September weather forecast
Wauwatosa, WI

Weather in September

The first month of the autumn, September, is also an agreeable month in Wauwatosa, Wisconsin, with an average temperature varying between 70.5°F (21.4°C) and 57.4°F (14.1°C).

Temperature

In Wauwatosa, the average high-temperature in September marginally drops from a moderately hot 77°F (25°C) in August to a pleasant 70.5°F (21.4°C). In Wauwatosa, in September, the average low-temperature is 57.4°F (14.1°C).

Humidity

The average relative humidity in September in Wauwatosa is 77%.

Rainfall

In Wauwatosa, Wisconsin, during September, the rain falls for 6.4 days and regularly aggregates up to 0.35" (9mm) of precipitation. Throughout the year, in Wauwatosa, Wisconsin, 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 September in Wauwatosa is 12h and 29min.
On the first day of September in Wauwatosa, sunrise is at 6:16 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:35 pm CDT.

Sunshine

In September, the average sunshine is 9.1h.

UV index

In Wauwatosa, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 4 in September transform into the following instructions:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the average humidity in September in Wauwatosa?

The average relative humidity in September in Wauwatosa is 77%.

How much does it rain in Wauwatosa in September?

In Wauwatosa, in September, it is raining for 6.4 days, with typically 0.35" (9mm) of accumulated precipitation.

When it does not snow in Wauwatosa?

In Wauwatosa, snow does not fall in May through September.

Does it snow in Wauwatosa in September?

In Wauwatosa, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Wauwatosa have in September?

In September, the average day length in Wauwatosa, Wisconsin, is 12h and 29min.

When are sunrise and sunset in September in Wauwatosa?

In September, on the first day of the month, sunrise is at 6:16 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:35 pm CDT.

How long on average sun shines in September in Wauwatosa?

The average sunshine duration in September is 9.1h.

What is the UV index reading in September in Wauwatosa?

In Wauwatosa, Wisconsin, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Wauwatosa, WI

Average temperature in September - Wauwatosa, WI
  • Average high temperature in September: 70.5°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 September: 57.4°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).

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Average pressure in September
Wauwatosa, WI

Average pressure in September - Wauwatosa, WI
  • Average pressure in September: 30.03"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).

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Average wind speed in September
Wauwatosa, WI

Average wind speed in September - Wauwatosa, WI
  • Average wind speed in September: 8.5mph

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).

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Average humidity in September
Wauwatosa, WI

Average humidity in September - Wauwatosa, WI
  • Average humidity in September: 77%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (75%).

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Average rainfall in September
Wauwatosa, WI

Average rainfall in September - Wauwatosa, WI
  • Average rainfall in September: 0.35"

The wettest month (with the highest rainfall) is July (0.75").
The driest months (with the least rainfall) are February and December (0.28").

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Average rainfall days in September
Wauwatosa, WI

Average rainfall days in September - Wauwatosa, WI
  • Average rainfall days in September: 6.4 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).

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Average snowfall in September
Wauwatosa, WI

Average snowfall in September - Wauwatosa, WI
  • Average snowfall in September: 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").

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Average snowfall days in September
Wauwatosa, WI

Average snowfall days in September - Wauwatosa, WI
  • Average snowfall days in September: 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).

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Average daylight in September /
Average sunshine in September
Wauwatosa, WI

Average daylight in September / Average sunshine in September - Wauwatosa, WI
  • Average daylight in September: 12h and 29min

The month with the longest days is June (Average daylight: 15h and 19min).
The month with the shortest days is December (Average daylight: 9h and 4min).

  • Average sunshine in September: 9h and 6min

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).

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Average sunshine days in September
Wauwatosa, WI

Average sunshine days in September - Wauwatosa, WI
  • Average sunshine days in September: 21.8 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).

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Average UV index in September
Wauwatosa, WI

Average UV index in September - Wauwatosa, WI
  • Average UV index in September: 4

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).

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Average cloud cover in September
Wauwatosa, WI

Average cloud cover in September - Wauwatosa, WI
  • Average cloud cover in September: 30

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).

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Average visibility in September
Wauwatosa, WI

Average visibility in September - Wauwatosa, WI
  • Average visibility in September: 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).

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