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Great Falls, MT weather and climate

Cascade County, MT · population 60,412 · about 3,330 ft elevation

Everything below is a 30 year average for 1991-2020, computed from daily climate history at Great Falls's own coordinates.

The year at a glance

Sunny days
214
clear or partly cloudy, per year
Precipitation
16 in
per year
Wet days
99
rain or snow per year
Snowfall
67 in
per year
Hot days
24
above 90 °F
Freezing nights
147
at or below 32 °F
Humidity
57%
average relative
Average temperature
47 °F
year round

Monthly temperatures

Average daily high and low for each month, in °F.

Daily highDaily low
20406080JanMarMayJulSepNovDaily high, Jan: 37 °FDaily high, Feb: 38 °FDaily high, Mar: 48 °FDaily high, Apr: 58 °FDaily high, May: 67 °FDaily high, Jun: 75 °FDaily high, Jul: 85 °FDaily high, Aug: 84 °FDaily high, Sep: 72 °FDaily high, Oct: 59 °FDaily high, Nov: 45 °FDaily high, Dec: 37 °FDaily low, Jan: 17 °FDaily low, Feb: 18 °FDaily low, Mar: 25 °FDaily low, Apr: 33 °FDaily low, May: 42 °FDaily low, Jun: 49 °FDaily low, Jul: 55 °FDaily low, Aug: 53 °FDaily low, Sep: 45 °FDaily low, Oct: 35 °FDaily low, Nov: 26 °FDaily low, Dec: 19 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high373848586775858472594537
Daily low171825334249555345352619

Monthly precipitation

Total rain plus melted snow for each month, in inches.

0.01.02.03.0JanMarMayJulSepNovGreat Falls, Jan: 0.8 inGreat Falls, Feb: 0.7 inGreat Falls, Mar: 1.0 inGreat Falls, Apr: 2.0 inGreat Falls, May: 2.4 inGreat Falls, Jun: 2.9 inGreat Falls, Jul: 1.0 inGreat Falls, Aug: 1.1 inGreat Falls, Sep: 1.4 inGreat Falls, Oct: 1.3 inGreat Falls, Nov: 0.9 inGreat Falls, Dec: 0.8 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Great Falls0.80.71.02.02.42.91.01.11.41.30.90.8

Monthly sunny days

Days each month with clear or partly cloudy skies.

01020JanMarMayJulSepNovGreat Falls, Jan: 14 daysGreat Falls, Feb: 13 daysGreat Falls, Mar: 14 daysGreat Falls, Apr: 14 daysGreat Falls, May: 17 daysGreat Falls, Jun: 19 daysGreat Falls, Jul: 26 daysGreat Falls, Aug: 26 daysGreat Falls, Sep: 21 daysGreat Falls, Oct: 19 daysGreat Falls, Nov: 16 daysGreat Falls, Dec: 16 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Great Falls141314141719262621191616

Compare Great Falls with another city

Nearby cities and popular picks. Any two cities can be compared from the home page.

See weather for every covered Montana city

About this data

Figures are 30 year averages for 1991-2020. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).