Dayton Weather in May
Average highs run from 59°F on May 1 to 69°F on May 31, and lows from 39°F to 48°F. Normal precipitation for the month is 0.74 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
- 64°F
- Average low
- 44°F
- Precipitation
- 0.74 in
- Snowfall
- 0.7 in
- Record high
- 94°FMay 17, 2008
- Record low
- 18°FMay 1, 1967
- Chance of a freeze
- 68%
- Daylight
- 13 h 52 min to 14 h 44 min
- Cloud cover
- 47%
- Humidity
- 47%
- Dew point
- 31°F
- Wind
- 7.4 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 | 59°F | 39°F | 89°F 1947 | 18°F 1967 | 9% | 2% |
| May 2 | 59°F | 40°F | 89°F 1947 | 22°F 1902 | 9% | 2% |
| May 3 | 60°F | 40°F | 85°F 1925 | 19°F 1933 | 9% | 2% |
| May 4 | 60°F | 40°F | 85°F 1925 | 25°F 1959 | 9% | 2% |
| May 5 | 60°F | 41°F | 87°F 1947 | 25°F 1938 | 9% | 2% |
| May 6 | 61°F | 41°F | 87°F 1925 | 20°F 1933 | 10% | 2% |
| May 7 | 61°F | 41°F | 87°F 1992 | 22°F 1950 | 10% | 2% |
| May 8 | 61°F | 42°F | 87°F 1954 | 24°F 1950 | 10% | 2% |
| May 9 | 62°F | 42°F | 85°F 1924 | 22°F 1948 | 10% | 2% |
| May 10 | 62°F | 42°F | 90°F 1934 | 22°F 1896 | 10% | 2% |
| May 11 | 62°F | 43°F | 87°F 1996 | 20°F 2000 | 10% | 2% |
| May 12 | 63°F | 43°F | 87°F 1996 | 24°F 1953 | 10% | 2% |
| May 13 | 63°F | 43°F | 91°F 1927 | 24°F 1943 | 10% | 2% |
| May 14 | 63°F | 44°F | 89°F 1927 | 25°F 1967 | 10% | 1% |
| May 15 | 64°F | 44°F | 92°F 1927 | 23°F 1990 | 10% | 1% |
| May 16 | 64°F | 44°F | 90°F 1924 | 20°F 1894 | 10% | 1% |
| May 17 | 64°F | 45°F | 94°F 2008 | 26°F 1906 | 10% | 1% |
| May 18 | 65°F | 45°F | 94°F 2008 | 19°F 1974 | 10% | 1% |
| May 19 | 65°F | 45°F | 92°F 1954 | 22°F 1933 | 10% | 1% |
| May 20 | 65°F | 45°F | 90°F 1924 | 21°F 1974 | 10% | 1% |
| May 21 | 66°F | 46°F | 91°F 1947 | 26°F 1927 | 10% | 1% |
| May 22 | 66°F | 46°F | 89°F 1967 | 24°F 1960 | 10% | 1% |
| May 23 | 66°F | 46°F | 89°F 2000 | 26°F 1960 | 10% | 1% |
| May 24 | 67°F | 47°F | 90°F 1924 | 28°F 1939 | 10% | 1% |
| May 25 | 67°F | 47°F | 90°F 1983 | 24°F 1978 | 10% | 1% |
| May 26 | 67°F | 47°F | 92°F 1951 | 27°F 1980 | 10% | 1% |
| May 27 | 68°F | 47°F | 93°F 1951 | 26°F 1929 | 10% | 1% |
| May 28 | 68°F | 48°F | 93°F 1984 | 27°F 1929 | 10% | 1% |
| May 29 | 68°F | 48°F | 93°F 1986 | 26°F 1895 | 10% | 1% |
| May 30 | 68°F | 48°F | 93°F 2020 | 27°F 1899 | 10% | 1% |
| May 31 | 69°F | 48°F | 93°F 1986 | 22°F 1990 | 9% | 1% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- May 1
- sunrise 6:00 AM, sunset 7:52 PM
- May 31
- sunrise 5:34 AM, sunset 8:18 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00268761 (Virginia City), public domain. Records: NOAA GHCN-Daily, station USC00261485, 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.