September weather forecast
Oak Creek, WI

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Weather in September

As summer gives way to fall, September in Oak Creek brings a mild reduction in temperature, with the average high and low being 69.6°F (20.9°C) and 58.3°F (14.6°C). This transition to cooler weather is smoothly marked by a gradual decrease in daylight hours. The autumnal equinox sees the foliage starting to change, injecting the city with vibrant colors. Despite the lower temperatures, rainfall continues to nourish the region. With its mild weather and lower humidity, September is an ideal time to experience the stunning colors of fall.

Temperature

September in Oak Creek sees a slight reduction in average high-temperature, with a shift from a warm 75.7°F (24.3°C) in August to an agreeable 69.6°F (20.9°C). During September nights, Oak Creek records an average temperature of 58.3°F (14.6°C).

Humidity

In Oak Creek, Wisconsin, the average relative humidity in September is 77%.

Rainfall

In September, in Oak Creek, Wisconsin, the rain falls for 12.1 days. Throughout September, 1.54" (39mm) of precipitation is accumulated. Throughout the year, in Oak Creek, Wisconsin, there are 131.9 rainfall days, and 18.54" (471mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall.

Daylight

In Oak Creek, the average length of the day in September is 12h and 29min.
On the first day of September in Oak Creek, 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

The average sunshine in September is 9.2h.

UV index

The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 4 during September translates into the following recommendations:
Undertake protective steps - Recommendations to avoid sunburn are issued. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
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Frequently asked questions

What are September temperatures in Oak Creek?

The high-temperature, in September, in Oak Creek, records 69.6°F (20.9°C), while the low-temperature is 58.3°F (14.6°C).

What is the average humidity in September in Oak Creek?

In September, the average relative humidity in Oak Creek, Wisconsin, is 77%.

How many days does it rain in September in Oak Creek?

In Oak Creek, during September, the rain falls for 12.1 days and regularly aggregates up to 1.54" (39mm) of precipitation.

When it does not snow in Oak Creek?

May through September are months without snowfall in Oak Creek.

Does it snow in Oak Creek in September?

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

What is the average length of the day in September in Oak Creek?

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

What time are sunrise and sunset in September in Oak Creek?

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

How many hours of sunshine does Oak Creek have in September?

In September, the average sunshine duration is 9.2h.

What is the UV index reading in September in Oak Creek?

In September, the average daily maximum UV index in Oak Creek, Wisconsin, is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJFMAMJJASeptemberOND
Aug
September
Oct
Average high temperature
75.7°F 24.3°C
69.6°F 20.9°C
57.2°F 14°C
Average low temperature
64.8°F 18.2°C
58.3°F 14.6°C
47.3°F 8.5°C
Average pressure
29.97" 761mmHg
30.03" 763mmHg
29.99" 762mmHg
Average wind speed
7.9mph 12.7km/h
9.3mph 15km/h
11.2mph 18km/h
Average max. wind speed
8.4mph 13.5km/h
9.6mph 15.4km/h
11.9mph 19.2km/h
Average wind speed gusts
12.6mph 20.3km/h
14.8mph 23.8km/h
17.3mph 27.8km/h
Average humidity
77%
77%
75%
Average rainfall
2.13" 54mm
1.54" 39mm
1.85" 47mm
Average rainfall days
15.4
12.1
13.1
Average snowfall
0" 0mm
0" 0mm
0.16" 4mm
Average snowfall days
0
0
0.6
Average daylight
13h 5min
12h 3min
11h 0min
Average sunshine
10h 3min
9h 1min
5h 3min
Average sunshine days
12.7
14.5
15
Average UV index
5
4
2
Average cloud cover
27%
29%
44%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in September
Oak Creek, WI

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

The warmest month (with the highest average high temperature) is July (75.9°F).
The month with the lowest average high temperature is January (27°F).

  • Average low temperature in September: 58.3°F

The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (18°F).

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Average pressure in September
Oak Creek, WI

Average pressure in September - Oak Creek, 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).

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Average wind speed in September
Oak Creek, WI

Average wind speed in September - Oak Creek, WI
  • Average wind speed in September: 9.3mph

The windiest month (with the highest average wind speed) is January (12.6mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).

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Average humidity in September
Oak Creek, WI

Average humidity in September - Oak Creek, 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%).

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Average rainfall in September
Oak Creek, WI

Average rainfall in September - Oak Creek, WI
  • Average rainfall in September: 1.54"

The wettest month (with the highest rainfall) is July (2.4").
The driest month (with the least rainfall) is February (0.75").

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Average rainfall days in September
Oak Creek, WI

Average rainfall days in September - Oak Creek, WI
  • Average rainfall days in September: 12.1 days

The month with the highest number of rainy days is July (16.1 days).
The month with the least rainy days is February (4.3 days).

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Average snowfall in September
Oak Creek, WI

Average snowfall in September - Oak Creek, WI
  • Average snowfall in September: 0"

The month with the highest snowfall is January (2.01").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Oak Creek, WI

Average snowfall days in September - Oak Creek, WI
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (13.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Oak Creek, WI

Average daylight in September / Average sunshine in September - Oak Creek, 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 1min

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

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Average sunshine days in September
Oak Creek, WI

Average sunshine days in September - Oak Creek, WI
  • Average sunshine days in September: 14.5 days

The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is July (11.6 days).

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Average UV index in September
Oak Creek, WI

Average UV index in September - Oak Creek, 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 and December (UV index 1).

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Average cloud cover in September
Oak Creek, WI

Average cloud cover in September - Oak Creek, 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 27).

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Average visibility in September
Oak Creek, WI

Average visibility in September - Oak Creek, 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).

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Oak Creek, Wisconsin, USA

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