August weather forecastJefferson, WI
August
Weather in August
August, the last month of the summer in Jefferson, is another warm month, with an average temperature varying between 77.5°F (25.3°C) and 59.7°F (15.4°C).Temperature
Jefferson, Wisconsin, greets August with an average high-temperature of a still moderately hot 77.5°F (25.3°C), marking a slight deviation from the preceding month. During August, the temperature is averaged to a low of 59.7°F (15.4°C) at night.Humidity
In August, the average relative humidity in Jefferson is 83%.Rainfall
In Jefferson, in August, during 15.6 rainfall days, 2.8" (71mm) of precipitation is typically accumulated. Throughout the year, in Jefferson, there are 149.4 rainfall days, and 28.82" (732mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Jefferson, Wisconsin.Daylight
The average length of the day in August is 13h and 53min.On the first day of the month, sunrise is at 5:46 am and sunset at 8:16 pm. On the last day of August, sunrise is at 6:19 am and sunset at 7:31 pm CDT.
Sunshine
In August, the average sunshine is 9.7h.UV index
The average daily maximum UV index in August in Jefferson is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: A maximum daily UV index of 5 during August morphs into the following directions:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Jefferson, WI
- Average high temperature in August: 77.5°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (24.3°F).
- Average low temperature in August: 59.7°F
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (12°F).
Average pressure in August
Jefferson, WI
- Average pressure in August: 29.97"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in August
Jefferson, WI
- Average wind speed in August: 6.4mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in August
Jefferson, WI
- Average humidity in August: 83%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (76%).
Average rainfall in August
Jefferson, WI
- Average rainfall in August: 2.8"
The wettest month (with the highest rainfall) is June (3.78").
The driest months (with the least rainfall) are January and February (1.42").
Average rainfall days in August
Jefferson, WI
- Average rainfall days in August: 15.6 days
The month with the highest number of rainy days is May (19.6 days).
The month with the least rainy days is February (5 days).
Average snowfall in August
Jefferson, WI
- Average snowfall in August: 0"
The month with the highest snowfall is February (5.39").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Jefferson, WI
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (15.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Jefferson, 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: 9h and 42min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in August
Jefferson, WI
- Average sunshine days in August: 12.3 days
The month with the most sunshine days is November (16.1 days).
The months with the least sunshine days are May and June (9.8 days).
Average UV index in August
Jefferson, WI
- Average UV index in August: 5
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in August
Jefferson, WI
- Average cloud cover in August: 34
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in August
Jefferson, WI
- Average visibility in August: 5mi
The months with the highest visibility are March, April, May, June, October and November (6mi).
The months with the lowest visibility are January, February, July, August, September and December (5mi).
