August weather forecast
Shelby, MT

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Weather in August

August in Shelby, Montana, sees a slight dip in high temperatures from July, but the weather remains relatively warm at 79.9°F (26.6°C) on average. The summer heat persists, but relief arrives in the form of late afternoon rain showers. Although the cloud cover increases towards the end of the month, there are still plenty of sunshine hours for outdoor activities. It also marks the transition to autumn, with leaves starting to display the first hints of fall colors. The residents anticipate the upcoming cooler weather and the festivities it brings with it.

Temperature

August's advent in Shelby presents an average high-temperature of a still warm 79.9°F (26.6°C), indicating a slight variation from the conditions of the previous month. Against the backdrop of high daytime temperatures, an average low-temperature of 58.3°F (14.6°C) is noted during August nights.

Humidity

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

Rainfall

In Shelby, during August, the rain falls for 6.9 days and regularly aggregates up to 0.59" (15mm) of precipitation. In Shelby, Montana, 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

The average length of the day in August is 14h and 17min.
On the first day of August, sunrise is at 6:03 am and sunset at 9:04 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 8:10 pm MDT.

Sunshine

In Shelby, the average sunshine in August is 11.3h.

UV index

In August, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.
Note: A maximum high daily UV index of 5 during August translates into the following directions:
Undertake precautions - It is suggested to shield oneself from sunburn. When the Sun is at its strongest around midday, find shade and limit exposure. Always opt for UVA and UVB-resistant sunglasses on radiant days.
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Frequently asked questions

What are the temperatures in Shelby in August?

The high-temperature during August is 79.9°F (26.6°C) and the low-temperature is 58.3°F (14.6°C). In July, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines air temperature and relative humidity, is appraised at 80.6°F (27°C).

What is the least humid month in Shelby?

The least humid month in Shelby is August, 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 much does it rain in Shelby in August?

In August, in Shelby, 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, Montana.

Does it snow in Shelby in August?

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

How many hours of daylight does Shelby have in August?

In Shelby, the average day length in August is 14h and 17min.

When is the sunrise / sunset in August in Shelby?

On the first day of August in Shelby, Montana, sunrise is at 6:03 am and sunset at 9:04 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 8:10 pm MDT.

How many hours of sunshine does Shelby have in August?

In Shelby, Montana, the average sunshine duration in August is 11.3h.

How high is the UV index in August in Shelby?

In August, the average daily maximum UV index in Shelby is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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"Hg

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

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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").
The 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).
The 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: 14h and 2min

The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).

  • Average sunshine in August: 11h and 2min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).

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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).
The 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

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

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Shelby, Montana, USA

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