August weather forecastSweet Grass, MT
August
Weather in August
August, the last month of the summer in Sweet Grass, is also a moderately hot month, with temperature in the range of an average low of 55.2°F (12.9°C) and an average high of 78.1°F (25.6°C).Temperature
The shift into August finds Sweet Grass at an average high-temperature of a still moderately hot 78.1°F (25.6°C), closely comparable to July's conditions. Sweet Grass records a marked divergence from the day's high temperatures, with nights in August averaging at a cool 55.2°F (12.9°C).Humidity
With an average relative humidity of 43%, August is the least humid month.Rainfall
In August, the rain falls for 5.8 days. Throughout August, 0.47" (12mm) of precipitation is accumulated. Throughout the year, there are 70.4 rainfall days, and 8.46" (215mm) of precipitation is accumulated.Snowfall
June through August are months without snowfall.Daylight
In August, the average length of the day is 14h and 19min.On the first day of August, sunrise is at 6:02 am and sunset at 9:06 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 8:11 pm MDT.
Sunshine
In Sweet Grass, the average sunshine in August is 11.4h.UV index
In August, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: An average maximum UV index of 5 in August leads to these recommendations:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. Around midday, solar radiation is most harmful; hence, exposure should be limited. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Sweet Grass, MT
- Average high temperature in August: 78.1°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is December (27.1°F).
- Average low temperature in August: 55.2°F
The month with the highest average low temperature is August (55.2°F).
The coldest month (with the lowest average low temperature) is December (15.3°F).
Average pressure in August
Sweet Grass, MT
- Average pressure in August: 29.91"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in August
Sweet Grass, MT
- Average wind speed in August: 8.8mph
The windiest month (with the highest average wind speed) is January (11.8mph).
The calmest months (with the lowest average wind speed) are July and August (8.8mph).
Average humidity in August
Sweet Grass, MT
- Average humidity in August: 43%
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (43%).
Average rainfall in August
Sweet Grass, MT
- Average rainfall in August: 0.47"
The wettest month (with the highest rainfall) is June (1.77").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in August
Sweet Grass, MT
- Average rainfall days in August: 5.8 days
The month with the highest number of rainy days is May (10.4 days).
The month with the least rainy days is November (2.6 days).
Average snowfall in August
Sweet Grass, MT
- Average snowfall in August: 0"
The month with the highest snowfall is February (3.58").
The months with the least snowfall are June, July and August (0").
Average snowfall days in August
Sweet Grass, MT
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is December (10.2 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in August /
Average sunshine in August
Sweet Grass, MT
- Average daylight in August: 14h and 18min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in August: 11h and 24min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 5h and 36min).
Average sunshine days in August
Sweet Grass, MT
- Average sunshine days in August: 23.3 days
The month with the most sunshine days is July (23.5 days).
The month with the least sunshine days is April (17.4 days).
Average UV index in August
Sweet Grass, MT
- Average UV index in August: 5
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in August
Sweet Grass, MT
- Average cloud cover in August: 16
The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is July (Cloud cover 15).
Average visibility in August
Sweet Grass, MT
- Average visibility in August: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
