September weather forecast
Racine, WI

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Weather in September

September heralds the arrival of autumn in Racine, Wisconsin. As summer warmth gradually dissipates, temperature noticeably decrease from those in August. There is a minor dip in sunshine hour, concomitant with shorter daylight hours. Winds start gaining strength again as the city bids farewell to the calm breezes of summer. Despite a minor increase in rainfall from August, the overall weather conditions are conducive for indulging in autumnal festivities.

Temperature

September marks a gentle change in average high-temperature in Racine, Wisconsin, declining from August's moderately hot 75°F (23.9°C) to an agreeable 69.1°F (20.6°C). Throughout September, Racine witnesses a consistent average low-temperature of 59.5°F (15.3°C).

Humidity

In Racine, the average relative humidity in September is 77%.

Rainfall

In Racine, during September, the rain falls for 10.6 days and regularly aggregates up to 0.91" (23mm) of precipitation. Throughout the year, there are 119.1 rainfall days, and 10.39" (264mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Racine.

Daylight

The average length of the day in September in Racine, Wisconsin, is 12h and 29min.
On the first day of September, sunrise is at 6:16 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:33 pm CDT.

Sunshine

In Racine, the average sunshine in September is 9.3h.

UV index

In Racine, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The daily high UV index of 4 in September translates into this advice:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.

Frequently asked questions

What is the temperature in September in Racine?

September temperatures in Racine, Wisconsin, vary between a high-temperature of 69.1°F (20.6°C) and a low-temperature of 59.5°F (15.3°C).

What is the average humidity in September in Racine?

In Racine, the average relative humidity in September is 77%.

How much does it rain in Racine in September?

In Racine, Wisconsin, in September, during 10.6 rainfall days, 0.91" (23mm) of precipitation is typically accumulated.

When it does not snow in Racine?

June through September are months without snowfall in Racine.

Does it snow in Racine in September?

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

How many hours of daylight does Racine have in September?

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

When is the sunrise / sunset in September in Racine?

On the first day of September in Racine, sunrise is at 6:16 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:33 pm CDT.

How many hours of sunshine does Racine have in September?

In September, the average sunshine duration in Racine, Wisconsin, is 9.3h.

How high is the UV index in September in Racine?

In Racine, Wisconsin, the average daily maximum UV index in September is 4. A UV Index value 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 daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Racine, WI

Average temperature in September - Racine, WI
  • Average high temperature in September: 69.1°F

The warmest month (with the highest average high temperature) is July (75.4°F).
The month with the lowest average high temperature is January (27.7°F).

  • Average low temperature in September: 59.5°F

The month with the highest average low temperature is August (66°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).

Average pressure in September
Racine, WI

Average pressure in September - Racine, 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 (29.92"Hg).

Average wind speed in September
Racine, WI

Average wind speed in September - Racine, WI
  • Average wind speed in September: 9.8mph

The windiest month (with the highest average wind speed) is January (13mph).
The calmest month (with the lowest average wind speed) is July (8mph).

Average humidity in September
Racine, WI

Average humidity in September - Racine, WI
  • Average humidity in September: 77%

The month with the highest relative humidity is January (84%).
The months with the lowest relative humidity are October and November (75%).

Average rainfall in September
Racine, WI

Average rainfall in September - Racine, WI
  • Average rainfall in September: 0.91"

The wettest month (with the highest rainfall) is May (1.34").
The driest month (with the least rainfall) is December (0.43").

Average rainfall days in September
Racine, WI

Average rainfall days in September - Racine, WI
  • Average rainfall days in September: 10.6 days

The month with the highest number of rainy days is May (13.7 days).
The month with the least rainy days is February (4.3 days).

Average snowfall in September
Racine, WI

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

The month with the highest snowfall is January (1.02").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Racine, WI

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

The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

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

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in September: 9h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).

Average sunshine days in September
Racine, WI

Average sunshine days in September - Racine, WI
  • Average sunshine days in September: 16 days

The month with the most sunshine days is December (18.7 days).
The month with the least sunshine days is July (13.5 days).

Average UV index in September
Racine, WI

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

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

Average cloud cover in September
Racine, WI

Average cloud cover in September - Racine, WI
  • Average cloud cover in September: 28

The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is July (Cloud cover 25).

Average visibility in September
Racine, WI

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

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

Racine, Wisconsin, USA

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