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 transition into August shows a subtle variation to a still warm 75.4°F (24.1°C) from July's 76.1°F (24.5°C) in the average high-temperature. In August, in Grafton, the average low-temperature is a refreshing 62.4°F (16.9°C).Humidity
The average relative humidity in August in Grafton, Wisconsin, is 79%.Rainfall
In Grafton, in August, it is raining for 15.2 days, with typically 2.32" (59mm) of accumulated precipitation. Throughout the year, there are 134.9 rainfall days, and 23.94" (608mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In Grafton, the average length of the day in August is 13h and 55min.On the first day of the month, sunrise is at 5:42 am and sunset at 8:13 pm. On the last day of August, in Grafton, Wisconsin, sunrise is at 6:15 am and sunset at 7:28 pm CDT.
Sunshine
July and August, with an average of 10.4h of sunshine, are months with the most sunshine in Grafton.UV index
In Grafton, the average daily maximum UV index in August is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index of 5 in August converts into the following recommendations:
Take necessary precautions - Defending against sun damage is advocated. To guard against the harmful effects of the Sun, minimize exposure during midday. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Frequently asked questions
What are August temperatures in Grafton?
What is the average humidity in August in Grafton?
How many days does it rain in August in Grafton?
When it does not snow in Grafton?
What is the average length of the day in August in Grafton?
What time are sunrise and sunset in August in Grafton?
What are the months with the most sunshine in Grafton?
How long on average sun shines in August in Grafton?
How high is the UV index in August in Grafton?
Average temperature in August
Grafton, WI
- Average high temperature in August: 75.4°F
The warmest month (with the highest average high temperature) is July (76.1°F).
The month with the lowest average high temperature is January (25.5°F).
- Average low temperature in August: 62.4°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (15.8°F).
Average pressure in August
Grafton, WI
- Average pressure in August: 29.96"Hg
The months with the highest atmospheric pressure are January, February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in August
Grafton, WI
- Average wind speed in August: 7.6mph
The windiest month (with the highest average wind speed) is January (12.1mph).
The calmest month (with the lowest average wind speed) is July (7.5mph).
Average humidity in August
Grafton, WI
- Average humidity in August: 79%
The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are April, October and November (77%).
Average rainfall in August
Grafton, WI
- Average rainfall in August: 2.32"
The wettest month (with the highest rainfall) is July (2.99").
The driest month (with the least rainfall) is February (0.98").
Average rainfall days in August
Grafton, WI
- Average rainfall days in August: 15.2 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in August
Grafton, WI
- Average snowfall in August: 0"
The month with the highest snowfall is January (3.43").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Grafton, 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
Grafton, 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 0min).
- Average sunshine in August: 10h and 2min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in August
Grafton, WI
- Average sunshine days in August: 12.6 days
The month with the most sunshine days is December (16.4 days).
The month with the least sunshine days is July (11.6 days).
Average UV index in August
Grafton, 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, November and December (UV index 1).
Average cloud cover in August
Grafton, WI
- Average cloud cover in August: 28
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 28).
Average visibility in August
Grafton, 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).
Grafton, Wisconsin, USA
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