August weather forecast and climate
Shelby, MT

Weather in August

August, the last month of the summer, in Shelby, is also a moderately hot month, with average temperature fluctuating between 58.3°F (14.6°C) and 79.9°F (26.6°C).

Temperature

In August, the average high-temperature is practically the same as in July - a still moderately hot 79.9°F (26.6°C). In August, in Shelby, the average low-temperature is 58.3°F (14.6°C).

Humidity

With an average relative humidity of 40%, August is the least humid month.

Rainfall

In Shelby, in August, during 6.9 rainfall days, 0.59" (15mm) of precipitation is typically accumulated. In Shelby, during the entire year, the rain falls for 84.2 days and collects up to 9.29" (236mm) of precipitation.

Snowfall

In Shelby snow does not fall in June through August.

Daylight

In Shelby, Montana, the average length of the day in August is 14.3h.

Sunshine

In August, the average sunshine is 11.3h.

UV index

The average daily maximum UV index in August is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from the exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the least humid month in Shelby?

August is the least humid month in Shelby, Montana, with an average relative humidity of 40%.

What is the average humidity in August in Shelby?

In Shelby, the average relative humidity in August is 40%.

How many days does it rain in August in Shelby?

In August, in Shelby, Montana, the rain falls for 6.9 days. Throughout August, 0.59" (15mm) of precipitation is accumulated.

When it does not snow in Shelby?

June through August are months without snowfall in Shelby.

Does it snow in Shelby in August?

In Shelby, Montana, in August, it doesn't snow. In September, it regularly snows.

What is the average length of the day in August in Shelby?

The average length of the day in August in Shelby, Montana, is 14.3h.

How many hours of sunshine does Shelby have in August?

The average sunshine in August is 11.3h.

What is the UV index intensity in August in Shelby?

In Shelby, the average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a medium health risk from the exposure to the Sun's UV radiation.

Average temperature in August
Shelby, MT

Average temperature in August - Shelby, MT
  • Average high temperature in August: 79.9°F

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is December (27.7°F).

  • Average low temperature in August: 58.3°F

The month with the highest average low temperature is August (58.3°F).
The coldest month (with the lowest average low temperature) is December (15.4°F).

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Average pressure in August
Shelby, MT

Average pressure in August - Shelby, MT
  • Average pressure in August: 29.91"

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is June (29.86").

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Average wind speed in August
Shelby, MT

Average wind speed in August - Shelby, MT
  • Average wind speed in August: 8.7mph

The windiest month (with the highest average wind speed) is April (11mph).
The calmest month (with the lowest average wind speed) is August (8.7mph).

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Average humidity in August
Shelby, MT

Average humidity in August - Shelby, MT
  • Average humidity in August: 40%

The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (40%).

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Average rainfall in August
Shelby, MT

Average rainfall in August - Shelby, MT
  • Average rainfall in August: 0.59"

The wettest month (with the highest rainfall) is June (2.01").
The driest months (with the least rainfall) are January and December (0.39").

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Average rainfall days in August
Shelby, MT

Average rainfall days in August - Shelby, MT
  • Average rainfall days in August: 6.9 days

The month with the highest number of rainy days is May (13.9 days).
The month with the least rainy days is February (3.1 days).

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Average snowfall in August
Shelby, MT

Average snowfall in August - Shelby, MT
  • Average snowfall in August: 0"

The month with the highest snowfall is February (4.17").
Months with the least snowfall are June, July and August (0").

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Average snowfall days in August
Shelby, MT

Average snowfall days in August - Shelby, MT
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (10.3 days).
Months with the least snowfall days are July and August (0 days).

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Average daylight in August /
Average sunshine in August
Shelby, MT

Average daylight in August / Average sunshine in August - Shelby, MT
  • Average daylight in August: 14.3h

The month with the longest days is June (Average daylight: 16.1h).
The month with the shortest days is December (Average daylight: 8.4h).

  • Average sunshine in August: 11.3h

The month with the most sunshine is July (Average sunshine: 11.9h).
The month with the least sunshine is January (Average sunshine: 5.4h).

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Average sunshine days in August
Shelby, MT

Average sunshine days in August - Shelby, MT
  • Average sunshine days in August: 22 days

The month with the most sunshine days is September (22.2 days).
The month with the least sunshine days is April (14.7 days).

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Average UV index in August
Shelby, MT

Average UV index in August - Shelby, MT
  • Average UV index in August: 5

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January, February, March, October, November and December (UV index 2).

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Average cloud cover in August
Shelby, MT

Average cloud cover in August - Shelby, MT
  • Average cloud cover in August: 17

The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 15).

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Average visibility in August
Shelby, MT

Average visibility in August - Shelby, MT
  • Average visibility in August: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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