Sweet Grass County Weather in March
Average highs run from 44°F on March 1 to 54°F on March 31, and lows from 21°F to 30°F. Normal precipitation for the month is 0.98 in over about 6 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
- 49°F
- Average low
- 26°F
- Precipitation
- 0.98 in
- Snowfall
- 9.1 in
- Record high
- 80°FMar 20, 2026
- Record low
- -32°FMar 4, 2019
- Chance of a freeze
- 100%
- Daylight
- 11 h 09 min to 12 h 46 min
- Cloud cover
- 70%
- Humidity
- 73%
- Dew point
- 21°F
- Wind
- 11.0 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 | 44°F | 21°F | 78°F 1910 | -13°F 2014 | 17% | 10% |
| Mar 2 | 44°F | 22°F | 68°F 1926 | -20°F 1930 | 17% | 9% |
| Mar 3 | 45°F | 22°F | 74°F 1921 | -27°F 2019 | 17% | 9% |
| Mar 4 | 45°F | 22°F | 74°F 1910 | -32°F 2019 | 17% | 9% |
| Mar 5 | 45°F | 23°F | 74°F 1910 | -23°F 2019 | 18% | 9% |
| Mar 6 | 46°F | 23°F | 70°F 2020 | -30°F 1920 | 18% | 9% |
| Mar 7 | 46°F | 23°F | 67°F 1910 | -13°F 1951 | 18% | 9% |
| Mar 8 | 47°F | 24°F | 67°F 1910 | -30°F 1932 | 18% | 9% |
| Mar 9 | 47°F | 24°F | 74°F 1972 | -30°F 1932 | 18% | 9% |
| Mar 10 | 47°F | 24°F | 72°F 1910 | -30°F 1932 | 18% | 8% |
| Mar 11 | 48°F | 25°F | 70°F 1916 | -29°F 1932 | 18% | 8% |
| Mar 12 | 48°F | 25°F | 74°F 2007 | -18°F 1932 | 19% | 8% |
| Mar 13 | 49°F | 25°F | 71°F 2003 | -7°F 1917 | 19% | 8% |
| Mar 14 | 49°F | 26°F | 72°F 2015 | -14°F 1997 | 19% | 8% |
| Mar 15 | 49°F | 26°F | 72°F 2017 | -20°F 1897 | 19% | 8% |
| Mar 16 | 50°F | 26°F | 74°F 1926 | -16°F 1943 | 19% | 8% |
| Mar 17 | 50°F | 27°F | 72°F 2007 | -13°F 1943 | 20% | 7% |
| Mar 18 | 50°F | 27°F | 77°F 2017 | -20°F 1943 | 20% | 7% |
| Mar 19 | 51°F | 27°F | 79°F 2026 | -3°F 1927 | 20% | 7% |
| Mar 20 | 51°F | 27°F | 80°F 2026 | -8°F 1913 | 21% | 7% |
| Mar 21 | 51°F | 28°F | 79°F 1928 | -23°F 1913 | 21% | 7% |
| Mar 22 | 52°F | 28°F | 80°F 1928 | -23°F 1898 | 21% | 7% |
| Mar 23 | 52°F | 28°F | 73°F 1993 | -15°F 1964 | 22% | 7% |
| Mar 24 | 52°F | 29°F | 74°F 1956 | -19°F 1965 | 22% | 6% |
| Mar 25 | 52°F | 29°F | 75°F 1956 | -22°F 1965 | 22% | 6% |
| Mar 26 | 53°F | 29°F | 74°F 1960 | -17°F 1913 | 23% | 6% |
| Mar 27 | 53°F | 29°F | 74°F 1946 | -9°F 1965 | 23% | 6% |
| Mar 28 | 53°F | 30°F | 76°F 1986 | -2°F 1931 | 23% | 6% |
| Mar 29 | 53°F | 30°F | 76°F 1978 | -11°F 1954 | 24% | 6% |
| Mar 30 | 54°F | 30°F | 77°F 1978 | -12°F 1936 | 24% | 6% |
| Mar 31 | 54°F | 30°F | 76°F 2004 | 0°F 1936 | 24% | 6% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MDT).
- March 1
- sunrise 6:58 AM, sunset 6:07 PM
- March 31
- sunrise 7:01 AM, sunset 7:47 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00240780 (Big Timber), public domain. Records: NOAA GHCN-Daily, station USC00240780, 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.