May weather in Dayton, OH
The average temperature in Dayton in May is 63.9°F (52.9°F–74.9°F). Average precipitation: 4.38 inches.
May is a spring month in Dayton, and is warmer than the annual average of 53.3°F. Daily temperatures swing about 22°F between overnight low and afternoon high. Expect about 14 days with precipitation. Daylight averages about 14h 12m. For travel, May is a comfortable month to visit.
Avg High
74.9°F
Avg Low
52.9°F
Precipitation
4.38 in
Daylight
14h 12m
May records in Dayton
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 90.0°F (2007) | 30.0°F (1943) | 2.18 in (1983) |
| May 2 | 89.1°F (1959) | 32.0°F (1897) | 2.60 in (1985) |
| May 3 | 90.0°F (1899) | 34.0°F (1911) | 2.09 in (1997) |
| May 4 | 91.9°F (1949) | 28.0°F (1903) | 1.28 in (1977) |
| May 5 | 91.9°F (1949) | 30.0°F (1900) | 2.70 in (1990) |
| May 6 | 91.9°F (1949) | 33.1°F (1910) | 1.71 in (1971) |
| May 7 | 89.1°F (2015) | 32.0°F (1906) | 1.45 in (1916) |
| May 8 | 91.0°F (2015) | 30.0°F (2017) | 1.90 in (1998) |
| May 9 | 91.9°F (1896) | 28.9°F (2020) | 1.20 in (1972) |
| May 10 | 93.9°F (1896) | 30.0°F (1906) | 1.68 in (1909) |
| May 11 | 93.9°F (1896) | 28.0°F (1913) | 1.73 in (2003) |
| May 12 | 91.0°F (1999) | 34.0°F (2020) | 2.92 in (1918) |
| May 13 | 93.0°F (1999) | 34.0°F (1901) | 2.09 in (1993) |
| May 14 | 91.9°F (1962) | 35.1°F (1914) | 1.87 in (2009) |
| May 15 | 93.0°F (1998) | 32.0°F (1910) | 1.84 in (1894) |
| May 16 | 95.0°F (1998) | 32.0°F (1904) | 1.28 in (2007) |
| May 17 | 93.9°F (1962) | 33.1°F (1895) | 1.14 in (1938) |
| May 18 | 95.0°F (1962) | 35.1°F (1915) | 3.90 in (1991) |
| May 19 | 93.9°F (1962) | 34.0°F (1916) | 2.73 in (2020) |
| May 20 | 93.9°F (1998) | 37.0°F (1894) | 1.52 in (1938) |
| May 21 | 93.0°F (1977) | 32.0°F (1907) | 1.03 in (1901) |
| May 22 | 93.0°F (2021) | 35.1°F (1897) | 1.68 in (1903) |
| May 23 | 93.0°F (1921) | 36.0°F (2002) | 2.65 in (1989) |
| May 24 | 93.0°F (2021) | 39.0°F (1935) | 2.99 in (1968) |
| May 25 | 95.0°F (2020) | 39.9°F (1897) | 1.65 in (1939) |
| May 26 | 95.0°F (1911) | 37.0°F (1897) | 2.73 in (1989) |
| May 27 | 95.0°F (1911) | 36.0°F (1961) | 1.23 in (1962) |
| May 28 | 98.1°F (1911) | 33.1°F (1907) | 2.80 in (2004) |
| May 29 | 98.1°F (1911) | 35.1°F (1906) | 1.09 in (1967) |
| May 30 | 95.0°F (1895) | 39.9°F (1947) | 1.98 in (1905) |
| May 31 | 97.0°F (1895) | 36.0°F (1897) | 1.21 in (1972) |