August weather forecastBillings, MT

August
Weather in August
August in Billings, Montana, sustains the heat of summer, mirroring July with an average high temperature of 83.1°F (28.4°C). Despite retaining the high temperatures, the city witnesses an increase in rainfall to 0.98" (25mm). The month marks the end of peak summer temperatures, augmenting the anticipation for the arrival of the cooler months of autumn and the reduced heat of September.Temperature
With the advent of August, Billings's high-temperatures adjust to a still moderately hot 83.1°F (28.4°C), closely aligning with the preceding month. Despite soaring daytime temperatures, Billings registers a consistent average low-temperature of 60.3°F (15.7°C) in August.Heat index
Throughout August, the heat index is estimated at 82.4°F (28°C). Fatigue might occur with continuous exposure and activity, potentially causing heat cramps.When assessing, remember that heat index measurements are for light winds and shaded spots. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', unifies temperature and humidity readings to offer a comprehensive feel of warmth. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
Humidity
August is the least humid month, with an average relative humidity of 40%.Rainfall
In Billings, during August, the rain falls for 11 days and regularly aggregates up to 0.98" (25mm) of precipitation. In Billings, during the entire year, the rain falls for 128.5 days and collects up to 14.69" (373mm) of precipitation.Snowfall
In Billings, snow does not fall in June through August.Daylight
In August, the average length of the day is 14h and 4min.On the first day of the month, sunrise is at 5:58 am and sunset at 8:42 pm. On the last day of August, sunrise is at 6:34 am and sunset at 7:53 pm MDT.
Sunshine
The average sunshine in August is 11.6h.UV index
The average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: An average maximum UV index of 6 in August leads to these recommendations:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Billings, MT
- Average high temperature in August: 83.1°F
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is December (31.1°F).
- Average low temperature in August: 60.3°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is February (18.3°F).
Average pressure in August
Billings, MT
- Average pressure in August: 29.91"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in August
Billings, MT
- Average wind speed in August: 7.2mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in August
Billings, MT
- Average humidity in August: 40%
The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is August (40%).
Average rainfall in August
Billings, MT
- Average rainfall in August: 0.98"
The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is July (0.71").
Average rainfall days in August
Billings, MT
- Average rainfall days in August: 11 days
The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in August
Billings, MT
- Average snowfall in August: 0"
The month with the highest snowfall is February (6.5").
The months with the least snowfall are June, July and August (0").
Average snowfall days in August
Billings, MT
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (13.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in August /
Average sunshine in August
Billings, MT
- Average daylight in August: 14h and 6min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in August: 11h and 36min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).
Average sunshine days in August
Billings, MT
- Average sunshine days in August: 16.3 days
The month with the most sunshine days is September (18.8 days).
The month with the least sunshine days is April (9.9 days).
Average UV index in August
Billings, MT
- Average UV index in August: 6
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in August
Billings, 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 15).
Average visibility in August
Billings, 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).





