Lewistown Weather in January
Average highs run from 34°F on January 1 to 34°F on January 31, and lows from 12°F to 13°F. Normal precipitation for the month is 0.58 in over about 8 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
- 34°F
- Average low
- 13°F
- Precipitation
- 0.58 in
- Snowfall
- 17.5 in
- Record high
- 73°FJan 22, 1981
- Record low
- -46°FJan 28, 1929
- Chance of a freeze
- 100%
- Daylight
- 8 h 35 min to 9 h 35 min
- Cloud cover
- 71%
- Humidity
- 82%
- Dew point
- 16°F
- Wind
- 12.5 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 | 34°F | 12°F | 55°F 1939 | -33°F 1942 | 25% | 21% |
| Jan 2 | 34°F | 12°F | 60°F 2012 | -29°F 1950 | 25% | 21% |
| Jan 3 | 34°F | 12°F | 56°F 1981 | -31°F 1950 | 25% | 21% |
| Jan 4 | 34°F | 12°F | 59°F 2012 | -26°F 2004 | 25% | 21% |
| Jan 5 | 34°F | 12°F | 57°F 2012 | -28°F 1909 | 25% | 22% |
| Jan 6 | 34°F | 13°F | 55°F 2006 | -26°F 1913 | 25% | 22% |
| Jan 7 | 34°F | 13°F | 68°F 2003 | -30°F 1937 | 25% | 22% |
| Jan 8 | 34°F | 13°F | 61°F 1958 | -33°F 1909 | 25% | 22% |
| Jan 9 | 34°F | 13°F | 60°F 1919 | -28°F 1909 | 25% | 22% |
| Jan 10 | 35°F | 13°F | 57°F 1941 | -37°F 1909 | 25% | 22% |
| Jan 11 | 35°F | 13°F | 61°F 1953 | -36°F 1916 | 25% | 22% |
| Jan 12 | 35°F | 13°F | 62°F 1987 | -42°F 2024 | 25% | 22% |
| Jan 13 | 35°F | 13°F | 60°F 1944 | -43°F 2024 | 25% | 22% |
| Jan 14 | 35°F | 13°F | 64°F 2026 | -34°F 1972 | 25% | 23% |
| Jan 15 | 35°F | 13°F | 60°F 1973 | -32°F 2024 | 25% | 23% |
| Jan 16 | 35°F | 13°F | 64°F 1974 | -31°F 1916 | 25% | 23% |
| Jan 17 | 35°F | 13°F | 56°F 1976 | -31°F 1950 | 25% | 23% |
| Jan 18 | 35°F | 13°F | 57°F 1921 | -31°F 1963 | 25% | 23% |
| Jan 19 | 35°F | 13°F | 60°F 1986 | -31°F 1954 | 25% | 23% |
| Jan 20 | 35°F | 13°F | 58°F 1981 | -32°F 1949 | 25% | 23% |
| Jan 21 | 35°F | 13°F | 61°F 1981 | -34°F 1927 | 25% | 23% |
| Jan 22 | 35°F | 13°F | 73°F 1981 | -27°F 1952 | 25% | 23% |
| Jan 23 | 35°F | 13°F | 64°F 2005 | -38°F 1929 | 25% | 23% |
| Jan 24 | 34°F | 13°F | 65°F 2005 | -34°F 1957 | 25% | 23% |
| Jan 25 | 34°F | 13°F | 65°F 2006 | -34°F 1957 | 25% | 23% |
| Jan 26 | 34°F | 13°F | 60°F 1906 | -28°F 1902 | 25% | 23% |
| Jan 27 | 34°F | 13°F | 61°F 2015 | -41°F 1916 | 25% | 23% |
| Jan 28 | 34°F | 13°F | 66°F 1941 | -46°F 1929 | 26% | 22% |
| Jan 29 | 34°F | 13°F | 64°F 1931 | -40°F 1929 | 26% | 22% |
| Jan 30 | 34°F | 13°F | 65°F 1941 | -33°F 1996 | 26% | 22% |
| Jan 31 | 34°F | 13°F | 65°F 2024 | -40°F 1917 | 26% | 22% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MST).
- January 1
- sunrise 8:04 AM, sunset 4:39 PM
- January 31
- sunrise 7:44 AM, sunset 5:19 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00024036 (Lewistown Muni AP), public domain. Records: NOAA GHCN-Daily, station USW00024036, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.