Climate for Helena, Montana
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Average Temperatures for Helena
Helena's coldest month is January when the average temperature overnight is 9.9°F. In July, the warmest month, the average day time temperature rises to 83.4°F.
Average Rainfall for Helena
The driest month in Helena is February with 0.38 inches of precipitation, and with 1.82 inches June is the wettest month.
Monthly Sunshine Hours
Sunshine hours refers to the amount sunshine there is during the hours of daylight. A higher percentage means there is more sunshine through the day and a lower percentage will indicate that it is probably cloudier. Sunshine hours are important when you are planning your vacation.
I also found a good site to keep tabs on Montana Climate Change: http://www.montanaclimatechange.com/learn.php