Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
Janesville experiences a minor change to a still warm 78.1°F (25.6°C) in average high-temperature during August, closely reflecting July. The nighttime temperature, during August, averages of 60.3°F (15.7°C).Humidity
The average relative humidity in August is 83%.Rainfall
In Janesville, in August, it is raining for 13.6 days, with typically 1.81" (46mm) of accumulated precipitation. Throughout the year, in Janesville, Wisconsin, there are 127.7 rainfall days, and 17.87" (454mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in August is 13h and 52min.On the first day of August, sunrise is at 5:48 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 6:20 am and sunset at 7:31 pm CDT.
Sunshine
July and August, with an average of 9.7h of sunshine, are months with the most sunshine.UV index
In Janesville, Wisconsin, the average daily maximum UV index in August is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In August, the UV index of 5 transforms into the following advice:
Undertake protective steps - Preventing sun damage is advised. To guard against the harmful effects of the Sun, minimize exposure during midday. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Janesville in August?
What is the average humidity in August?
How many days does it rain in August?
When it does not snow?
How many hours of daylight does Janesville have in August?
When are sunrise and sunset in August in Janesville?
What are the months with the most sunshine?
How long on average sun shines in August?
What is the UV index intensity in August?
Average temperature in August
Janesville, WI
- Average high temperature in August: 78.1°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (25°F).
- Average low temperature in August: 60.3°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (12.9°F).
Average pressure in August
Janesville, 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
Janesville, WI
- Average wind speed in August: 6.4mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in August
Janesville, WI
- Average humidity in August: 83%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and October (76%).
Average rainfall in August
Janesville, WI
- Average rainfall in August: 1.81"
The wettest month (with the highest rainfall) is June (2.76").
The driest months (with the least rainfall) are January and February (0.75").
Average rainfall days in August
Janesville, WI
- Average rainfall days in August: 13.6 days
The month with the highest number of rainy days is June (16.3 days).
The month with the least rainy days is January (3.5 days).
Average snowfall in August
Janesville, WI
- Average snowfall in August: 0"
The month with the highest snowfall is January (2.83").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Janesville, WI
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (12.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Janesville, WI
- Average daylight in August: 13h and 5min
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 4min
The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in August
Janesville, WI
- Average sunshine days in August: 13.9 days
The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in August
Janesville, 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
Janesville, WI
- Average cloud cover in August: 35
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is September (Cloud cover 34).
Average visibility in August
Janesville, WI
- Average visibility in August: 5mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
Janesville, Wisconsin, USA
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