August weather forecast and climate
Grass Range, MT

Weather in August

The last month of the summer, August, is also a moderately hot month in Grass Range, Montana, with average temperature varying between 54.5°F (12.5°C) and 78.1°F (25.6°C).

Temperature

In Grass Range, the average high-temperature is essentially the same as in July - a still moderately hot 78.1°F (25.6°C). The average low-temperature, in August, is 54.5°F (12.5°C).

Humidity

With an average relative humidity of 47%, August is the least humid month in Grass Range.

Rainfall

In Grass Range, it is raining for 10.5 days, with typically 1.34" (34mm) of accumulated precipitation. Throughout the year, in Grass Range, there are 126.2 rainfall days, and 17.83" (453mm) of precipitation is accumulated.

Snowfall

July and August are months without snowfall in Grass Range, Montana.

Daylight

In Grass Range, the average length of the day is 14.2h.

Sunshine

In August, the average sunshine is 11.4h.

UV index

In August, the average daily maximum UV index in Grass Range is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to the UV radiation for ordinary individuals.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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 temperature in August in Grass Range?

The average high-temperature, in August, is 78.1°F (25.6°C), while the average low-temperature is 54.5°F (12.5°C).

What is the least humid month in Grass Range?

The least humid month in Grass Range is August, with an average relative humidity of 47%.

What is the average humidity in August in Grass Range?

In August, the average relative humidity in Grass Range, Montana, is 47%.

How much does it rain in Grass Range in August?

In Grass Range, in August, during 10.5 rainfall days, 1.34" (34mm) of precipitation is typically accumulated.

Does it snow in Grass Range in August?

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

When it does not snow in Grass Range?

In Grass Range snow does not fall in July and August.

What is the average length of the day in August in Grass Range?

In Grass Range, Montana, the average length of the day in August is 14.2h.

How long on average sun shines in August in Grass Range?

In Grass Range, Montana, the average sunshine in August is 11.4h.

What is the UV index reading in August in Grass Range?

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

Average temperature in August
Grass Range, MT

Average temperature in August - Grass Range, MT
  • Average high temperature in August: 78.1°F

The warmest month (with the highest average high temperature) is July (78.8°F).
Months with the lowest average high temperature are February and December (29.1°F).

  • Average low temperature in August: 54.5°F

The month with the highest average low temperature is August (54.5°F).
The coldest month (with the lowest average low temperature) is February (15.3°F).

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Average pressure in August
Grass Range, MT

Average pressure in August - Grass Range, MT
  • Average pressure in August: 29.9"

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is June (29.85").

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Average wind speed in August
Grass Range, MT

Average wind speed in August - Grass Range, MT
  • Average wind speed in August: 7.4mph

The windiest months (with the highest average wind speed) are January, April and October (9.9mph).
The calmest month (with the lowest average wind speed) is August (7.4mph).

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Average humidity in August
Grass Range, MT

Average humidity in August - Grass Range, MT
  • Average humidity in August: 47%

The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is August (47%).

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Average rainfall in August
Grass Range, MT

Average rainfall in August - Grass Range, MT
  • Average rainfall in August: 1.34"

The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is December (0.71").

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Average rainfall days in August
Grass Range, MT

Average rainfall days in August - Grass Range, MT
  • Average rainfall days in August: 10.5 days

The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (5.4 days).

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Average snowfall in August
Grass Range, MT

Average snowfall in August - Grass Range, MT
  • Average snowfall in August: 0"

The month with the highest snowfall is April (9.13").
Months with the least snowfall are July and August (0").

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Average snowfall days in August
Grass Range, MT

Average snowfall days in August - Grass Range, MT
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (15.2 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
Grass Range, MT

Average daylight in August / Average sunshine in August - Grass Range, MT
  • Average daylight in August: 14.2h

The month with the longest days is June (Average daylight: 15.8h).
The month with the shortest days is December (Average daylight: 8.6h).

  • Average sunshine in August: 11.4h

The month with the most sunshine is July (Average sunshine: 11.8h).
The month with the least sunshine is February (Average sunshine: 5.5h).

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Average sunshine days in August
Grass Range, MT

Average sunshine days in August - Grass Range, MT
  • Average sunshine days in August: 17.2 days

The month with the most sunshine days is September (19.3 days).
The month with the least sunshine days is April (8.3 days).

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Average UV index in August
Grass Range, MT

Average UV index in August - Grass Range, 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, April, October, November and December (UV index 2).

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Average cloud cover in August
Grass Range, MT

Average cloud cover in August - Grass Range, MT
  • Average cloud cover in August: 17

The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 16).

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Average visibility in August
Grass Range, MT

Average visibility in August - Grass Range, 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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