August weather forecast and climate
Grantsdale, MT

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

Temperature

In August, the average high-temperature is essentially the same as in July - a still warm 76.3°F (24.6°C). In August, in Grantsdale, the average low-temperature is 46.9°F (8.3°C).

Humidity

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

Rainfall

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

Snowfall

June through August are months without snowfall.

Daylight

The average length of the day in Grantsdale is 14.1h.

Sunshine

Months with the most sunshine are July and August, with an average of 11.7h of sunshine.

UV index

In Grantsdale, the average daily maximum UV index in August is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to the UV radiation for ordinary individuals.
Note: In August, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in August in Grantsdale?

The average high-temperature, in August, in Grantsdale, is 76.3°F (24.6°C), while the average low-temperature is 46.9°F (8.3°C).

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, Montana, is 50%.

How much does it rain in Grantsdale in August?

In Grantsdale, Montana, in August, it is raining for 8.7 days, with typically 0.75" (19mm) of accumulated precipitation.

What is the driest month in Grantsdale?

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

Does it snow in Grantsdale in August?

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

When it does not snow in Grantsdale?

June through August are months without snowfall in Grantsdale.

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

The average length of the day in August is 14.1h.

What are the months with the most sunshine in Grantsdale?

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

How long on average sun shines in August in Grantsdale?

In Grantsdale, Montana, the average sunshine in August is 11.7h.

How high is the UV index in August in Grantsdale?

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

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

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

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).

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%).

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").

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).

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

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

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).
Months with the least snowfall days are June, July and August (0 days).

Average daylight in August / Average sunshine in August - Grantsdale, MT
  • Average daylight in August: 14.1h

The month with the longest days is June (Average daylight: 15.7h).
The month with the shortest days is December (Average daylight: 8.7h).

  • Average sunshine in August: 11.7h

Months with the most sunshine are July and August (Average sunshine: 11.7h).
Months with the least sunshine are January and December (Average sunshine: 5.4).

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).

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).
Months with the lowest UV index are February and December (UV index 1).

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).

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

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