March weather in Keystone, SD
The average temperature in Keystone in March is 34.8°F (25.4°F–44.2°F). Average precipitation: 1.35 inches. Average snowfall is 9.6 inches.
March is a spring month in Keystone, and is cooler than the annual average of 45.7°F. Daily temperatures swing about 18.8°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 11h 41m. For travel, March is cold.
Avg High
44.2°F
Avg Low
25.4°F
Precipitation
1.35 in
Snow
9.6 in
March records in Keystone
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| March 1 | 62.1°F (1986) | -16.1°F (2014) | 0.29 in (2014) |
| March 2 | 62.1°F (1974) | -14.1°F (2014) | 0.24 in (1985) |
| March 3 | 64.0°F (1992) | -11.9°F (2019) | 0.69 in (2023) |
| March 4 | 62.1°F (2000) | -9.0°F (1978) | 0.77 in (1992) |
| March 5 | 69.1°F (1987) | -5.1°F (1980) | 0.51 in (2022) |
| March 6 | 71.1°F (1987) | -5.1°F (1995) | 0.97 in (1990) |
| March 7 | 68.0°F (1987) | -4.0°F (1995) | 0.27 in (2019) |
| March 8 | 69.1°F (1977) | -7.1°F (2003) | 0.50 in (2000) |
| March 9 | 68.0°F (1977) | -7.1°F (2003) | 0.91 in (1970) |
| March 10 | 75.0°F (1972) | -7.1°F (1998) | 0.45 in (1977) |
| March 11 | 75.9°F (1972) | -8.0°F (1998) | 0.60 in (1977) |
| March 12 | 72.0°F (2007) | 7.0°F (1993) | 1.08 in (2006) |
| March 13 | 64.0°F (2007) | 1.9°F (1997) | 0.75 in (2019) |
| March 14 | 69.1°F (2003) | -2.9°F (1997) | 0.85 in (2021) |
| March 15 | 73.0°F (2015) | 3.0°F (1997) | 0.48 in (2021) |
| March 16 | 70.0°F (2012) | 3.9°F (2002) | 1.74 in (1963) |
| March 17 | 71.1°F (2012) | -6.0°F (1965) | 0.55 in (1971) |
| March 18 | 72.0°F (2017) | -11.9°F (1965) | 0.98 in (2003) |
| March 19 | 73.9°F (2026) | -8.0°F (1965) | 0.59 in (2006) |
| March 20 | 75.0°F (2026) | -2.9°F (1965) | 0.58 in (2006) |
| March 21 | 80.1°F (2026) | -5.1°F (1965) | 0.95 in (1987) |
| March 22 | 68.0°F (2009) | 0.0°F (1965) | 1.17 in (1973) |
| March 23 | 66.9°F (1963) | -7.1°F (1965) | 0.53 in (2009) |
| March 24 | 69.1°F (1963) | -9.0°F (1965) | 0.47 in (1996) |
| March 25 | 75.9°F (2026) | -8.0°F (1965) | 0.41 in (2016) |
| March 26 | 69.1°F (1963) | 3.0°F (1965) | 0.37 in (2018) |
| March 27 | 77.0°F (2025) | 3.0°F (1975) | 0.18 in (2011) |
| March 28 | 73.9°F (1986) | 1.9°F (1975) | 0.98 in (1998) |
| March 29 | 72.0°F (1978) | 0.0°F (1987) | 0.92 in (2007) |
| March 30 | 78.1°F (1968) | 5.0°F (1975) | 0.36 in (2009) |
| March 31 | 73.9°F (2012) | 9.0°F (2018) | 0.99 in (2023) |