May weather in Spearfish, SD
The average temperature in Spearfish in May is 53.1°F (41.8°F–64.3°F). Average precipitation: 3.72 inches. Average snowfall is 2.3 inches.
May is a spring month in Spearfish, and is warmer than the annual average of 46.5°F. Daily temperatures swing about 22.5°F between overnight low and afternoon high. Expect about 12 days with precipitation. Daylight averages about 14h 36m. For travel, May is a comfortable month to visit.
Avg High
64.3°F
Avg Low
41.8°F
Precipitation
3.72 in
Snow
2.3 in
May records in Spearfish
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | 87.1°F (2001) | 10.9°F (1909) | 3.51 in (1946) |
| May 2 | 87.1°F (1952) | 19.0°F (1976) | 2.00 in (2008) |
| May 3 | 90.0°F (1952) | 14.0°F (1954) | 2.35 in (2008) |
| May 4 | 89.1°F (1936) | 10.0°F (1988) | 4.50 in (1905) |
| May 5 | 93.0°F (1936) | 21.0°F (1967) | 2.15 in (2007) |
| May 6 | 86.0°F (1911) | 26.1°F (1960) | 1.23 in (2012) |
| May 7 | 91.9°F (1934) | 23.0°F (1980) | 1.81 in (1995) |
| May 8 | 91.9°F (1934) | 19.0°F (1929) | 2.70 in (1995) |
| May 9 | 90.0°F (1934) | 24.1°F (1984) | 0.82 in (1988) |
| May 10 | 88.0°F (1961) | 25.0°F (1945) | 1.48 in (2010) |
| May 11 | 89.1°F (1940) | 12.9°F (1943) | 6.49 in (1922) |
| May 12 | 93.0°F (1900) | 16.0°F (1943) | 1.46 in (2023) |
| May 13 | 91.9°F (2001) | 21.0°F (1920) | 2.98 in (2023) |
| May 14 | 96.1°F (2001) | 23.0°F (1907) | 1.37 in (1970) |
| May 15 | 95.0°F (1936) | 28.9°F (1920) | 3.05 in (1982) |
| May 16 | 91.9°F (1978) | 21.0°F (1920) | 3.10 in (1982) |
| May 17 | 93.0°F (1893) | 28.9°F (1942) | 0.77 in (1942) |
| May 18 | 90.0°F (1988) | 28.0°F (1915) | 1.58 in (1962) |
| May 19 | 95.0°F (2009) | 28.9°F (1942) | 2.30 in (1902) |
| May 20 | 95.0°F (2009) | 27.0°F (1908) | 3.51 in (1982) |
| May 21 | 91.0°F (1964) | 19.0°F (1908) | 2.40 in (1899) |
| May 22 | 93.0°F (1980) | 26.1°F (1920) | 1.91 in (1962) |
| May 23 | 87.1°F (1931) | 28.0°F (1920) | 3.40 in (1933) |
| May 24 | 89.1°F (1929) | 28.0°F (1924) | 3.27 in (1907) |
| May 25 | 91.9°F (1931) | 30.0°F (1992) | 1.43 in (1907) |
| May 26 | 91.9°F (1934) | 25.0°F (1920) | 2.53 in (1929) |
| May 27 | 96.1°F (1969) | 28.0°F (1920) | 2.15 in (1973) |
| May 28 | 95.0°F (1934) | 28.0°F (1947) | 2.30 in (1956) |
| May 29 | 95.0°F (1934) | 21.9°F (1947) | 1.33 in (1909) |
| May 30 | 93.9°F (1939) | 30.9°F (1947) | 3.15 in (1946) |
| May 31 | 93.0°F (1933) | 30.0°F (1917) | 1.55 in (1909) |