August weather forecastSumner, WI
August
Weather in August
August, the last month of the summer in Sumner, is another warm month, with an average temperature ranging between max 76.6°F (24.8°C) and min 56.8°F (13.8°C).Temperature
The arrival of August denotes a barely perceptible change in the average high-temperatures to a still moderately hot 76.6°F (24.8°C) from July's 78.4°F (25.8°C). The low-temperature averages to a moderate 56.8°F (13.8°C) during the nights of August.Humidity
In Sumner, Wisconsin, the average relative humidity in August is 79%.Rainfall
In Sumner, during August, the rain falls for 14.8 days and regularly aggregates up to 2.44" (62mm) of precipitation. Throughout the year, in Sumner, there are 137.1 rainfall days, and 24.72" (628mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in August is 14h and 3min.On the first day of August in Sumner, sunrise is at 5:51 am and sunset at 8:33 pm. On the last day of the month, sunrise is at 6:27 am and sunset at 7:45 pm CDT.
Sunshine
In August, the average sunshine in Sumner is 9.4h.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 rays for the ordinary person.Note: The maximum daily UV index of 5 in August interprets into the following recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Sumner, WI
- Average high temperature in August: 76.6°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (17.6°F).
- Average low temperature in August: 56.8°F
The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is January (5.4°F).
Average pressure in August
Sumner, WI
- Average pressure in August: 29.94"Hg
The months with the highest atmospheric pressure are January and February (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in August
Sumner, WI
- Average wind speed in August: 6.6mph
The windiest month (with the highest average wind speed) is April (9mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity in August
Sumner, WI
- Average humidity in August: 79%
The months with the highest relative humidity are January and February (92%).
The month with the lowest relative humidity is May (76%).
Average rainfall in August
Sumner, WI
- Average rainfall in August: 2.44"
The wettest month (with the highest rainfall) is June (3.82").
The driest month (with the least rainfall) is January (0.87").
Average rainfall days in August
Sumner, WI
- Average rainfall days in August: 14.8 days
The month with the highest number of rainy days is June (19 days).
The month with the least rainy days is February (3.6 days).
Average snowfall in August
Sumner, WI
- Average snowfall in August: 0"
The month with the highest snowfall is February (6.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Sumner, WI
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (18.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Sumner, WI
- Average daylight in August: 14h and 0min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in August: 9h and 24min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).
Average sunshine days in August
Sumner, WI
- Average sunshine days in August: 13.1 days
The month with the most sunshine days is October (15.9 days).
The month with the least sunshine days is June (9.4 days).
Average UV index in August
Sumner, WI
- 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 and December (UV index 1).
Average cloud cover in August
Sumner, WI
- Average cloud cover in August: 36
The month with the most cloud cover is January (Cloud cover 72).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility in August
Sumner, WI
- Average visibility in August: 5mi
The months with the highest visibility are April, May, June and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
