August weather forecastGarrison, MT
August
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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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: 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: 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: 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: 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: 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: 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: 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: 14h and 6min
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 36min
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: 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: 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: 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: 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).
