rising from 68°F on the 1st to 76°F by the 31st. Measurable precipitation falls on 14 days in a normal May, 4.14 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 22°C and low of 10°C, 105 mm of precipitation in May.
- NOAA stationWashington (3 mi NE)
- Station IDUSC00369318
- Location40.18°N 80.19°W
- Elevation1,300 ft (396 m)
- From the center3 miles
- Population13,334
- Jan 37° 20°
- Feb 40° 22°
- Mar 49° 29°
- Apr 63° 40°
- May 72° 49°
- Jun 80° 58°
- Jul 83° 62°
- Aug 83° 60°
- Sep 76° 54°
- Oct 64° 43°
- Nov 52° 33°
- Dec 41° 26°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Washington in May?
The normal high is 72°F and the normal low 49°F, for a daily mean of 60.5°F. May is 9.4°F warmer than April and 8.4°F cooler than June. May is the 5th warmest month of the year in Washington and the 2nd wettest. Across the month the normal high rises 8°F, from 68°F on May 1 to 76°F on May 31. From one year to the next May's mean temperature typically moves about 3.9°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 46%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 68°F | 45°F | 46% | 29% |
| May 8 | 70°F | 47°F | 46% | 29% |
| May 15 | 72°F | 49°F | 46% | 29% |
| May 22 | 73°F | 51°F | 46% | 29% |
| May 31 | 76°F | 53°F | 45% | 28% |
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 | 68°F | 45°F | 46% | 29% | 13 h 50 min |
| May 2 | 69°F | 45°F | 46% | 29% | 13 h 50 min |
| May 3 | 69°F | 46°F | 46% | 29% | 14 h |
| May 4 | 69°F | 46°F | 46% | 29% | 14 h |
| May 5 | 69°F | 46°F | 46% | 29% | 14 h |
| May 6 | 70°F | 47°F | 46% | 29% | 14 h |
| May 7 | 70°F | 47°F | 46% | 29% | 14 h 10 min |
| May 8 | 70°F | 47°F | 46% | 29% | 14 h 10 min |
| May 9 | 70°F | 47°F | 46% | 29% | 14 h 10 min |
| May 10 | 71°F | 48°F | 46% | 29% | 14 h 10 min |
| May 11 | 71°F | 48°F | 46% | 29% | 14 h 10 min |
| May 12 | 71°F | 48°F | 46% | 29% | 14 h 20 min |
| May 13 | 71°F | 48°F | 46% | 29% | 14 h 20 min |
| May 14 | 71°F | 49°F | 46% | 29% | 14 h 20 min |
| May 15 | 72°F | 49°F | 46% | 29% | 14 h 20 min |
| May 16 | 72°F | 49°F | 46% | 29% | 14 h 20 min |
| May 17 | 72°F | 49°F | 46% | 29% | 14 h 30 min |
| May 18 | 72°F | 50°F | 46% | 29% | 14 h 30 min |
| May 19 | 73°F | 50°F | 46% | 29% | 14 h 30 min |
| May 20 | 73°F | 50°F | 46% | 29% | 14 h 30 min |
| May 21 | 73°F | 50°F | 46% | 29% | 14 h 30 min |
| May 22 | 73°F | 51°F | 46% | 29% | 14 h 30 min |
| May 23 | 74°F | 51°F | 46% | 28% | 14 h 40 min |
| May 24 | 74°F | 51°F | 46% | 28% | 14 h 40 min |
| May 25 | 74°F | 51°F | 46% | 28% | 14 h 40 min |
| May 26 | 74°F | 52°F | 46% | 28% | 14 h 40 min |
| May 27 | 75°F | 52°F | 45% | 28% | 14 h 40 min |
| May 28 | 75°F | 52°F | 45% | 28% | 14 h 40 min |
| May 29 | 75°F | 53°F | 45% | 28% | 14 h 50 min |
| May 30 | 75°F | 53°F | 45% | 28% | 14 h 50 min |
| May 31 | 76°F | 53°F | 45% | 28% | 14 h 50 min |
- Normal high
- 72°FMay average
- Normal low
- 49°FMay average
- Precipitation
- 4.14 inmonth total
- Days with precipitation
- 140.01 inch or more
- 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
- 17
- Days at 80°F or more
- 7
- Sunshine
- 70%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00369318; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Washington in May?
On a given May day the chance of 0.01 inch or more is 46% on average, highest around May 9 (46%). In all, 4.14 in falls on 14 days of a normal May, 1 of them with an inch or more.
In a normal May in Washington, 1 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00369318.
How does May in Washington 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; Washington's is 72°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.