Westmoreland County Weather in May
Average highs run from 74°F on May 1 to 80°F on May 31, and lows from 51°F to 59°F. Normal precipitation for the month is 3.90 in over about 11 wet days.
May day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
May at a glance
- Average high
- 77°F
- Average low
- 55°F
- Precipitation
- 3.90 in
- Record high
- 99°FMay 29, 1941
- Record low
- 29°FMay 11, 1906
- Chance of a freeze
- 4%
- Days of 90°F or more
- 2.8
- Daylight
- 13 h 47 min to 14 h 38 min
- Cloud cover
- 60%
- Humidity
- 76%
- Dew point
- 56°F
- Wind
- 5.1 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| May 1 | 74°F | 51°F | 96°F 1942 | 31°F 1926 | 37% | 0% |
| May 2 | 75°F | 51°F | 93°F 1942 | 32°F 1925 | 37% | 0% |
| May 3 | 75°F | 52°F | 91°F 1913 | 32°F 1925 | 37% | 0% |
| May 4 | 75°F | 52°F | 91°F 1965 | 33°F 1986 | 37% | 0% |
| May 5 | 75°F | 52°F | 94°F 1928 | 31°F 1920 | 37% | 0% |
| May 6 | 75°F | 53°F | 92°F 1986 | 30°F 1925 | 37% | 0% |
| May 7 | 75°F | 53°F | 95°F 1943 | 33°F 1925 | 37% | 0% |
| May 8 | 76°F | 53°F | 92°F 2000 | 32°F 1925 | 37% | 0% |
| May 9 | 76°F | 53°F | 97°F 1963 | 34°F 1956 | 37% | 0% |
| May 10 | 76°F | 54°F | 96°F 1963 | 30°F 1947 | 37% | 0% |
| May 11 | 76°F | 54°F | 92°F 1911 | 29°F 1906 | 37% | 0% |
| May 12 | 76°F | 54°F | 94°F 2018 | 30°F 1913 | 37% | 0% |
| May 13 | 77°F | 55°F | 94°F 2000 | 35°F 1928 | 37% | 0% |
| May 14 | 77°F | 55°F | 94°F 1900 | 31°F 1928 | 36% | 0% |
| May 15 | 77°F | 55°F | 94°F 1962 | 37°F 1920 | 36% | 0% |
| May 16 | 77°F | 55°F | 95°F 1944 | 34°F 1920 | 36% | 0% |
| May 17 | 77°F | 56°F | 94°F 2017 | 35°F 1920 | 36% | 0% |
| May 18 | 77°F | 56°F | 96°F 1911 | 36°F 1955 | 36% | 0% |
| May 19 | 78°F | 56°F | 97°F 1911 | 36°F 1925 | 36% | 0% |
| May 20 | 78°F | 56°F | 97°F 1911 | 39°F 2009 | 36% | 0% |
| May 21 | 78°F | 57°F | 95°F 1911 | 37°F 1992 | 36% | 0% |
| May 22 | 78°F | 57°F | 98°F 1941 | 35°F 2002 | 36% | 0% |
| May 23 | 78°F | 57°F | 98°F 1941 | 36°F 1895 | 36% | 0% |
| May 24 | 79°F | 58°F | 92°F 1964 | 35°F 1926 | 36% | 0% |
| May 25 | 79°F | 58°F | 93°F 1991 | 38°F 1928 | 36% | 0% |
| May 26 | 79°F | 58°F | 93°F 1991 | 35°F 1925 | 36% | 0% |
| May 27 | 79°F | 58°F | 97°F 1941 | 35°F 1925 | 36% | 0% |
| May 28 | 80°F | 59°F | 98°F 1941 | 39°F 1997 | 36% | 0% |
| May 29 | 80°F | 59°F | 99°F 1941 | 36°F 1926 | 36% | 0% |
| May 30 | 80°F | 59°F | 98°F 1991 | 40°F 1926 | 36% | 0% |
| May 31 | 80°F | 59°F | 99°F 1991 | 41°F 1906 | 36% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- May 1
- sunrise 6:11 AM, sunset 7:58 PM
- May 31
- sunrise 5:46 AM, sunset 8:24 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00448894 (Warsaw 2 Nw), public domain. Records: NOAA GHCN-Daily, station USC00448894, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.