August weather forecast
Garrison, MT

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Weather in August

The last month of the summer, August, is another warm month in Garrison, Montana, with an average temperature varying between 75.2°F (24°C) and 47.3°F (8.5°C).

Temperature

Garrison, Montana, notes an average high-temperature of a still warm 75.2°F (24°C) in August, hardly diverging from July. Garrison, amidst the high August temperatures, experiences a substantial shift to an average nighttime low of 47.3°F (8.5°C).

Humidity

July and August, with an average relative humidity of 49%, are the least humid months.

Rainfall

The month with the least rainfall is August, when the rain falls for 7.3 days and typically collects 0.67" (17mm) of precipitation.

Snowfall

July and August are months without snowfall.

Daylight

In August, the average length of the day is 14h and 7min.
On the first day of August, sunrise is at 6:13 am and sunset at 9:01 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 8:11 pm MDT.

Sunshine

In August, the average sunshine is 11.6h.

UV index

In Garrison, the average daily maximum UV index in August is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum UV index of 4 during August leads to these instructions:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.

Frequently asked questions

What is the average August temperature?

Garrison in August has an average high-temperature of 75.2°F (24°C) and an average low-temperature of 47.3°F (8.5°C).

What are the least humid months?

July and August, with an average relative humidity of 49%, are the least humid months.

What is the average humidity in August?

The average relative humidity in August is 49%.

What is the driest month?

The month with the least rainfall is August, when the rain falls for 7.3 days and typically collects 0.67" (17mm) of precipitation.

How many days does it rain in August in Garrison?

In Garrison, in August, it is raining for 7.3 days, with typically 0.67" (17mm) of accumulated precipitation.

When it does not snow?

In Garrison, snow does not fall in July and August.

Does it snow in August?

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

How many hours of daylight does Garrison have in August?

The average day length in August is 14h and 7min.

When is the sunrise / sunset in August?

On the first day of August, sunrise is at 6:13 am and sunset at 9:01 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 8:11 pm MDT.

How long on average sun shines in August?

In August, the average sunshine duration is 11.6h.

What is the UV index intensity in August?

In Garrison, the average daily maximum UV index in August is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability 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
Garrison, MT

Average temperature in August - Garrison, MT
  • Average high temperature in August: 75.2°F

The warmest month (with the highest average high temperature) is July (76.8°F).
The month with the lowest average high temperature is December (25.7°F).

  • Average low temperature in August: 47.3°F

The month with the highest average low temperature is August (47.3°F).
The coldest month (with the lowest average low temperature) is December (12.6°F).

Average pressure in August
Garrison, MT

Average pressure in August - Garrison, MT
  • Average pressure in August: 29.96"Hg

The months with the highest atmospheric pressure are January and December (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in August
Garrison, MT

Average wind speed in August - Garrison, MT
  • Average wind speed in August: 4.8mph

The windiest months (with the highest average wind speed) are January, April and November (6.3mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

Average humidity in August
Garrison, MT

Average humidity in August - Garrison, MT
  • Average humidity in August: 49%

The months with the highest relative humidity are January and February (88%).
The months with the lowest relative humidity are July and August (49%).

Average rainfall in August
Garrison, MT

Average rainfall in August - Garrison, MT
  • Average rainfall in August: 0.67"

The wettest month (with the highest rainfall) is June (2.52").
The driest month (with the least rainfall) is August (0.67").

Average rainfall days in August
Garrison, MT

Average rainfall days in August - Garrison, MT
  • Average rainfall days in August: 7.3 days

The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is August (7.3 days).

Average snowfall in August
Garrison, MT

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

The month with the highest snowfall is February (12.76").
The months with the least snowfall are July and August (0").

Average snowfall days in August
Garrison, MT

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

The month with the highest number of snowfall days is February (20.3 days).
The months with the least snowfall days are July and August (0 days).

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

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

The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).

  • Average sunshine in August: 11h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).

Average sunshine days in August
Garrison, MT

Average sunshine days in August - Garrison, MT
  • Average sunshine days in August: 21.3 days

The month with the most sunshine days is July (21.5 days).
The month with the least sunshine days is April (6.3 days).

Average UV index in August
Garrison, MT

Average UV index in August - Garrison, 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 January, February, March, April, October, November and December (UV index 2).

Average cloud cover in August
Garrison, MT

Average cloud cover in August - Garrison, MT
  • Average cloud cover in August: 15

The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 15).

Average visibility in August
Garrison, MT

Average visibility in August - Garrison, 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).

Garrison, Montana, USA

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