September weather forecast
Baraboo, WI

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Weather in September

September announces the arrival of fall in Baraboo, with temperatures dipping to an average high of 70.9°F (21.6°C). The month is characterized by a decrease in humidity and a drop in rainfall to 0.75" (19mm), indicating a transition into the drier fall season. Days in September offer moderate temperatures and low rainfall frequency, indicating a lean towards an impending winter season. The city embraces the fall colours during this time. With cooler evenings, residents enjoy this transitional period from summer heat to fall chills.

Temperature

With the onset of September, Baraboo's climate undergoes a slight change as the average high-temperature moves from a warm 77.5°F (25.3°C) in August to an agreeable 70.9°F (21.6°C). An average low-temperature of 51.4°F (10.8°C) is anticipated throughout the nights in Baraboo during September.

Humidity

The average relative humidity in September is 80%.

Rainfall

In September, the rain falls for 8.2 days. Throughout September, 0.75" (19mm) of precipitation is accumulated. Throughout the year, there are 88.4 rainfall days, and 7.4" (188mm) of precipitation is accumulated.

Snowfall

In Baraboo, snow does not fall in May through September.

Daylight

In September, the average length of the day is 12h and 29min.
On the first day of September, sunrise is at 6:23 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:41 pm CDT.

Sunshine

In September, the average sunshine is 8.7h.

UV index

In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.
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 most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Updated: Aug 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are September temperatures in Baraboo?

September temperatures vary between a high-temperature of 70.9°F (21.6°C) and a low-temperature of 51.4°F (10.8°C).

What is the average humidity in September?

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

How much does it rain in September?

In Baraboo, during September, the rain falls for 8.2 days and regularly aggregates up to 0.75" (19mm) of precipitation.

When it does not snow?

In Baraboo, snow does not fall in May through September.

Does it snow in September?

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

How many hours of daylight does Baraboo have in September?

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

When is the sunrise / sunset in September in Baraboo?

On the first day of September, sunrise is at 6:23 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:41 pm CDT.

How many hours of sunshine does Baraboo have in September?

The average sunshine duration in September is 8.7h.

How high is the UV index in September?

In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a medium health risk from 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
Baraboo, WI

Average temperature in September - Baraboo, WI
  • Average high temperature in September: 70.9°F

The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (22.5°F).

  • Average low temperature in September: 51.4°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (10°F).

Average pressure in September
Baraboo, WI

Average pressure in September - Baraboo, WI
  • Average pressure in September: 30.03"Hg

The months with the highest atmospheric pressure are January and February (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in September
Baraboo, WI

Average wind speed in September - Baraboo, WI
  • Average wind speed in September: 7.5mph

The windiest month (with the highest average wind speed) is April (9.8mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).

Average humidity in September
Baraboo, WI

Average humidity in September - Baraboo, WI
  • Average humidity in September: 80%

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

Average rainfall in September
Baraboo, WI

Average rainfall in September - Baraboo, WI
  • Average rainfall in September: 0.75"

The wettest month (with the highest rainfall) is July (0.98").
The driest month (with the least rainfall) is January (0.28").

Average rainfall days in September
Baraboo, WI

Average rainfall days in September - Baraboo, WI
  • Average rainfall days in September: 8.2 days

The month with the highest number of rainy days is May (11.8 days).
The month with the least rainy days is February (2.2 days).

Average snowfall in September
Baraboo, WI

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

The month with the highest snowfall is January (1.38").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in September
Baraboo, WI

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

The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Baraboo, 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: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).

Average sunshine days in September
Baraboo, WI

Average sunshine days in September - Baraboo, WI
  • Average sunshine days in September: 19.9 days

The month with the most sunshine days is January (23.2 days).
The month with the least sunshine days is June (13.8 days).

Average UV index in September
Baraboo, WI

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

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

Average cloud cover in September
Baraboo, WI

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

The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 33).

Average visibility in September
Baraboo, WI

Average visibility in September - Baraboo, 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).

Baraboo, Wisconsin, USA

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