September weather forecast
Richfield, WI

Weather in September

The first month of the autumn, September, is still a pleasant month in Richfield, Wisconsin, with an average temperature ranging between min 55.4°F (13°C) and max 70°F (21.1°C).

Temperature

In Richfield, the average high-temperature in September marginally drops from a moderately hot 76.6°F (24.8°C) in August to a pleasant 70°F (21.1°C). The average low-temperature, in Richfield, is 55.4°F (13°C).

Humidity

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

Rainfall

In September, the rain falls for 12.4 days. Throughout September, 2.17" (55mm) of precipitation is accumulated. Throughout the year, there are 139.2 rainfall days, and 25.28" (642mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall.

Daylight

The average length of the day in September in Richfield is 12h and 29min.
On the first day of September in Richfield, Wisconsin, sunrise is at 6:17 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:36 pm CDT.

Sunshine

In Richfield, the average sunshine in September is 9.2h.

UV index

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the average humidity in September in Richfield?

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

How many days does it rain in September in Richfield?

In Richfield, Wisconsin, in September, during 12.4 rainfall days, 2.17" (55mm) of precipitation is typically accumulated.

When it does not snow in Richfield?

May through September are months without snowfall.

Does it snow in Richfield in September?

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

What is the average length of the day in September in Richfield?

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

What time are sunrise and sunset in September in Richfield?

On the first day of September in Richfield, sunrise is at 6:17 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:36 pm CDT.

How many hours of sunshine does Richfield have in September?

In Richfield, the average sunshine duration in September is 9.2h.

How high is the UV index in September in Richfield?

The average daily maximum UV index in September in Richfield, Wisconsin, is 4. A UV Index of 3 to 5 symbolizes a medium health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Richfield, WI

Average temperature in September - Richfield, WI
  • Average high temperature in September: 70°F

The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (25.2°F).

  • Average low temperature in September: 55.4°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).

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Average pressure in September
Richfield, WI

Average pressure in September - Richfield, 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 (29.91"Hg).

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Average wind speed in September
Richfield, WI

Average wind speed in September - Richfield, WI
  • Average wind speed in September: 8.2mph

The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).

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Average humidity in September
Richfield, WI

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

The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (76%).

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Average rainfall in September
Richfield, WI

Average rainfall in September - Richfield, WI
  • Average rainfall in September: 2.17"

The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is February (1.02").

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Average rainfall days in September
Richfield, WI

Average rainfall days in September - Richfield, WI
  • Average rainfall days in September: 12.4 days

The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (4.1 days).

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Average snowfall in September
Richfield, WI

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

The month with the highest snowfall is January (4.02").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Richfield, WI

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

The month with the highest number of snowfall days is January (12.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Richfield, 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 2min).

  • Average sunshine in September: 9h and 12min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).

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Average sunshine days in September
Richfield, WI

Average sunshine days in September - Richfield, WI
  • Average sunshine days in September: 15.4 days

The month with the most sunshine days is December (15.9 days).
The month with the least sunshine days is April (12 days).

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Average UV index in September
Richfield, WI

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

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

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Average cloud cover in September
Richfield, WI

Average cloud cover in September - Richfield, WI
  • Average cloud cover in September: 29

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
Richfield, WI

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

The 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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