March weather in Helena, MT
The average temperature in Helena in March is 36.1°F (24.6°F–47.5°F). Average precipitation: 0.52 inches. Average snowfall is 4.6 inches.
March is a spring month in Helena, and is cooler than the annual average of 45.5°F. Daily temperatures swing about 22.9°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 11h 40m. For travel, March is cool.
Avg High
47.5°F
Avg Low
24.6°F
Precipitation
0.52 in
Snow
4.6 in
March records in Helena
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| March 1 | 60.1°F (1992) | -11.9°F (2014) | 0.37 in (1955) |
| March 2 | 66.9°F (1994) | -15.0°F (1960) | 0.27 in (2024) |
| March 3 | 66.9°F (1987) | -20.0°F (1976) | 0.31 in (1998) |
| March 4 | 71.1°F (1987) | -29.7°F (2019) | 0.42 in (1980) |
| March 5 | 73.0°F (1987) | -26.9°F (2019) | 0.26 in (1990) |
| March 6 | 70.0°F (2020) | -18.9°F (1951) | 0.46 in (1969) |
| March 7 | 66.0°F (1986) | -24.0°F (1951) | 0.36 in (2003) |
| March 8 | 63.0°F (2004) | -26.0°F (1951) | 0.14 in (1958) |
| March 9 | 68.0°F (1972) | -18.0°F (1951) | 0.34 in (1958) |
| March 10 | 70.0°F (1983) | -24.0°F (1951) | 0.37 in (1967) |
| March 11 | 69.1°F (2005) | -16.1°F (1969) | 0.35 in (1967) |
| March 12 | 73.9°F (2007) | -11.9°F (1950) | 0.39 in (2005) |
| March 13 | 69.1°F (2003) | -14.1°F (1969) | 0.34 in (2026) |
| March 14 | 72.0°F (2015) | -9.0°F (1944) | 0.40 in (2026) |
| March 15 | 72.0°F (1994) | -4.0°F (1943) | 0.38 in (2018) |
| March 16 | 70.0°F (1994) | -8.0°F (1943) | 0.29 in (2009) |
| March 17 | 71.1°F (2007) | -8.0°F (1943) | 0.42 in (1968) |
| March 18 | 75.9°F (2017) | -13.0°F (1943) | 0.36 in (2006) |
| March 19 | 73.0°F (2026) | 5.0°F (1965) | 0.46 in (1987) |
| March 20 | 77.0°F (2026) | -2.0°F (1955) | 0.19 in (2002) |
| March 21 | 68.0°F (1986) | 1.0°F (2002) | 0.33 in (1964) |
| March 22 | 69.1°F (1939) | -0.9°F (1964) | 0.20 in (1955) |
| March 23 | 73.9°F (1993) | -9.9°F (1964) | 0.70 in (1945) |
| March 24 | 73.9°F (2007) | -24.0°F (1955) | 0.26 in (1952) |
| March 25 | 73.9°F (1999) | -29.9°F (1955) | 0.56 in (1952) |
| March 26 | 73.0°F (1978) | -22.0°F (1955) | 0.30 in (1981) |
| March 27 | 75.9°F (2015) | -11.0°F (1955) | 0.56 in (1979) |
| March 28 | 73.0°F (1986) | -2.9°F (1954) | 0.47 in (1982) |
| March 29 | 77.0°F (1978) | -9.9°F (1954) | 0.37 in (1967) |
| March 30 | 78.1°F (2004) | -6.0°F (1954) | 0.37 in (1947) |
| March 31 | 75.0°F (2015) | 10.0°F (1954) | 0.60 in (1940) |