Mount Vernon Weather in May
Average highs run from 60°F on May 1 to 70°F on May 31, and lows from 36°F to 46°F. Normal precipitation for the month is 3.42 in over about 13 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
- 66°F
- Average low
- 41°F
- Precipitation
- 3.42 in
- Snowfall
- 0.3 in
- Record high
- 98°FMay 22, 1977
- Record low
- 21°FMay 7, 1982
- Chance of a freeze
- 84%
- Daylight
- 14 h 14 min to 15 h 18 min
- Cloud cover
- 68%
- Humidity
- 79%
- Dew point
- 46°F
- Wind
- 4.7 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 | 60°F | 36°F | 83°F 2004 | 23°F 1982 | 40% | 2% |
| May 2 | 61°F | 36°F | 80°F 1998 | 28°F 1964 | 40% | 2% |
| May 3 | 61°F | 37°F | 87°F 2018 | 25°F 1966 | 40% | 2% |
| May 4 | 62°F | 37°F | 91°F 2001 | 28°F 1985 | 40% | 1% |
| May 5 | 62°F | 37°F | 83°F 1960 | 27°F 1980 | 40% | 1% |
| May 6 | 63°F | 38°F | 84°F 1960 | 26°F 1961 | 40% | 1% |
| May 7 | 63°F | 38°F | 83°F 1964 | 21°F 1982 | 41% | 1% |
| May 8 | 63°F | 39°F | 84°F 1964 | 24°F 1966 | 41% | 1% |
| May 9 | 64°F | 39°F | 92°F 1979 | 21°F 1985 | 41% | 1% |
| May 10 | 64°F | 39°F | 92°F 1979 | 30°F 1986 | 41% | 1% |
| May 11 | 65°F | 40°F | 87°F 2007 | 28°F 2010 | 41% | 1% |
| May 12 | 65°F | 40°F | 85°F 1959 | 29°F 1962 | 42% | 1% |
| May 13 | 65°F | 40°F | 84°F 1991 | 22°F 1987 | 42% | 1% |
| May 14 | 66°F | 41°F | 88°F 1961 | 30°F 2020 | 42% | 1% |
| May 15 | 66°F | 41°F | 91°F 2022 | 26°F 1987 | 42% | 0% |
| May 16 | 66°F | 41°F | 87°F 2004 | 33°F 2013 | 42% | 0% |
| May 17 | 66°F | 42°F | 91°F 1977 | 31°F 1959 | 42% | 0% |
| May 18 | 67°F | 42°F | 88°F 1977 | 28°F 1981 | 43% | 0% |
| May 19 | 67°F | 42°F | 93°F 1962 | 28°F 1981 | 43% | 0% |
| May 20 | 67°F | 43°F | 89°F 2026 | 29°F 1991 | 43% | 0% |
| May 21 | 68°F | 43°F | 91°F 1992 | 30°F 1981 | 43% | 0% |
| May 22 | 68°F | 43°F | 98°F 1977 | 30°F 1991 | 43% | 0% |
| May 23 | 68°F | 43°F | 96°F 1977 | 35°F 1978 | 43% | 0% |
| May 24 | 68°F | 44°F | 96°F 1992 | 24°F 1985 | 43% | 0% |
| May 25 | 69°F | 44°F | 93°F 1977 | 34°F 1972 | 43% | 0% |
| May 26 | 69°F | 44°F | 92°F 2007 | 32°F 1972 | 43% | 0% |
| May 27 | 69°F | 45°F | 91°F 2021 | 30°F 1968 | 43% | 0% |
| May 28 | 69°F | 45°F | 91°F 1972 | 34°F 1986 | 43% | 0% |
| May 29 | 70°F | 45°F | 92°F 1978 | 34°F 1970 | 43% | 0% |
| May 30 | 70°F | 46°F | 91°F 1978 | 34°F 1967 | 43% | 0% |
| May 31 | 70°F | 46°F | 91°F 1987 | 33°F 1990 | 43% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- May 1
- sunrise 5:30 AM, sunset 7:44 PM
- May 31
- sunrise 4:59 AM, sunset 8:17 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00174745 (Livermore Falls 1 E), public domain. Records: NOAA GHCN-Daily, station USC00179151, 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.