Washington County Weather in May
Average highs run from 69°F on May 1 to 81°F on May 31, and lows from 45°F to 53°F. Normal precipitation for the month is 0.61 in over about 3 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
- 75°F
- Average low
- 49°F
- Precipitation
- 0.61 in
- Record high
- 106°FMay 28, 2003
- Record low
- 23°FMay 1, 1967
- Chance of a freeze
- 6%
- Days of 90°F or more
- 1.4
- Daylight
- 13 h 45 min to 14 h 33 min
- Cloud cover
- 41%
- Humidity
- 37%
- Dew point
- 29°F
- Wind
- 9.8 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 | 69°F | 45°F | 95°F 1981 | 23°F 1967 | 10% | 0% |
| May 2 | 70°F | 45°F | 97°F 1998 | 31°F 1967 | 10% | 0% |
| May 3 | 70°F | 45°F | 94°F 2000 | 28°F 1964 | 10% | 0% |
| May 4 | 71°F | 46°F | 95°F 2004 | 30°F 1959 | 10% | 0% |
| May 5 | 71°F | 46°F | 95°F 1989 | 31°F 1950 | 10% | 0% |
| May 6 | 71°F | 46°F | 99°F 1989 | 27°F 1975 | 10% | 0% |
| May 7 | 72°F | 46°F | 96°F 1989 | 30°F 1975 | 10% | 0% |
| May 8 | 72°F | 47°F | 99°F 1989 | 30°F 1950 | 10% | 0% |
| May 9 | 72°F | 47°F | 96°F 2018 | 34°F 1964 | 10% | 0% |
| May 10 | 73°F | 47°F | 96°F 2007 | 30°F 1953 | 10% | 0% |
| May 11 | 73°F | 48°F | 99°F 1996 | 33°F 1953 | 10% | 0% |
| May 12 | 74°F | 48°F | 103°F 1996 | 33°F 1967 | 9% | 0% |
| May 13 | 74°F | 48°F | 100°F 1996 | 32°F 1953 | 9% | 0% |
| May 14 | 74°F | 48°F | 98°F 1997 | 36°F 1953 | 9% | 0% |
| May 15 | 75°F | 49°F | 98°F 1997 | 36°F 1962 | 9% | 0% |
| May 16 | 75°F | 49°F | 99°F 2022 | 36°F 1952 | 9% | 0% |
| May 17 | 76°F | 49°F | 100°F 2009 | 36°F 1981 | 9% | 0% |
| May 18 | 76°F | 49°F | 103°F 2009 | 34°F 1977 | 9% | 0% |
| May 19 | 77°F | 50°F | 102°F 2008 | 35°F 2015 | 9% | 0% |
| May 20 | 77°F | 50°F | 100°F 2008 | 34°F 1974 | 9% | 0% |
| May 21 | 77°F | 50°F | 97°F 2005 | 33°F 1975 | 9% | 0% |
| May 22 | 78°F | 51°F | 98°F 1967 | 37°F 1957 | 9% | 0% |
| May 23 | 78°F | 51°F | 101°F 1984 | 36°F 2015 | 9% | 0% |
| May 24 | 79°F | 51°F | 101°F 2001 | 31°F 1960 | 9% | 0% |
| May 25 | 79°F | 51°F | 102°F 1983 | 33°F 1960 | 9% | 0% |
| May 26 | 79°F | 52°F | 100°F 1983 | 38°F 1953 | 9% | 0% |
| May 27 | 80°F | 52°F | 103°F 2003 | 33°F 1962 | 9% | 0% |
| May 28 | 80°F | 52°F | 106°F 2003 | 33°F 1953 | 9% | 0% |
| May 29 | 81°F | 52°F | 102°F 2000 | 36°F 1953 | 9% | 0% |
| May 30 | 81°F | 53°F | 102°F 1997 | 43°F 1989 | 9% | 0% |
| May 31 | 81°F | 53°F | 102°F 2002 | 38°F 1988 | 9% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MDT).
- May 1
- sunrise 6:39 AM, sunset 8:24 PM
- May 31
- sunrise 6:15 AM, sunset 8:48 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00429136 (Veyo Powerhouse), public domain. Records: NOAA GHCN-Daily, station USC00424968, 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.