September weather forecast
Plainfield, WI

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Weather in September

The first month of the autumn, September, is also an agreeable month in Plainfield, Wisconsin, with an average temperature ranging between max 69.6°F (20.9°C) and min 51.6°F (10.9°C).

Temperature

The start of September comes with a small reduction in the average high-temperature, subtly receding from a warm 77.2°F (25.1°C) in August to an agreeable 69.6°F (20.9°C). Plainfield's temperature drops to an average low of 51.6°F (10.9°C) during the nights of September.

Humidity

In September, the average relative humidity is 80%.

Rainfall

In Plainfield, during September, the rain falls for 12 days and regularly aggregates up to 2.01" (51mm) of precipitation. In Plainfield, during the entire year, the rain falls for 131 days and collects up to 26.42" (671mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

The average length of the day in September in Plainfield is 12h and 30min.
On the first day of September, sunrise is at 6:21 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:39 pm CDT.

Sunshine

In Plainfield, the average sunshine in September is 8.6h.

UV index

In Plainfield, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A daily high UV index of 3 in September leads to these guidelines:
Guard yourself - An obligation to protect skin and eyes from harm exists. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Tightly woven clothing, when worn loosely, shields effectively against the Sun.

Frequently asked questions

What is the usual temperature for Plainfield in September?

The high-temperature during September is 69.6°F (20.9°C) and the low-temperature is 51.6°F (10.9°C).

What is the average humidity in September?

The average relative humidity in September is 80%.

How many days does it rain in September?

In Plainfield, during September, the rain falls for 12 days and regularly aggregates up to 2.01" (51mm) of precipitation.

When it does not snow?

June through September are months without snowfall.

Does it snow in September?

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

What is the average length of the day in September?

The average day length in September is 12h and 30min.

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:21 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:39 pm CDT.

How long on average sun shines in September?

The average sunshine duration in September is 8.6h.

What is the UV index intensity in September?

In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Plainfield, WI

Average temperature in September - Plainfield, WI
  • Average high temperature in September: 69.6°F

The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (21.7°F).

  • Average low temperature in September: 51.6°F

The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (10.4°F).

Average pressure in September
Plainfield, WI

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

The months with the highest atmospheric pressure are January and February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in September
Plainfield, WI

Average wind speed in September - Plainfield, WI
  • Average wind speed in September: 7.7mph

The windiest month (with the highest average wind speed) is April (10mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).

Average humidity in September
Plainfield, WI

Average humidity in September - Plainfield, 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 (75%).

Average rainfall in September
Plainfield, WI

Average rainfall in September - Plainfield, WI
  • Average rainfall in September: 2.01"

The wettest month (with the highest rainfall) is May (3.43").
The driest months (with the least rainfall) are January and February (1.22").

Average rainfall days in September
Plainfield, WI

Average rainfall days in September - Plainfield, WI
  • Average rainfall days in September: 12 days

The month with the highest number of rainy days is May (16.4 days).
The month with the least rainy days is February (4 days).

Average snowfall in September
Plainfield, WI

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

The month with the highest snowfall is January (5.87").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Plainfield, WI

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

The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Plainfield, WI
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in September: 8h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).

Average sunshine days in September
Plainfield, WI

Average sunshine days in September - Plainfield, WI
  • Average sunshine days in September: 16.1 days

The month with the most sunshine days is November (16.6 days).
The months with the least sunshine days are April and June (11.9 days).

Average UV index in September
Plainfield, WI

Average UV index in September - Plainfield, 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).

Average cloud cover in September
Plainfield, WI

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

The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 33).

Average visibility in September
Plainfield, WI

Average visibility in September - Plainfield, 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).

Plainfield, Wisconsin, USA

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