Helena

The tables below display average monthly climate and weather indicators in Helena Montana.

Temperature by: Fahrenheit / Centigrade

Helena Temperature Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Avg. Temperature19.626.433.643.452.562.169.267.455.445.131.621.244.0
Avg. Max Temperature29.636.944.856.165.475.885.083.269.858.542.431.356.6
Avg. Min Temperature9.615.922.330.639.648.353.451.741.031.620.711.231.3
Days with Max Temp of 90 F or Higher0.00.00.00.0< 0.52.08.08.01.00.00.00.019.0
Days with Min Temp Below Freezing29.027.027.018.04.0< 0.50.0< 0.53.017.027.030.0182
 
Helena Heating and Cooling Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Heating Degree Days1407108197364838813734.065.0321617100213588031
Cooling Degree Days0.00.00.00.00.050.016413933.00.00.00.0386
 
Helena Precipitation Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Precipitation (inches)0.60.40.71.01.81.91.11.31.20.60.50.611.6
Days with Precipitation 0.01 inch or More8.06.08.08.011.011.08.08.06.06.07.08.096.0
Monthly Snowfall (inches)8.66.17.44.91.40.1< 0.050.11.52.36.48.347.1
 
Other Helena Weather Indicators Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Average Wind Speed6.77.38.29.18.88.57.87.47.47.17.16.77.7
Clear Days5.04.04.04.05.06.014.013.011.08.05.04.082.0
Partly Cloudy Days6.07.08.09.010.011.011.011.09.09.07.07.0104
Cloudy Days20.017.019.018.016.013.06.07.011.014.018.020.0179
Percent of Possible Sunshine46.055.061.059.060.064.078.074.067.060.044.042.059.0
Avg. Relative Humidity52.568.563.558.555.556.053.049.551.054.559.066.069.0

Weather information for other cities in Montana

Portions of this site are based on the CIA World Fact Book, a public-domain work
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