May weather in Eureka, SD
The average temperature in Eureka in May is 54.5°F (42.2°F–66.7°F). Average precipitation: 3.18 inches.
May is a spring month in Eureka, and is warmer than the annual average of 41.8°F. Daily temperatures swing about 24.5°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 14h 44m. For travel, May is a comfortable month to visit.
Avg High
66.7°F
Avg Low
42.2°F
Precipitation
3.18 in
Daylight
14h 44m
May records in Eureka
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 91.9°F (1959) | 17.1°F (1909) | 2.00 in (1972) |
| May 2 | 88.0°F (1955) | 12.0°F (1967) | 1.38 in (1950) |
| May 3 | 91.0°F (1982) | 19.9°F (1954) | 1.64 in (1964) |
| May 4 | 93.9°F (1926) | 19.9°F (1954) | 1.72 in (2003) |
| May 5 | 93.9°F (1926) | 19.0°F (1944) | 1.62 in (2020) |
| May 6 | 89.1°F (1916) | 19.9°F (1929) | 0.61 in (1968) |
| May 7 | 91.9°F (1934) | 19.0°F (1929) | 1.45 in (2023) |
| May 8 | 102.9°F (1934) | 19.0°F (1943) | 1.35 in (1995) |
| May 9 | 98.1°F (1934) | 19.9°F (1966) | 2.06 in (1986) |
| May 10 | 91.9°F (1987) | 23.0°F (1981) | 1.36 in (1999) |
| May 11 | 89.1°F (1958) | 19.0°F (1946) | 1.62 in (2015) |
| May 12 | 91.9°F (2025) | 18.0°F (1946) | 1.48 in (1978) |
| May 13 | 95.0°F (2025) | 12.0°F (1943) | 1.78 in (1958) |
| May 14 | 93.0°F (1911) | 23.0°F (1959) | 1.00 in (1970) |
| May 15 | 93.9°F (1987) | 21.9°F (1959) | 1.62 in (1991) |
| May 16 | 100.0°F (1934) | 25.0°F (1929) | 0.93 in (2025) |
| May 17 | 102.9°F (1934) | 23.0°F (1925) | 1.10 in (1942) |
| May 18 | 98.1°F (1934) | 21.9°F (1915) | 3.96 in (2018) |
| May 19 | 98.1°F (1992) | 28.0°F (1915) | 1.26 in (2013) |
| May 20 | 98.1°F (1992) | 23.0°F (1929) | 1.33 in (1957) |
| May 21 | 93.9°F (1964) | 23.0°F (1963) | 1.02 in (1987) |
| May 22 | 91.0°F (1966) | 21.9°F (1924) | 2.16 in (1991) |
| May 23 | 91.0°F (1928) | 27.0°F (1917) | 1.98 in (1971) |
| May 24 | 98.1°F (1926) | 18.0°F (1924) | 1.59 in (1965) |
| May 25 | 93.9°F (1941) | 21.9°F (1924) | 1.42 in (1957) |
| May 26 | 91.0°F (1934) | 28.9°F (1947) | 2.87 in (1932) |
| May 27 | 104.0°F (1934) | 25.0°F (1917) | 1.51 in (1931) |
| May 28 | 107.1°F (1934) | 28.9°F (1965) | 1.12 in (1959) |
| May 29 | 100.0°F (1934) | 21.9°F (1947) | 0.89 in (1949) |
| May 30 | 107.1°F (1934) | 28.9°F (1947) | 3.54 in (1942) |
| May 31 | 100.0°F (1934) | 32.0°F (1964) | 1.71 in (1949) |