September weather forecast
Casco, WI

Weather in September

The first month of the autumn, September, is also an agreeable month in Casco, Wisconsin, with average temperature ranging between min 55.6°F (13.1°C) and max 68°F (20°C).

Temperature

In September, the average high-temperature slightly decreases, from a moderately hot 75.6°F (24.2°C) in August, to a pleasant 68°F (20°C). In Casco, Wisconsin, in September, the average low-temperature is 55.6°F (13.1°C).

Humidity

In September, the average relative humidity in Casco, Wisconsin, is 78%.

Rainfall

In Casco, during 13.2 rainfall days, 1.85" (47mm) of precipitation is typically accumulated. Throughout the year, in Casco, there are 132.6 rainfall days, and 25.55" (649mm) of precipitation is accumulated.

Snowfall

In Casco snow does not fall in June through September.

Daylight

In September, the average length of the day is 12.5h.

Sunshine

The average sunshine in Casco is 8.6h.

UV index

The average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 3 translate into the following recommendations:
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. 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 average humidity in September in Casco?

In Casco, Wisconsin, the average relative humidity in September is 78%.

How many days does it rain in September in Casco?

In Casco, Wisconsin, in September, it is raining for 13.2 days, with typically 1.85" (47mm) of accumulated precipitation.

When it does not snow in Casco?

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

Does it snow in Casco in September?

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

How many hours of daylight does Casco have in September?

In September, the average length of the day is 12.5h.

How long on average sun shines in September in Casco?

The average sunshine in September in Casco is 8.6h.

What is the UV index intensity in September in Casco?

In Casco, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate health threat from unprotected exposure to the UV radiation.

Average temperature in September
Casco, WI

Average temperature in September - Casco, WI
  • Average high temperature in September: 68°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°F).

  • Average low temperature in September: 55.6°F

The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).

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Average pressure in September
Casco, WI

Average pressure in September - Casco, WI
  • Average pressure in September: 30.02"

The month with the highest atmospheric pressure is March (30.09").
The month with the lowest atmospheric pressure is June (29.91").

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Average wind speed in September
Casco, WI

Average wind speed in September - Casco, WI
  • Average wind speed in September: 9.6mph

The windiest month (with the highest average wind speed) is January (12.4mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).

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Average humidity in September
Casco, WI

Average humidity in September - Casco, WI
  • Average humidity in September: 78%

The month with the highest relative humidity is January (85%).
Months with the lowest relative humidity are April and May (76%).

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Average rainfall in September
Casco, WI

Average rainfall in September - Casco, WI
  • Average rainfall in September: 1.85"

The wettest month (with the highest rainfall) is May (2.91").
The driest month (with the least rainfall) is February (1.38").

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Average rainfall days in September
Casco, WI

Average rainfall days in September - Casco, WI
  • Average rainfall days in September: 13.2 days

The month with the highest number of rainy days is May (15.3 days).
Months with the least rainy days are January and February (4.2 days).

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Average snowfall in September
Casco, WI

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

The month with the highest snowfall is February (4.76").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Casco, WI

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

The month with the highest number of snowfall days is January (14.7 days).
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
Casco, WI

Average daylight in September / Average sunshine in September - Casco, WI
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.5h).
The month with the shortest days is December (Average daylight: 8.9h).

  • Average sunshine in September: 8.6h

The month with the most sunshine is July (Average sunshine: 10.3h).
Months with the least sunshine are January and February (Average sunshine: 3.2).

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Average sunshine days in September
Casco, WI

Average sunshine days in September - Casco, WI
  • Average sunshine days in September: 15.7 days

The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is February (11 days).

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Average UV index in September
Casco, WI

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

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in September
Casco, WI

Average cloud cover in September - Casco, WI
  • Average cloud cover in September: 33

The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is July (Cloud cover 29).

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Average visibility in September
Casco, WI

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

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

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