August weather forecastWauwatosa, WI
August
Weather in August
August is a continuation of summer, but a slight dip in temperature heralds the coming autumn season. As August progresses, daylight hours gradually reduce, heralding the end of summer and the onset of fall. Despite the consistent high temperature, the city records a negligible amount of snowfall in August. As transition into September occurs, cool winds from the north begin to make their presence felt, offering a respite from the summer heat. Rainfall remains a consistent feature throughout the month, ensuring the city continues to maintain its vibrant green landscapes.Temperature
August's advent denotes a minor fluctuation in the average high-temperature to a still warm 77°F (25°C) from July's 77.7°F (25.4°C). Wauwatosa reports a consistent average low-temperature of 63.9°F (17.7°C) throughout August nights.Humidity
In August, the average relative humidity in Wauwatosa is 77%.Rainfall
In Wauwatosa, during August, the rain falls for 8.7 days and regularly aggregates up to 0.55" (14mm) of precipitation. Throughout the year, in Wauwatosa, there are 75.6 rainfall days, and 5.83" (148mm) of precipitation is accumulated.Snowfall
In Wauwatosa, snow does not fall in May through September.Daylight
The average length of the day in August is 13h and 53min.On the first day of August, sunrise is at 5:43 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 6:16 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.UV index
In Wauwatosa, the average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 5 during August leads to these advisories:
Ensure safety - Sun damage prevention is strongly urged. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Wauwatosa, WI
- Average high temperature in August: 77°F
The warmest month (with the highest average high temperature) is July (77.7°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in August: 63.9°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (15.8°F).
Average pressure in August
Wauwatosa, WI
- Average pressure in August: 29.97"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 (29.92"Hg).
Average wind speed in August
Wauwatosa, WI
- Average wind speed in August: 7.2mph
The windiest month (with the highest average wind speed) is January (11.4mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in August
Wauwatosa, WI
- Average humidity in August: 77%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (75%).
Average rainfall in August
Wauwatosa, WI
- Average rainfall in August: 0.55"
The wettest month (with the highest rainfall) is July (0.75").
The driest months (with the least rainfall) are February and December (0.28").
Average rainfall days in August
Wauwatosa, WI
- Average rainfall days in August: 8.7 days
The month with the highest number of rainy days is June (9.9 days).
The months with the least rainy days are January and February (1.8 days).
Average snowfall in August
Wauwatosa, WI
- Average snowfall in August: 0"
The month with the highest snowfall is January (1.1").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Wauwatosa, WI
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (6.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Wauwatosa, 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 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 30min).
Average sunshine days in August
Wauwatosa, WI
- Average sunshine days in August: 20.1 days
The month with the most sunshine days is January (25.4 days).
The month with the least sunshine days is June (17.3 days).
Average UV index in August
Wauwatosa, WI
- Average UV index in August: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in August
Wauwatosa, 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
Wauwatosa, 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).
