Blaine County Climate

Blaine County, Montana

JanFebMarAprMayJunJulAugSepOctNovDec43.0°AVG °F

Avg Annual Temp

43.0°F

Annual Precip

13.2"

Annual Snowfall

26.1"

Extreme Heat Days

22.28

days >= 90°F/yr

Monthly Temperature

54.4°F avgJFMAMJJASOND

Precipitation Calendar

Dry
Wet= snowfall
0.4"
0.4"
0.6"
1.0"
2.2"
2.9"
1.6"
1.1"
1.1"
0.9"
0.6"
0.4"
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Seasonal Overview

Comfort ZoneSpring31°53°3.8"Summer61°68°5.6"Fall31°57°2.6"Winter18°21°1.2"20°40°60°80°100°

National Comparison

Warmer than 7% of US counties
Wetter than 5% of US counties
More seasonal variation than 76% of US counties

Climate Profile

About Blaine County Weather

Northern Latitude Brings a Brisk Climate

Blaine County averages 43.0°F annually, placing it well below the median temperatures seen across the United States. Its position on the northern plains ensures a consistently cool environment.

Mirroring the Montana Average

The county's average temperature of 43.0°F sits right near the Montana state average of 43.7°F. It serves as a representative sample of the state's typical thermal profile.

Dry Conditions on the High Plains

With only 13.2 inches of annual precipitation, Blaine is drier than the state average of 15.4 inches. It shares this arid characteristic with many counties along the Hi-Line.

Sharp Temperature Swings Between Seasons

January averages a cold 18.2°F, while July heats up to 68.3°F. The county experiences 22 extreme heat days and accumulates about 26.1 inches of snow each year.

Plan for Arid Cold and Sun

Residents need high-quality winter layers for the 20.1°F winter average. Because of the 13.2 inches of annual rain, water-efficient landscaping is a smart choice for local homeowners.

Frequently Asked Questions

What is the average temperature in Blaine County?
The average annual temperature in Blaine County, MT is 43.0°F, based on NOAA 30-year climate normals (1991-2020).
How much rain does Blaine County get?
Blaine County receives an average of 13.2 inches of precipitation per year, including both rain and meltwater from snow. This is based on NOAA 30-year climate normals.
Does it snow in Blaine County?
Yes, Blaine County receives an average of 26.1 inches of snowfall per year according to NOAA climate normals.
How hot does Blaine County get in summer?
The average summer temperature (June-August) in Blaine County is 65.6°F. The county experiences an average of 22.28 days per year above 90°F.
How cold are winters in Blaine County?
The average winter temperature (December-February) in Blaine County is 20.1°F. January, typically the coldest month, averages 18.2°F.

Track your own weather in Blaine County

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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.

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