Washington County Weather in May
Average highs run from 78°F on May 1 to 83°F on May 31, and lows from 54°F to 62°F. Normal precipitation for the month is 4.14 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
- 80°F
- Average low
- 58°F
- Precipitation
- 4.14 in
- Record high
- 98°FMay 20, 1996
- Record low
- 35°FMay 6, 1920
- Chance of a freeze
- 0%
- Days of 90°F or more
- 3.2
- Daylight
- 13 h 39 min to 14 h 25 min
- Cloud cover
- 57%
- Humidity
- 77%
- Dew point
- 60°F
- Wind
- 8.3 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 | 78°F | 54°F | 95°F 1942 | 36°F 2006 | 36% | 0% |
| May 2 | 78°F | 54°F | 91°F 2010 | 38°F 2006 | 36% | 0% |
| May 3 | 78°F | 55°F | 93°F 1913 | 40°F 1937 | 36% | 0% |
| May 4 | 78°F | 55°F | 93°F 1938 | 36°F 1941 | 36% | 0% |
| May 5 | 78°F | 55°F | 93°F 1938 | 40°F 1911 | 36% | 0% |
| May 6 | 79°F | 55°F | 93°F 1913 | 35°F 1920 | 36% | 0% |
| May 7 | 79°F | 56°F | 93°F 1916 | 37°F 1920 | 36% | 0% |
| May 8 | 79°F | 56°F | 92°F 1940 | 35°F 1911 | 36% | 0% |
| May 9 | 79°F | 56°F | 93°F 1936 | 36°F 1956 | 36% | 0% |
| May 10 | 79°F | 57°F | 93°F 1963 | 39°F 1947 | 36% | 0% |
| May 11 | 79°F | 57°F | 92°F 1896 | 35°F 1947 | 36% | 0% |
| May 12 | 80°F | 57°F | 90°F 1922 | 40°F 1907 | 36% | 0% |
| May 13 | 80°F | 57°F | 93°F 1956 | 40°F 1928 | 36% | 0% |
| May 14 | 80°F | 58°F | 97°F 1956 | 38°F 1928 | 36% | 0% |
| May 15 | 80°F | 58°F | 92°F 1944 | 40°F 1910 | 36% | 0% |
| May 16 | 80°F | 58°F | 93°F 1915 | 36°F 1920 | 36% | 0% |
| May 17 | 80°F | 58°F | 96°F 1941 | 39°F 1920 | 36% | 0% |
| May 18 | 80°F | 59°F | 95°F 1928 | 43°F 1983 | 36% | 0% |
| May 19 | 81°F | 59°F | 94°F 1927 | 36°F 1920 | 36% | 0% |
| May 20 | 81°F | 59°F | 98°F 1996 | 42°F 1914 | 36% | 0% |
| May 21 | 81°F | 59°F | 96°F 1996 | 41°F 2002 | 36% | 0% |
| May 22 | 81°F | 60°F | 96°F 1941 | 42°F 1907 | 36% | 0% |
| May 23 | 81°F | 60°F | 98°F 1941 | 44°F 1936 | 36% | 0% |
| May 24 | 82°F | 60°F | 97°F 2019 | 40°F 1967 | 36% | 0% |
| May 25 | 82°F | 61°F | 96°F 1933 | 44°F 1976 | 36% | 0% |
| May 26 | 82°F | 61°F | 94°F 1933 | 44°F 1925 | 36% | 0% |
| May 27 | 82°F | 61°F | 98°F 1941 | 41°F 1925 | 36% | 0% |
| May 28 | 82°F | 61°F | 97°F 1933 | 40°F 1925 | 36% | 0% |
| May 29 | 83°F | 62°F | 98°F 1941 | 41°F 1922 | 36% | 0% |
| May 30 | 83°F | 62°F | 97°F 2019 | 40°F 1926 | 36% | 0% |
| May 31 | 83°F | 62°F | 95°F 1942 | 46°F 1932 | 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 6:14 AM, sunset 7:53 PM
- May 31
- sunrise 5:52 AM, sunset 8:17 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00316853 (Plymouth 5 E), public domain. Records: NOAA GHCN-Daily, station USC00312635, 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.