September weather forecast
Appleton, WI

Colorful trees and neat lawns in Lawrence University in Appleton, Wisconsin, the river, and the rest of the city
Colorful trees and neat lawns in Lawrence University in Appleton, Wisconsin, the river, and the rest of the city

Weather in September

September, the first month of the autumn in Appleton, is also an agreeable month, with temperature in the range of an average low of 52°F (11.1°C) and an average high of 70.2°F (21.2°C).

Temperature

In September, the average high-temperature marginally drops from a moderately hot 77.4°F (25.2°C) in August to a pleasant 70.2°F (21.2°C). In September, the average low-temperature is 52°F (11.1°C).

Humidity

In Appleton, the average relative humidity in September is 79%.

Rainfall

In Appleton, during 12.1 rainfall days, 1.81" (46mm) of precipitation is typically accumulated. Throughout the year, there are 131.1 rainfall days, and 24.45" (621mm) of precipitation is accumulated.

Snowfall

In Appleton, snow does not fall in June through September.

Daylight

In September, the average length of the day is 12h and 30min.
On the first day of September, sunrise is at 6:16 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:36 pm CDT.

Sunshine

In Appleton, Wisconsin, the average sunshine in September is 8.5h.

UV index

The average daily maximum UV index in September in Appleton, Wisconsin, is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The daily maximum UV index of 3 in September interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Appleton?

The average high-temperature, in September, in Appleton, Wisconsin, is 70.2°F (21.2°C), while the average low-temperature is 52°F (11.1°C).

What is the average humidity in September in Appleton?

The average relative humidity in September is 79%.

How many days does it rain in September in Appleton?

In Appleton, Wisconsin, in September, during 12.1 rainfall days, 1.81" (46mm) of precipitation is typically accumulated.

When it does not snow in Appleton?

June through September are months without snowfall in Appleton, Wisconsin.

Does it snow in Appleton in September?

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

How many hours of daylight does Appleton have in September?

In September, the average day length is 12h and 30min.

What time are sunrise and sunset in September in Appleton?

On the first day of September, sunrise is at 6:16 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:36 pm CDT.

How many hours of sunshine does Appleton have in September?

In September, the average sunshine duration in Appleton, Wisconsin, is 8.5h.

How high is the UV index in September in Appleton?

The average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium hazard to health 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
Appleton, WI

Average temperature in September - Appleton, WI
  • Average high temperature in September: 70.2°F

The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (21.9°F).

  • Average low temperature in September: 52°F

The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).

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Average pressure in September
Appleton, WI

Average pressure in September - Appleton, WI
  • Average pressure in September: 30.02"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).

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Average wind speed in September
Appleton, WI

Average wind speed in September - Appleton, WI
  • Average wind speed in September: 7.9mph

The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).

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Average humidity in September
Appleton, WI

Average humidity in September - Appleton, WI
  • Average humidity in September: 79%

The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is April (75%).

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Average rainfall in September
Appleton, WI

Average rainfall in September - Appleton, WI
  • Average rainfall in September: 1.81"

The wettest month (with the highest rainfall) is May (3.54").
The driest month (with the least rainfall) is February (1.06").

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Average rainfall days in September
Appleton, WI

Average rainfall days in September - Appleton, WI
  • Average rainfall days in September: 12.1 days

The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (3.9 days).

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Average snowfall in September
Appleton, WI

Average snowfall in September - Appleton, WI
  • Average snowfall in September: 0"

The month with the highest snowfall is January (5.79").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Appleton, WI

Average snowfall days in September - Appleton, WI
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (14.2 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
Appleton, WI

Average daylight in September / Average sunshine in September - Appleton, WI
  • Average daylight in September: 12h and 30min

The month with the longest days is June (Average daylight: 15h and 28min).
The month with the shortest days is December (Average daylight: 8h and 56min).

  • Average sunshine in September: 8h and 30min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).

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Average sunshine days in September
Appleton, WI

Average sunshine days in September - Appleton, WI
  • Average sunshine days in September: 16.4 days

The month with the most sunshine days is September (16.4 days).
The month with the least sunshine days is April (11.8 days).

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Average UV index in September
Appleton, WI

Average UV index in September - Appleton, WI
  • Average UV index in September: 3

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).

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Average cloud cover in September
Appleton, WI

Average cloud cover in September - Appleton, WI
  • Average cloud cover in September: 35

The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 32).

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Average visibility in September
Appleton, WI

Average visibility in September - Appleton, WI
  • Average visibility in September: 6mi

The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).

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