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
The commencement of August introduces an average high-temperature of a still moderately hot 77.5°F (25.3°C), closely mirroring the preceding month. An average low-temperature of 59.9°F (15.5°C) is recorded during the nights in August.Humidity
In Sullivan, the average relative humidity in August is 83%.Rainfall
In August, the rain falls for 13.8 days. Throughout August, 1.69" (43mm) of precipitation is accumulated. In Sullivan, during the entire year, the rain falls for 121.6 days and collects up to 14.06" (357mm) of precipitation.Snowfall
In Sullivan, snow does not fall in June through September.Daylight
In Sullivan, Wisconsin, the average length of the day in August is 13h and 53min.On the first day of August in Sullivan, sunrise is at 5:46 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 6:18 am and sunset at 7:30 pm CDT.
Sunshine
The months with the most sunshine in Sullivan are July and August, with an average of 9.7h of sunshine.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: In August, the maximum UV index of 5 transforms into these recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are August temperatures in Sullivan?
What is the average humidity in August in Sullivan?
How many days does it rain in August in Sullivan?
When it does not snow in Sullivan?
What is the average length of the day in August in Sullivan?
When are sunrise and sunset in August in Sullivan?
What is the month with the most sunshine in Sullivan?
How many hours of sunshine does Sullivan have in August?
When is the highest UV index in Sullivan?
What is the UV index intensity in August in Sullivan?
Average temperature in August
Sullivan, 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: 59.9°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 (12.2°F).
Average pressure in August
Sullivan, WI
- Average pressure in August: 29.97"Hg
The months with the highest atmospheric pressure are January and February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in August
Sullivan, WI
- Average wind speed in August: 6.3mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in August
Sullivan, 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
Sullivan, WI
- Average rainfall in August: 1.69"
The wettest month (with the highest rainfall) is July (1.93").
The driest month (with the least rainfall) is December (0.55").
Average rainfall days in August
Sullivan, WI
- Average rainfall days in August: 13.8 days
The months with the highest number of rainy days are May and July (15.7 days).
The month with the least rainy days is January (2.8 days).
Average snowfall in August
Sullivan, WI
- Average snowfall in August: 0"
The month with the highest snowfall is January (2.13").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Sullivan, WI
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Sullivan, 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 24min).
Average sunshine days in August
Sullivan, WI
- Average sunshine days in August: 13 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is July (11.6 days).
Average UV index in August
Sullivan, WI
- Average UV index in August: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in August
Sullivan, 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
Sullivan, 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).
Sullivan, Wisconsin, USA
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