Great Falls
Montana, USA
Long-term weather forecast
Long-term weather forecast
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August weather forecast and Climate
Great Falls, MT

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  • The average high temperature in August: 82.3°F

The warmest month (with the highest average high temperature) is July (83.4°F).
The month with the lowest average high temperature is December (34.6°F).

  • The average low temperature in August: 50.4°F

The month with the highest average low temperature is July (51.4°F).
Coldest months (with the lowest average low temperature) are January and December (14.9°F).

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  • The average rainfall in August: 1.6"

The wettest month (with the highest rainfall) is June (2.5").
Driest months (with the lowest rainfall) are January and February (0.5").

  • The average rainfall days in August: 7.9 days

Months with the highest number of rainy days are May and June (11.7 days).
The month with the lowest number of rainy days is October (6.6 days).

  • The average snowfall in August: 0.3"

The month with the highest snowfall is March (11.9").
The month with the lowest snowfall is July (0").

  • The average snowfall days in August: 0.1 days

The month with the highest number of snowfall days is March (7.8 days).
The month with the lowest number of snowfall days is July (0 days).

  • The average daylight in August: 14h

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

  • The average sunshine in August: 10.7h

The month with most sunshine is July (Average sunshine: 12.2h).
The month with least sunshine is December (Average sunshine: 3.4h).

  • The average UV index in August: 7

Months with the highest UV index are June and July (UV index 8).
Months with the lowest UV index are January, November and December (UV index 1).

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