Great Falls, Montana is in the Northern and Western hemispheres, receiving all four seasons of Spring, Summer, Fall and Winter! It is normal for Great Falls, Montana to see snow from September to May, however, most snow falls November through April. Temperatures vary by season as well, with average highs and lows ranging. Great Falls receives 14.73 inches (374mm) of rain annually, with May and June getting the most rainfall. The wind is a great asset in Great Falls, and depending on the day, you may notice it. Wind turbines are visible in Great Falls and the surrounding area. The average wind speed is 11.3 miles per hour [18.19 kilometers per hour], with peaks of 58 mph [93 kph], all perfect for cooling off when it’s hot, and removing the snow when its cold.

Average Monthly Temperatures

°F Jan Feb Mar Apr May Jun July Aug Sept Oct Nov Dec
High 35 38 46 56 65 73 83 82 70 58 43 35
Low 15 16 23 31 39 46 51 50 42 33 23 15

 

°C Jan Feb Mar Apr May Jun July Aug Sept Oct Nov Dec
High 1.9 3.5 7.7 13.1 18.2 22.9 28.6 27.9 21.3 14.3 6.3 1.4
Low -9.5 -8.7 -5.2 -.8 3.7 7.8 10.8 10.2 5.6 .4 -4.8 -9.5