August weather forecastGrantsburg, WI
August
Weather in August
The last month of the summer, August, is also a moderately hot month in Grantsburg, Wisconsin, with an average temperature fluctuating between 76.8°F (24.9°C) and 57.7°F (14.3°C).Temperature
August experiences an average high-temperature of a still warm 76.8°F (24.9°C), barely different from July's 78.8°F (26°C). During the nights in August, Grantsburg observes an average low-temperature of 57.7°F (14.3°C).Humidity
The average relative humidity in August is 78%.Rainfall
In Grantsburg, in August, it is raining for 13.9 days, with typically 2.05" (52mm) of accumulated precipitation. In Grantsburg, during the entire year, the rain falls for 124.6 days and collects up to 21.65" (550mm) of precipitation.Snowfall
In Grantsburg, snow does not fall in June through September.Daylight
In Grantsburg, Wisconsin, the average length of the day in August is 14h and 4min.On the first day of August, sunrise is at 5:54 am and sunset at 8:39 pm. On the last day of the month, sunrise is at 6:31 am and sunset at 7:50 pm CDT.
Sunshine
The average sunshine in August is 9.6h.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 unprotected exposure to Sun's UV rays for ordinary individuals.Note: An average maximum UV index of 5 in August leads to these recommendations:
Undertake protective steps - Recommendations to avoid sunburn are issued. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. 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
Grantsburg, WI
- Average high temperature in August: 76.8°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (18°F).
- Average low temperature in August: 57.7°F
The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is January (4.8°F).
Average pressure in August
Grantsburg, WI
- Average pressure in August: 29.94"Hg
The month with the highest atmospheric pressure is February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in August
Grantsburg, WI
- Average wind speed in August: 6.7mph
The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.7mph).
Average humidity in August
Grantsburg, WI
- Average humidity in August: 78%
The month with the highest relative humidity is January (91%).
The months with the lowest relative humidity are April and May (74%).
Average rainfall in August
Grantsburg, WI
- Average rainfall in August: 2.05"
The wettest month (with the highest rainfall) is June (3.39").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in August
Grantsburg, WI
- Average rainfall days in August: 13.9 days
The month with the highest number of rainy days is June (16.7 days).
The month with the least rainy days is January (2.8 days).
Average snowfall in August
Grantsburg, WI
- Average snowfall in August: 0"
The month with the highest snowfall is December (5.75").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Grantsburg, WI
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (15.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Grantsburg, WI
- 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: 9h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).
Average sunshine days in August
Grantsburg, WI
- Average sunshine days in August: 15.1 days
The month with the most sunshine days is November (16.5 days).
The month with the least sunshine days is June (10.1 days).
Average UV index in August
Grantsburg, 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, November and December (UV index 1).
Average cloud cover in August
Grantsburg, WI
- Average cloud cover in August: 34
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in August
Grantsburg, WI
- Average visibility in August: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
