August weather forecastGreendale, WI
August
Weather in August
August, the last month of the summer in Greendale, is also a moderately hot month, with an average temperature fluctuating between 77.4°F (25.2°C) and 63.5°F (17.5°C).Temperature
Transitioning into August, Greendale records an average high-temperature of a still moderately hot 77.4°F (25.2°C), almost identical to July's 78.3°F (25.7°C). In the month of August, the average low-temperature in Greendale usually rests at a refreshing 63.5°F (17.5°C).Humidity
The average relative humidity in August is 78%.Rainfall
In Greendale, in August, it is raining for 15.2 days, with typically 2.32" (59mm) of accumulated precipitation. In Greendale, during the entire year, the rain falls for 129 days and collects up to 20.35" (517mm) of precipitation.Snowfall
June through September are months without snowfall in Greendale, Wisconsin.Daylight
The average length of the day in August is 13h and 53min.On the first day of the month, sunrise is at 5:43 am and sunset at 8:12 pm. On the last day of August, in Greendale, sunrise is at 6:16 am and sunset at 7:27 pm CDT.
Sunshine
With an average of 10.4h of sunshine, August has the most sunshine of the year in Greendale, Wisconsin.UV index
In Greendale, the average daily maximum UV index in August is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The daily high UV index of 5 during August translates into the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Greendale, WI
- Average high temperature in August: 77.4°F
The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in August: 63.5°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (16°F).
Average pressure in August
Greendale, WI
- Average pressure in August: 29.97"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in August
Greendale, WI
- Average wind speed in August: 7mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in August
Greendale, WI
- Average humidity in August: 78%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (75%).
Average rainfall in August
Greendale, WI
- Average rainfall in August: 2.32"
The wettest month (with the highest rainfall) is July (2.6").
The driest month (with the least rainfall) is December (0.79").
Average rainfall days in August
Greendale, WI
- Average rainfall days in August: 15.2 days
The month with the highest number of rainy days is July (16.7 days).
The month with the least rainy days is February (3.2 days).
Average snowfall in August
Greendale, WI
- Average snowfall in August: 0"
The month with the highest snowfall is January (3.23").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Greendale, WI
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (13 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Greendale, WI
- Average daylight in August: 13h and 54min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in August: 10h and 24min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in August
Greendale, WI
- Average sunshine days in August: 12.5 days
The month with the most sunshine days is November (18.2 days).
The month with the least sunshine days is July (11.4 days).
Average UV index in August
Greendale, 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 and December (UV index 1).
Average cloud cover in August
Greendale, WI
- Average cloud cover in August: 29
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 29).
Average visibility in August
Greendale, WI
- 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).
