Musselshell County climate

Musselshell County Weather in January

NOAA 1991-2020 normals for Roundup, 12.2 km from Musselshell County

Average highs run from 36°F on January 1 to 38°F on January 31, and lows from 12°F to 14°F. Normal precipitation for the month is 0.37 in over about 4 wet days.

January day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Musselshell County, in °F, with the record for each date.-50-250255075151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

January at a glance

Average high
37°F
Average low
13°F
Precipitation
0.37 in
Snowfall
5.2 in
Record high
74°FJan 22, 1981
Record low
-40°FJan 24, 1969
Chance of a freeze
100%
Daylight
8 h 40 min to 9 h 39 min
Cloud cover
68%
Humidity
76%
Dew point
17°F
Wind
12.1 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.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Jan 136°F12°F63°F 1964-29°F 194215%12%
Jan 236°F12°F59°F 1962-28°F 196815%12%
Jan 336°F12°F61°F 1981-34°F 195015%12%
Jan 436°F12°F64°F 1984-24°F 195015%12%
Jan 536°F12°F60°F 1984-23°F 198215%12%
Jan 636°F12°F63°F 1954-26°F 196814%12%
Jan 737°F13°F72°F 2003-31°F 193714%12%
Jan 837°F13°F67°F 1958-28°F 193714%12%
Jan 937°F13°F60°F 1959-26°F 195714%12%
Jan 1037°F13°F66°F 1986-23°F 199314%12%
Jan 1137°F13°F65°F 1987-38°F 199714%11%
Jan 1237°F13°F68°F 1987-34°F 196314%11%
Jan 1337°F13°F66°F 1986-32°F 199714%11%
Jan 1437°F13°F66°F 2026-35°F 202414%11%
Jan 1537°F13°F65°F 1974-34°F 195014%11%
Jan 1637°F13°F65°F 1974-22°F 195413%11%
Jan 1737°F13°F65°F 1976-27°F 195013%11%
Jan 1837°F13°F58°F 1986-34°F 194313%11%
Jan 1938°F13°F64°F 1986-30°F 193513%11%
Jan 2038°F13°F67°F 1981-38°F 195413%11%
Jan 2138°F14°F70°F 1981-35°F 195413%10%
Jan 2238°F14°F74°F 1981-29°F 194313%10%
Jan 2338°F14°F69°F 1981-33°F 196913%10%
Jan 2438°F14°F67°F 1968-40°F 196913%10%
Jan 2538°F14°F67°F 2007-39°F 195712%10%
Jan 2638°F14°F69°F 2015-35°F 195712%10%
Jan 2738°F14°F64°F 2015-33°F 197212%10%
Jan 2838°F14°F70°F 1941-36°F 196912%10%
Jan 2938°F14°F65°F 1940-31°F 196912%10%
Jan 3038°F14°F69°F 1941-37°F 199612%10%
Jan 3138°F14°F69°F 1992-34°F 196912%10%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Musselshell County, in percent, and of at least 0.1 inch of snowfall.0510151102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (MST).

January 1
sunrise 7:57 AM, sunset 4:37 PM
January 31
sunrise 7:38 AM, sunset 5:17 PM

Every day of January: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00247214 (Roundup), public domain. Records: NOAA GHCN-Daily, station USC00243727, 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.