Washington County Weather in May
Average highs run from 58°F on May 1 to 67°F on May 31, and lows from 37°F to 48°F. Normal precipitation for the month is 4.10 in over about 16 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
- 63°F
- Average low
- 43°F
- Precipitation
- 4.10 in
- Snowfall
- 0.2 in
- Record high
- 90°FMay 20, 2026
- Record low
- 26°FMay 18, 2023
- Chance of a freeze
- 56%
- Daylight
- 14 h 16 min to 15 h 21 min
- Cloud cover
- 70%
- Humidity
- 82%
- Dew point
- 45°F
- Wind
- 6.0 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 | 58°F | 37°F | 64°F 2013 | 28°F 2019 | 47% | 2% |
| May 2 | 58°F | 38°F | 79°F 2018 | 28°F 2015 | 47% | 1% |
| May 3 | 59°F | 38°F | 71°F 2018 | 34°F 2020 | 47% | 1% |
| May 4 | 59°F | 38°F | 66°F 2020 | 30°F 2026 | 47% | 1% |
| May 5 | 60°F | 39°F | 72°F 2015 | 32°F 2013 | 48% | 1% |
| May 6 | 60°F | 39°F | 76°F 2023 | 28°F 2020 | 48% | 1% |
| May 7 | 60°F | 40°F | 82°F 2015 | 30°F 2021 | 48% | 1% |
| May 8 | 61°F | 40°F | 70°F 2013 | 30°F 2022 | 48% | 1% |
| May 9 | 61°F | 40°F | 70°F 2022 | 28°F 2019 | 49% | 1% |
| May 10 | 61°F | 41°F | 72°F 2022 | 30°F 2023 | 49% | 1% |
| May 11 | 62°F | 41°F | 79°F 2023 | 31°F 2020 | 49% | 1% |
| May 12 | 62°F | 42°F | 81°F 2022 | 29°F 2018 | 49% | 1% |
| May 13 | 62°F | 42°F | 70°F 2023 | 28°F 2020 | 50% | 0% |
| May 14 | 63°F | 42°F | 83°F 2022 | 28°F 2020 | 50% | 0% |
| May 15 | 63°F | 43°F | 72°F 2023 | 32°F 2013 | 50% | 0% |
| May 16 | 63°F | 43°F | 76°F 2017 | 33°F 2019 | 50% | 0% |
| May 17 | 64°F | 44°F | 81°F 2026 | 36°F 2020 | 51% | 0% |
| May 18 | 64°F | 44°F | 89°F 2017 | 26°F 2023 | 51% | 0% |
| May 19 | 64°F | 44°F | 82°F 2017 | 31°F 2018 | 51% | 0% |
| May 20 | 64°F | 45°F | 90°F 2026 | 33°F 2020 | 51% | 0% |
| May 21 | 65°F | 45°F | 76°F 2018 | 35°F 2015 | 51% | 0% |
| May 22 | 65°F | 45°F | 87°F 2020 | 34°F 2026 | 51% | 0% |
| May 23 | 65°F | 46°F | 81°F 2024 | 32°F 2023 | 51% | 0% |
| May 24 | 66°F | 46°F | 79°F 2024 | 30°F 2020 | 50% | 0% |
| May 25 | 66°F | 46°F | 86°F 2018 | 34°F 2020 | 50% | 0% |
| May 26 | 66°F | 47°F | 82°F 2012 | 36°F 2023 | 50% | 0% |
| May 27 | 66°F | 47°F | 81°F 2026 | 38°F 2013 | 50% | 0% |
| May 28 | 67°F | 47°F | 88°F 2023 | 36°F 2019 | 50% | 0% |
| May 29 | 67°F | 48°F | 84°F 2018 | 32°F 2014 | 50% | 0% |
| May 30 | 67°F | 48°F | 84°F 2022 | 36°F 2023 | 50% | 0% |
| May 31 | 67°F | 48°F | 85°F 2013 | 33°F 2026 | 50% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- May 1
- sunrise 5:20 AM, sunset 7:36 PM
- May 31
- sunrise 4:48 AM, sunset 8:09 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00179294 (Wesley), public domain. Records: NOAA GHCN-Daily, station USC00172443, 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.