Dayton Weather in May
Average highs run from 70°F on May 1 to 77°F on May 31, and lows from 45°F to 56°F. Normal precipitation for the month is 4.02 in over about 14 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
- 74°F
- Average low
- 50°F
- Precipitation
- 4.02 in
- Record high
- 97°FMay 27, 1914
- Record low
- 24°FMay 3, 1911
- Chance of a freeze
- 23%
- Days of 90°F or more
- 0.6
- Daylight
- 13 h 49 min to 14 h 39 min
- Cloud cover
- 65%
- Humidity
- 77%
- Dew point
- 53°F
- Wind
- 5.6 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 | 70°F | 45°F | 92°F 1942 | 30°F 1927 | 45% | 0% |
| May 2 | 70°F | 45°F | 88°F 1901 | 27°F 1943 | 45% | 0% |
| May 3 | 71°F | 46°F | 89°F 1913 | 24°F 1911 | 46% | 0% |
| May 4 | 71°F | 46°F | 89°F 1905 | 27°F 1900 | 46% | 0% |
| May 5 | 71°F | 46°F | 94°F 1902 | 28°F 1957 | 46% | 0% |
| May 6 | 71°F | 47°F | 90°F 1943 | 27°F 1910 | 46% | 0% |
| May 7 | 71°F | 47°F | 90°F 1930 | 28°F 1970 | 45% | 0% |
| May 8 | 72°F | 48°F | 91°F 1936 | 29°F 1906 | 45% | 0% |
| May 9 | 72°F | 48°F | 94°F 1963 | 25°F 1947 | 45% | 0% |
| May 10 | 72°F | 48°F | 92°F 1963 | 26°F 1947 | 45% | 0% |
| May 11 | 72°F | 49°F | 91°F 1896 | 28°F 1906 | 45% | 0% |
| May 12 | 73°F | 49°F | 91°F 1911 | 27°F 1913 | 45% | 0% |
| May 13 | 73°F | 49°F | 92°F 1900 | 31°F 1910 | 45% | 0% |
| May 14 | 73°F | 50°F | 92°F 1900 | 28°F 1910 | 45% | 0% |
| May 15 | 73°F | 50°F | 92°F 1900 | 26°F 1910 | 45% | 0% |
| May 16 | 73°F | 50°F | 93°F 1899 | 30°F 1910 | 45% | 0% |
| May 17 | 74°F | 51°F | 93°F 1911 | 29°F 1895 | 45% | 0% |
| May 18 | 74°F | 51°F | 94°F 1911 | 31°F 1973 | 45% | 0% |
| May 19 | 74°F | 51°F | 93°F 1911 | 32°F 1893 | 45% | 0% |
| May 20 | 74°F | 52°F | 94°F 2026 | 31°F 2002 | 45% | 0% |
| May 21 | 75°F | 52°F | 93°F 1941 | 32°F 1907 | 44% | 0% |
| May 22 | 75°F | 53°F | 93°F 1941 | 28°F 2002 | 44% | 0% |
| May 23 | 75°F | 53°F | 94°F 1911 | 32°F 2002 | 44% | 0% |
| May 24 | 75°F | 53°F | 90°F 1911 | 32°F 1963 | 44% | 0% |
| May 25 | 76°F | 54°F | 91°F 1911 | 31°F 1956 | 44% | 0% |
| May 26 | 76°F | 54°F | 94°F 1914 | 34°F 1988 | 44% | 0% |
| May 27 | 76°F | 54°F | 97°F 1914 | 31°F 1925 | 44% | 0% |
| May 28 | 76°F | 55°F | 97°F 1914 | 30°F 1907 | 44% | 0% |
| May 29 | 77°F | 55°F | 93°F 1911 | 34°F 1894 | 44% | 0% |
| May 30 | 77°F | 55°F | 96°F 2011 | 35°F 1932 | 44% | 0% |
| May 31 | 77°F | 56°F | 96°F 1991 | 34°F 1984 | 44% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- May 1
- sunrise 6:19 AM, sunset 8:08 PM
- May 31
- sunrise 5:54 AM, sunset 8:33 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00442208 (Dale Enterprise), public domain. Records: NOAA GHCN-Daily, station USC00442208, 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.