August weather forecast
Grantsdale, MT

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Weather in August

The last month of the summer, August, is also a moderately hot month in Grantsdale, Montana, with an average temperature fluctuating between 76.3°F (24.6°C) and 46.9°F (8.3°C).

Temperature

As Grantsdale, Montana, welcomes August, the average high-temperature stabilizes at a still moderately hot 76.3°F (24.6°C), showing little deviation from July's 77°F (25°C). Grantsdale, after an intense day, registers a significant cooling to an average low-temperature of 46.9°F (8.3°C) throughout August.

Humidity

August is the least humid month in Grantsdale, with an average relative humidity of 50%.

Rainfall

August is the month with the least rainfall. Rain falls for 8.7 days and accumulates 0.75" (19mm) of precipitation.

Snowfall

In Grantsdale, snow does not fall in June through August.

Daylight

In Grantsdale, the average length of the day in August is 14h and 6min.
On the first day of August in Grantsdale, Montana, sunrise is at 6:19 am and sunset at 9:06 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 8:16 pm MDT.

Sunshine

The months with the most sunshine in Grantsdale are July and August, with an average of 11.7h of sunshine.

UV index

In August, the average daily maximum UV index in Grantsdale, Montana, is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.
Note: During August, 4 as the daily maximum UV index converts into the following advice:
Act with care - The need to guard against sun damage is communicated. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
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Frequently asked questions

What is the temperature in August in Grantsdale?

The average high-temperature and low-temperature in Grantsdale during August are 76.3°F (24.6°C) and 46.9°F (8.3°C) respectively.

What is the least humid month in Grantsdale?

August is the least humid month in Grantsdale, with an average relative humidity of 50%.

What is the average humidity in August in Grantsdale?

In August, the average relative humidity in Grantsdale is 50%.

What is the driest month in Grantsdale?

The month with the least rainfall in Grantsdale is August, when the rain falls for 8.7 days and typically collects 0.75" (19mm) of precipitation.

How many days does it rain in August in Grantsdale?

In Grantsdale, in August, during 8.7 rainfall days, 0.75" (19mm) of precipitation is typically accumulated.

When it does not snow in Grantsdale?

In Grantsdale, Montana, snow does not fall in June through August.

Does it snow in Grantsdale in August?

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

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

In Grantsdale, Montana, the average day length in August is 14h and 6min.

What time are sunrise and sunset in August in Grantsdale?

In August, on the first day of the month, sunrise is at 6:19 am and sunset at 9:06 pm. On the last day of the month, in Grantsdale, sunrise is at 6:56 am and sunset at 8:16 pm MDT.

What are the months with the most sunshine in Grantsdale?

The months with the most sunshine in Grantsdale, Montana, are July and August, with an average of 11.7h of sunshine.

How long on average sun shines in August in Grantsdale?

The average sunshine duration in August is 11.7h.

What is the UV index intensity in August in Grantsdale?

In Grantsdale, Montana, the average daily maximum UV index in August is 4. A UV Index reading of 3 to 5 represents a moderate health threat from unsafe exposure to Sun's UV rays.
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
Grantsdale, MT

Average temperature in August - Grantsdale, MT
  • Average high temperature in August: 76.3°F

The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is December (26.8°F).

  • Average low temperature in August: 46.9°F

The month with the highest average low temperature is August (46.9°F).
The coldest month (with the lowest average low temperature) is December (14°F).

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Average pressure in August
Grantsdale, MT

Average pressure in August - Grantsdale, MT
  • Average pressure in August: 29.97"Hg

The month with the highest atmospheric pressure is January (30.21"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in August
Grantsdale, MT

Average wind speed in August - Grantsdale, MT
  • Average wind speed in August: 4.1mph

The windiest month (with the highest average wind speed) is January (5.3mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).

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Average humidity in August
Grantsdale, MT

Average humidity in August - Grantsdale, MT
  • Average humidity in August: 50%

The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (50%).

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Average rainfall in August
Grantsdale, MT

Average rainfall in August - Grantsdale, MT
  • Average rainfall in August: 0.75"

The wettest months (with the highest rainfall) are February and April (2.36").
The driest month (with the least rainfall) is August (0.75").

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Average rainfall days in August
Grantsdale, MT

Average rainfall days in August - Grantsdale, MT
  • Average rainfall days in August: 8.7 days

The month with the highest number of rainy days is May (19.5 days).
The month with the least rainy days is July (8 days).

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Average snowfall in August
Grantsdale, MT

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

The month with the highest snowfall is February (13.03").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in August
Grantsdale, MT

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

The month with the highest number of snowfall days is February (19.3 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in August / Average sunshine in August - Grantsdale, MT
  • Average daylight in August: 14h and 1min

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).

  • Average sunshine in August: 11h and 4min

The months with the most sunshine are July and August (Average sunshine: 11h and 42min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).

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Average sunshine days in August
Grantsdale, MT

Average sunshine days in August - Grantsdale, MT
  • Average sunshine days in August: 17.4 days

The month with the most sunshine days is July (18.9 days).
The month with the least sunshine days is February (5.6 days).

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Average UV index in August
Grantsdale, MT

Average UV index in August - Grantsdale, MT
  • Average UV index in August: 4

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are February and December (UV index 1).

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Average cloud cover in August
Grantsdale, MT

Average cloud cover in August - Grantsdale, MT
  • Average cloud cover in August: 13

The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 13).

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Average visibility in August
Grantsdale, MT

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

The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March and December (4mi).

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Grantsdale, Montana, USA

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