September weather forecast
Spring Green, WI

Weather in September

September, the first month of the autumn in Spring Green, is still a pleasant month, with an average temperature fluctuating between 71.4°F (21.9°C) and 51.3°F (10.7°C).

Temperature

In Spring Green, the average high-temperature in September slightly decreases from a warm 78.4°F (25.8°C) in August to a pleasant 71.4°F (21.9°C). The average low-temperature, in Spring Green, is 51.3°F (10.7°C).

Humidity

The average relative humidity in September in Spring Green is 80%.

Rainfall

In Spring Green, during 10.9 rainfall days, 1.89" (48mm) of precipitation is typically accumulated. In Spring Green, during the entire year, the rain falls for 122.9 days and collects up to 17.76" (451mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

The average length of the day in September is 12h and 29min.
On the first day of September in Spring Green, sunrise is at 6:24 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:43 pm CDT.

Sunshine

The average sunshine in September is 8.8h.

UV index

In Spring Green, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 3 in September transform into the following instructions:
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 average humidity in September in Spring Green?

In September, the average relative humidity in Spring Green is 80%.

How many days does it rain in September in Spring Green?

In Spring Green, Wisconsin, during September, the rain falls for 10.9 days and regularly aggregates up to 1.89" (48mm) of precipitation.

When it does not snow in Spring Green?

May through September are months without snowfall in Spring Green, Wisconsin.

Does it snow in Spring Green in September?

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

What is the average length of the day in September in Spring Green?

The average day length in September in Spring Green, Wisconsin, is 12h and 29min.

When are sunrise and sunset in September in Spring Green?

In September, on the first day of the month, sunrise is at 6:24 am and sunset at 7:35 pm. On the last day of the month, in Spring Green, Wisconsin, sunrise is at 6:56 am and sunset at 6:43 pm CDT.

How long on average sun shines in September in Spring Green?

In Spring Green, Wisconsin, the average sunshine duration in September is 8.8h.

What is the UV index intensity in September in Spring Green?

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

Average temperature in September
Spring Green, WI

Average temperature in September - Spring Green, WI
  • Average high temperature in September: 71.4°F

The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (23.4°F).

  • Average low temperature in September: 51.3°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°F).

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Average pressure in September
Spring Green, WI

Average pressure in September - Spring Green, WI
  • Average pressure in September: 30.02"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

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Average wind speed in September
Spring Green, WI

Average wind speed in September - Spring Green, WI
  • Average wind speed in September: 7.3mph

The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).

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Average humidity in September
Spring Green, WI

Average humidity in September - Spring Green, WI
  • Average humidity in September: 80%

The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is April (77%).

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Average rainfall in September
Spring Green, WI

Average rainfall in September - Spring Green, WI
  • Average rainfall in September: 1.89"

The wettest month (with the highest rainfall) is July (2.32").
The driest month (with the least rainfall) is January (0.63").

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Average rainfall days in September
Spring Green, WI

Average rainfall days in September - Spring Green, WI
  • Average rainfall days in September: 10.9 days

The month with the highest number of rainy days is June (16.3 days).
The month with the least rainy days is January (3.2 days).

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Average snowfall in September
Spring Green, WI

Average snowfall in September - Spring Green, WI
  • Average snowfall in September: 0"

The month with the highest snowfall is February (2.91").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Spring Green, WI

Average snowfall days in September - Spring Green, WI
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (13 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
Spring Green, WI

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

The month with the longest days is June (Average daylight: 15h and 20min).
The month with the shortest days is December (Average daylight: 9h and 3min).

  • Average sunshine in September: 8.8h

The month with the most sunshine is July (Average sunshine: 9.9h).
The month with the least sunshine is January (Average sunshine: 3.2h).

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Average sunshine days in September
Spring Green, WI

Average sunshine days in September - Spring Green, WI
  • Average sunshine days in September: 17.6 days

The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is June (10.9 days).

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Average UV index in September
Spring Green, WI

Average UV index in September - Spring Green, WI
  • Average UV index in September: 3

The months with the highest UV index are 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
Spring Green, WI

Average cloud cover in September - Spring Green, WI
  • Average cloud cover in September: 35

The month with the most cloud cover is January (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 34).

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Average visibility in September
Spring Green, WI

Average visibility in September - Spring Green, WI
  • Average visibility in September: 5mi

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

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