August weather forecastGreat Falls, MT
August
Weather in August
August hosts classic summer weather, albeit with a slight dip in temperature compared to July. Equipped with long hours of sunshine, reaching upto 81.9°F (27.7°C), it is a great period for water sports and beach activities. The expected weather transition from August to September is represented by a significant temperature drop and a rising trend of rainfall. This change, however, does not stifle the wide range of outdoor activities enjoyed by locals and tourists.Temperature
As July turns into August, the average high-temperatures rest at a still moderately hot 81.9°F (27.7°C), showing a minor variation from the prior month. August presents a pronounced difference from daytime highs, with a consistent average low-temperature of 57.7°F (14.3°C).Heat index
The average heat index in August is appraised at 80.6°F (27°C). Exhaustion becomes probable with enduring exposure and activity, potentially causing heat cramps.Heat index values are typically calculated for conditions of shade and a light breeze. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
Humidity
With an average relative humidity of 40%, August is the least humid month.Rainfall
In Great Falls, during August, the rain falls for 5.6 days and regularly aggregates up to 0.28" (7mm) of precipitation. Throughout the year, there are 68.2 rainfall days, and 4.49" (114mm) of precipitation is accumulated.Snowfall
June through August are months without snowfall.Daylight
The average length of the day in August is 14h and 12min.On the first day of the month, sunrise is at 6:04 am and sunset at 8:58 pm. On the last day of August, sunrise is at 6:43 am and sunset at 8:06 pm MDT.
Sunshine
In August, the average sunshine is 11.4h.UV index
In August, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: A daily high UV index of 5 in August leads to these guidelines:
Put precautions into practice - Guidance to elude sunburn is provided. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Great Falls, MT
- Average high temperature in August: 81.9°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is December (30°F).
- Average low temperature in August: 57.7°F
The month with the highest average low temperature is August (57.7°F).
The coldest months (with the lowest average low temperature) are February and December (18.3°F).
Average pressure in August
Great Falls, MT
- Average pressure in August: 29.92"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in August
Great Falls, MT
- Average wind speed in August: 7.7mph
The windiest month (with the highest average wind speed) is November (11.4mph).
The calmest month (with the lowest average wind speed) is August (7.7mph).
Average humidity in August
Great Falls, MT
- Average humidity in August: 40%
The month with the highest relative humidity is January (77%).
The month with the lowest relative humidity is August (40%).
Average rainfall in August
Great Falls, MT
- Average rainfall in August: 0.28"
The wettest month (with the highest rainfall) is June (0.87").
The driest month (with the least rainfall) is December (0.16").
Average rainfall days in August
Great Falls, MT
- Average rainfall days in August: 5.6 days
The month with the highest number of rainy days is April (9.9 days).
The month with the least rainy days is December (2.7 days).
Average snowfall in August
Great Falls, MT
- Average snowfall in August: 0"
The month with the highest snowfall is February (2.09").
The months with the least snowfall are June, July and August (0").
Average snowfall days in August
Great Falls, MT
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (10 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in August /
Average sunshine in August
Great Falls, MT
- Average daylight in August: 14h and 12min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in August: 11h and 24min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 30min).
Average sunshine days in August
Great Falls, MT
- Average sunshine days in August: 23.9 days
The month with the most sunshine days is July (26.1 days).
The months with the least sunshine days are February and April (16.2 days).
Average UV index in August
Great Falls, 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
Great Falls, MT
- Average cloud cover in August: 16
The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 13).
Average visibility in August
Great Falls, 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).
