Great Falls Weather in January
Average highs run from 37°F on January 1 to 37°F on January 31, and lows from 18°F to 17°F. Normal precipitation for the month is 0.61 in over about 6 wet days.
January day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
January at a glance
- Average high
- 37°F
- Average low
- 18°F
- Precipitation
- 0.61 in
- Snowfall
- 9.2 in
- Record high
- 67°FJan 26, 2015
- Record low
- -37°FJan 23, 1969
- Chance of a freeze
- 100%
- Daylight
- 8 h 32 min to 9 h 32 min
- Cloud cover
- 71%
- Humidity
- 80%
- Dew point
- 18°F
- Wind
- 11.9 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 |
|---|---|---|---|---|---|---|
| Jan 1 | 37°F | 18°F | 61°F 1964 | -27°F 2018 | 21% | 25% |
| Jan 2 | 37°F | 18°F | 56°F 1939 | -32°F 1950 | 21% | 25% |
| Jan 3 | 37°F | 18°F | 58°F 2026 | -33°F 1950 | 21% | 25% |
| Jan 4 | 37°F | 18°F | 59°F 2012 | -28°F 1982 | 21% | 25% |
| Jan 5 | 37°F | 18°F | 56°F 2001 | -30°F 1982 | 21% | 25% |
| Jan 6 | 37°F | 18°F | 56°F 1948 | -26°F 1982 | 21% | 25% |
| Jan 7 | 37°F | 18°F | 61°F 2003 | -17°F 1965 | 21% | 25% |
| Jan 8 | 37°F | 18°F | 55°F 1958 | -24°F 1962 | 21% | 25% |
| Jan 9 | 37°F | 18°F | 61°F 1953 | -25°F 1962 | 22% | 25% |
| Jan 10 | 37°F | 18°F | 57°F 1941 | -30°F 1980 | 22% | 25% |
| Jan 11 | 37°F | 18°F | 62°F 1953 | -29°F 1998 | 21% | 25% |
| Jan 12 | 37°F | 18°F | 62°F 1959 | -36°F 2024 | 21% | 25% |
| Jan 13 | 37°F | 18°F | 62°F 2026 | -37°F 2024 | 21% | 25% |
| Jan 14 | 37°F | 18°F | 64°F 2026 | -31°F 1972 | 22% | 25% |
| Jan 15 | 37°F | 17°F | 60°F 1973 | -32°F 2024 | 22% | 25% |
| Jan 16 | 37°F | 17°F | 58°F 1973 | -22°F 1954 | 22% | 25% |
| Jan 17 | 37°F | 17°F | 58°F 2014 | -27°F 1950 | 22% | 25% |
| Jan 18 | 37°F | 17°F | 56°F 1986 | -23°F 1963 | 22% | 25% |
| Jan 19 | 37°F | 17°F | 61°F 1986 | -25°F 1962 | 22% | 25% |
| Jan 20 | 37°F | 17°F | 60°F 1981 | -33°F 1954 | 22% | 25% |
| Jan 21 | 37°F | 17°F | 57°F 1994 | -32°F 1943 | 22% | 25% |
| Jan 22 | 37°F | 17°F | 62°F 1981 | -32°F 1943 | 23% | 25% |
| Jan 23 | 37°F | 17°F | 63°F 2005 | -37°F 1969 | 23% | 25% |
| Jan 24 | 37°F | 17°F | 61°F 1968 | -28°F 1943 | 23% | 25% |
| Jan 25 | 37°F | 17°F | 62°F 2006 | -31°F 1957 | 23% | 25% |
| Jan 26 | 37°F | 17°F | 67°F 2015 | -28°F 1969 | 23% | 25% |
| Jan 27 | 37°F | 17°F | 64°F 2015 | -32°F 1972 | 23% | 25% |
| Jan 28 | 37°F | 17°F | 59°F 1941 | -28°F 1969 | 24% | 25% |
| Jan 29 | 37°F | 17°F | 62°F 2024 | -33°F 1996 | 24% | 25% |
| Jan 30 | 37°F | 17°F | 64°F 2024 | -33°F 1996 | 24% | 25% |
| Jan 31 | 37°F | 17°F | 67°F 1992 | -32°F 1969 | 25% | 26% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MST).
- January 1
- sunrise 8:13 AM, sunset 4:45 PM
- January 31
- sunrise 7:53 AM, sunset 5:25 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00243749 (Great Falls 16ST), public domain. Records: NOAA GHCN-Daily, station USW00024143, 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.