September weather forecast
Fond du Lac, WI

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Weather in September

Once September arrives, Fond du Lac subtly transitions into the fall season with temperatures dropping, nearing the lower end of the 60s°F. The sunlight hours begin to reduce, with approximately 8.6 sunlit hours per day. The city showcases a new palette, transitioning from vibrant summer green to a spectrum of yellows, oranges, and red. Water activities at the Lake become less preferred due to the cooling weather. Looking forward, October brings about even cooler temperatures, hinting at the onset of winter’s chill.

Temperature

The start of September signals a gentle decrease in the average high-temperature, transitioning from a warm 76.6°F (24.8°C) in August to a pleasant 69.6°F (20.9°C). Fond du Lac, in the month of September, anticipates a consistent average low-temperature of 52°F (11.1°C).

Humidity

The average relative humidity in September is 81%.

Rainfall

In September, the rain falls for 8.2 days. Throughout September, 0.63" (16mm) of precipitation is accumulated. Throughout the year, in Fond du Lac, there are 90.7 rainfall days, and 7.56" (192mm) of precipitation is accumulated.

Snowfall

In Fond du Lac, snow does not fall in May through September.

Daylight

In September, the average length of the day in Fond du Lac is 12h and 29min.
On the first day of the month, sunrise is at 6:18 am and sunset at 7:28 pm. On the last day of September, sunrise is at 6:51 am and sunset at 6:35 pm CDT.

Sunshine

In September, the average sunshine in Fond du Lac is 8.6h.

UV index

In Fond du Lac, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: An average maximum UV index of 3 in September leads to these recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. To guard against the harmful effects of the Sun, minimize exposure during midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
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Frequently asked questions

What is the average September temperature in Fond du Lac?

Fond du Lac in September has an average high-temperature of 69.6°F (20.9°C) and an average low-temperature of 52°F (11.1°C).

What is the average humidity in September in Fond du Lac?

In September, the average relative humidity in Fond du Lac is 81%.

How much does it rain in Fond du Lac in September?

In Fond du Lac, in September, during 8.2 rainfall days, 0.63" (16mm) of precipitation is typically accumulated.

When it does not snow in Fond du Lac?

May through September are months without snowfall in Fond du Lac.

Does it snow in Fond du Lac in September?

In Fond du Lac, Wisconsin, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in Fond du Lac?

The average day length in September in Fond du Lac, Wisconsin, is 12h and 29min.

When is the sunrise / sunset in September in Fond du Lac?

On the first day of September in Fond du Lac, sunrise is at 6:18 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:35 pm CDT.

How long on average sun shines in September in Fond du Lac?

The average sunshine duration in September is 8.6h.

What is the UV index reading in September in Fond du Lac?

In September, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a medium health risk from exposure to the Sun's UV radiation.
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
Fond du Lac, WI

Average temperature in September - Fond du Lac, WI
  • Average high temperature in September: 69.6°F

The warmest month (with the highest average high temperature) is July (77.4°F).
The month with the lowest average high temperature is January (22.5°F).

  • Average low temperature in September: 52°F

The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).

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Average pressure in September
Fond du Lac, WI

Average pressure in September - Fond du Lac, 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
Fond du Lac, WI

Average wind speed in September - Fond du Lac, WI
  • Average wind speed in September: 8mph

The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (7.1mph).

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Average humidity in September
Fond du Lac, WI

Average humidity in September - Fond du Lac, WI
  • Average humidity in September: 81%

The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is April (76%).

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Average rainfall in September
Fond du Lac, WI

Average rainfall in September - Fond du Lac, WI
  • Average rainfall in September: 0.63"

The wettest months (with the highest rainfall) are June and October (0.94").
The driest months (with the least rainfall) are January and February (0.31").

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Average rainfall days in September
Fond du Lac, WI

Average rainfall days in September - Fond du Lac, WI
  • Average rainfall days in September: 8.2 days

The months with the highest number of rainy days are April and July (11 days).
The month with the least rainy days is February (2.3 days).

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Average snowfall in September
Fond du Lac, WI

Average snowfall in September - Fond du Lac, WI
  • Average snowfall in September: 0"

The month with the highest snowfall is January (1.06").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Fond du Lac, WI

Average snowfall days in September - Fond du Lac, WI
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (10.5 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
Fond du Lac, WI

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

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • 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).

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Average sunshine days in September
Fond du Lac, WI

Average sunshine days in September - Fond du Lac, WI
  • Average sunshine days in September: 19.1 days

The month with the most sunshine days is December (21.5 days).
The month with the least sunshine days is June (15.6 days).

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Average UV index in September
Fond du Lac, WI

Average UV index in September - Fond du Lac, 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
Fond du Lac, WI

Average cloud cover in September - Fond du Lac, WI
  • Average cloud cover in September: 36

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

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Average visibility in September
Fond du Lac, WI

Average visibility in September - Fond du Lac, WI
  • Average visibility in September: 5mi

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

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Fond du Lac, Wisconsin, USA

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