Helena
Montana, USA
Long term weather forecast
Long term weather forecast

October weather forecast and Climate
Helena, MT

  • Average high temperature in October: 58.7°F

Warmest month (with highest average high temperature) is July (85.7°F).
Month with lowest average high temperature is December (31.7°F).

  • Average low temperature in October: 32.5°F

Month with highest average low temperature is July (54.3°F).
Coldest month (with lowest average low temperature) is December (11.9°F).

  • Average humidity in October: 58.3%

Month with highest relative humidity is December (68.1%).
Month with lowest relative humidity is July (46.4%).

  • Average rainfall in October: 0.7"

Wettest month (with highest rainfall) is June (2.1").
Driest month (with lowest rainfall) is February (0.3").

  • Average rainfall days in October: 6.2 days

Month with highest number of rainy days is June (11.2 days).
Month with lowest number of rainy days is February (5.9 days).

  • Average snowfall in October: 2.4"

Month with highest snowfall is December (7.3").
Months with lowest snowfall are June and July (0").

  • Average snowfall days in October: 1.8 days

Month with highest number of snowfall days is December (6 days).
Month with lowest number of snowfall days is July (0 days).

  • Average daylight in October: 11h

Month with longest days is June (Average daylight: 16h).
Months with shortest days are January, November and December (Average daylight: 9h).

  • Average sunshine in October: 6.5h

Month with most sunshine is July (Average sunshine: 11.9h).
Month with least sunshine is December (Average sunshine: 3.2h).

  • Average UV index in October: 3

Month with highest UV index is July (UV index 9).
Months with lowest UV index are January, November and December (UV index 1).

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