Helena Guide
For foreign visitors
Helena weather essentials
Month
High
Low
Precip
Apr
68°F 20°C
49°F 9°C
4 in 10 cm
May
76°F 24°C
57°F 13°C
5 in 13 cm
Jun
82°F 27°C
65°F 18°C
3 in 7 cm
Jul
85°F 29°C
68°F 20°C
3 in 8 cm
Aug
85°F 29°C
67°F 19°C
3 in 7 cm
Sep
80°F 26°C
60°F 15°C
3 in 7 cm
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