Helena Weather in March
Average highs run from 42°F on March 1 to 53°F on March 31, and lows from 20°F to 29°F. Normal precipitation for the month is 0.52 in over about 7 wet days.
March day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
March at a glance
- Average high
- 48°F
- Average low
- 25°F
- Precipitation
- 0.52 in
- Snowfall
- 4.6 in
- Record high
- 78°FMar 30, 2004
- Record low
- -30°FMar 25, 1955
- Chance of a freeze
- 100%
- Daylight
- 11 h 07 min to 12 h 47 min
- Cloud cover
- 71%
- Humidity
- 76%
- Dew point
- 22°F
- Wind
- 7.2 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Mar 1 | 42°F | 20°F | 60°F 1992 | -12°F 2014 | 23% | 16% |
| Mar 2 | 42°F | 20°F | 67°F 1994 | -15°F 1960 | 23% | 16% |
| Mar 3 | 43°F | 21°F | 67°F 1987 | -20°F 1976 | 23% | 15% |
| Mar 4 | 43°F | 21°F | 71°F 1987 | -30°F 2019 | 23% | 15% |
| Mar 5 | 43°F | 21°F | 73°F 1987 | -27°F 2019 | 23% | 15% |
| Mar 6 | 44°F | 22°F | 70°F 2020 | -19°F 1951 | 23% | 15% |
| Mar 7 | 44°F | 22°F | 66°F 1986 | -24°F 1951 | 23% | 14% |
| Mar 8 | 45°F | 22°F | 63°F 2004 | -26°F 1951 | 23% | 14% |
| Mar 9 | 45°F | 23°F | 68°F 1972 | -18°F 1951 | 23% | 14% |
| Mar 10 | 45°F | 23°F | 70°F 1983 | -24°F 1951 | 23% | 13% |
| Mar 11 | 46°F | 23°F | 69°F 2005 | -16°F 1969 | 23% | 13% |
| Mar 12 | 46°F | 23°F | 74°F 2007 | -12°F 1950 | 23% | 13% |
| Mar 13 | 47°F | 24°F | 69°F 2003 | -14°F 1969 | 23% | 13% |
| Mar 14 | 47°F | 24°F | 72°F 2015 | -9°F 1944 | 23% | 13% |
| Mar 15 | 47°F | 24°F | 72°F 1994 | -4°F 1943 | 23% | 13% |
| Mar 16 | 48°F | 25°F | 70°F 1994 | -8°F 1943 | 23% | 12% |
| Mar 17 | 48°F | 25°F | 71°F 2007 | -8°F 1943 | 23% | 12% |
| Mar 18 | 49°F | 25°F | 76°F 2017 | -13°F 1943 | 23% | 12% |
| Mar 19 | 49°F | 26°F | 73°F 2026 | 5°F 1965 | 24% | 12% |
| Mar 20 | 49°F | 26°F | 77°F 2026 | -2°F 1955 | 24% | 12% |
| Mar 21 | 50°F | 26°F | 68°F 1986 | 1°F 2002 | 24% | 11% |
| Mar 22 | 50°F | 27°F | 69°F 1939 | -1°F 1964 | 24% | 11% |
| Mar 23 | 50°F | 27°F | 74°F 1993 | -10°F 1964 | 24% | 11% |
| Mar 24 | 51°F | 27°F | 74°F 2007 | -24°F 1955 | 24% | 11% |
| Mar 25 | 51°F | 27°F | 74°F 1999 | -30°F 1955 | 24% | 11% |
| Mar 26 | 51°F | 28°F | 73°F 1978 | -22°F 1955 | 24% | 11% |
| Mar 27 | 51°F | 28°F | 76°F 2015 | -11°F 1955 | 25% | 10% |
| Mar 28 | 52°F | 28°F | 73°F 1986 | -3°F 1954 | 25% | 10% |
| Mar 29 | 52°F | 28°F | 77°F 1978 | -10°F 1954 | 25% | 10% |
| Mar 30 | 52°F | 29°F | 78°F 2004 | -6°F 1954 | 25% | 10% |
| Mar 31 | 53°F | 29°F | 75°F 2015 | 10°F 1954 | 25% | 10% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MDT).
- March 1
- sunrise 7:07 AM, sunset 6:14 PM
- March 31
- sunrise 7:09 AM, sunset 7:56 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00024144 (Helena Rgnl AP), public domain. Records: NOAA GHCN-Daily, station USW00024144, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.