May weather in Dewey Beach, DE
The average temperature in Dewey Beach in May is 65.3°F (56.0°F–74.6°F). Average precipitation: 3.38 inches.
May is a spring month in Dewey Beach, and is warmer than the annual average of 58.5°F. Daily temperatures swing about 18.6°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 14h 7m. For travel, May is one of the best months of the year to visit.
Avg High
74.6°F
Avg Low
56.0°F
Precipitation
3.38 in
Daylight
14h 7m
May records in Dewey Beach
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 89.1°F (1985) | 39.0°F (1945) | 0.91 in (2005) |
| May 2 | 91.0°F (1996) | 34.0°F (1978) | 1.63 in (2002) |
| May 3 | 88.0°F (2001) | 35.1°F (1966) | 1.30 in (1974) |
| May 4 | 90.0°F (1965) | 36.0°F (1986) | 1.91 in (1978) |
| May 5 | 91.9°F (1955) | 35.1°F (1966) | 1.44 in (1948) |
| May 6 | 90.0°F (1949) | 37.0°F (1954) | 1.11 in (1988) |
| May 7 | 91.0°F (1986) | 37.0°F (1970) | 1.64 in (1967) |
| May 8 | 93.0°F (2000) | 34.0°F (1947) | 1.59 in (1992) |
| May 9 | 93.0°F (1963) | 27.0°F (1947) | 1.13 in (2008) |
| May 10 | 89.1°F (1965) | 28.0°F (1947) | 1.21 in (1995) |
| May 11 | 89.1°F (1948) | 32.0°F (1947) | 0.56 in (1961) |
| May 12 | 90.0°F (1959) | 37.9°F (1962) | 2.79 in (2008) |
| May 13 | 93.0°F (1956) | 37.0°F (1963) | 1.68 in (1946) |
| May 14 | 89.1°F (1956) | 35.1°F (2001) | 1.32 in (1972) |
| May 15 | 90.0°F (1957) | 41.0°F (1965) | 0.98 in (1946) |
| May 16 | 88.0°F (1945) | 39.9°F (1959) | 2.03 in (1971) |
| May 17 | 91.9°F (1974) | 41.0°F (1956) | 2.53 in (1948) |
| May 18 | 93.9°F (1986) | 37.0°F (1955) | 1.34 in (1976) |
| May 19 | 97.0°F (1997) | 41.0°F (1976) | 1.36 in (1947) |
| May 20 | 95.0°F (1996) | 41.0°F (1948) | 3.71 in (2005) |
| May 21 | 93.9°F (1996) | 39.0°F (1950) | 2.03 in (1966) |
| May 22 | 93.9°F (1984) | 39.9°F (1965) | 1.71 in (2000) |
| May 23 | 93.9°F (2004) | 45.0°F (1946) | 1.00 in (1960) |
| May 24 | 93.0°F (1964) | 45.0°F (1945) | 2.06 in (1978) |
| May 25 | 91.9°F (1991) | 37.9°F (1956) | 0.95 in (1977) |
| May 26 | 93.0°F (1965) | 43.0°F (1949) | 2.37 in (1948) |
| May 27 | 95.0°F (1965) | 41.0°F (1961) | 1.40 in (1984) |
| May 28 | 89.1°F (1991) | 41.0°F (1961) | 1.43 in (2025) |
| May 29 | 93.0°F (1969) | 42.1°F (1953) | 2.10 in (1990) |
| May 30 | 95.0°F (1991) | 41.0°F (1949) | 4.04 in (1948) |
| May 31 | 93.9°F (1956) | 45.0°F (1947) | 1.80 in (1984) |