Liberty County Climate
Liberty County, Montana
Avg Annual Temp
42.7°F
Annual Precip
11.1"
Annual Snowfall
35.9"
Extreme Heat Days
20.133333333333336
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Liberty County Weather
Dry and Cold Northern Plains Weather
Liberty County's annual average of 42.7°F is nearly 12 degrees colder than the national median, reflecting its position on the windy northern plains. The region is exceptionally dry, receiving only 11.1 inches of precipitation annually.
Cooler and Drier Than the State Median
Liberty County is colder than the 43.7°F state average and is one of Montana's more arid regions. It receives about 4 inches less precipitation annually than the typical Montana county.
Harsher Winters Than Its Southern Neighbors
With a January average of 18.0°F, Liberty County is much colder in winter than Lewis and Clark County's 24.7°F. It also faces more extreme heat, recording 20 days over 90°F compared to its mountain-shielded neighbors.
Wide Swings Between Deep Freeze and Heat
Winter is intense here, with a seasonal average of 20.1°F and 35.9 inches of snow. Conversely, July averages a warm 67.9°F, frequently pushing into the high 90s during the peak of summer.
Winterize for Cold and Conserve Water
Residents need heavy-duty insulation to combat the sub-20-degree January lows and wind chill. Because annual precipitation is so low at 11.1 inches, rainwater catchment and drought-resistant crops are highly recommended.
Frequently Asked Questions
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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.