Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Transitioning from August to September involves a subtle drop in average high-temperatures, descending from a moderately hot 77.4°F (25.2°C) to a pleasant 71.1°F (21.7°C). Throughout the month of September, the nighttime temperature in Oconomowoc dips to an average of 52.7°F (11.5°C).Humidity
The average relative humidity in September is 81%.Rainfall
In Oconomowoc, in September, during 10.5 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. In Oconomowoc, Wisconsin, during the entire year, the rain falls for 117.9 days and collects up to 13.82" (351mm) of precipitation.Snowfall
May through September are months without snowfall in Oconomowoc.Daylight
In Oconomowoc, the average length of the day in September is 12h and 29min.On the first day of September, sunrise is at 6:19 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:36 pm CDT.
Sunshine
In September, the average sunshine in Oconomowoc is 8.6h.UV index
The average daily maximum UV index in September in Oconomowoc is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: In September, a daily maximum UV index of 3 leads to the following instructions:
Undertake precautions - It is suggested to shield oneself from sunburn. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Oconomowoc?
What is the average humidity in September in Oconomowoc?
How much does it rain in Oconomowoc in September?
When it does not snow in Oconomowoc?
Does it snow in Oconomowoc in September?
How many hours of daylight does Oconomowoc have in September?
When is the sunrise / sunset in September in Oconomowoc?
How many hours of sunshine does Oconomowoc have in September?
What is the UV index reading in September in Oconomowoc?
Average temperature in September
Oconomowoc, WI
- Average high temperature in September: 71.1°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (24.3°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (12.2°F).
Average pressure in September
Oconomowoc, WI
- Average pressure in September: 30.03"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
Oconomowoc, WI
- Average wind speed in September: 7.4mph
The windiest month (with the highest average wind speed) is April (10mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in September
Oconomowoc, WI
- Average humidity in September: 81%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (76%).
Average rainfall in September
Oconomowoc, WI
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is July (1.85").
The driest months (with the least rainfall) are February and December (0.59").
Average rainfall days in September
Oconomowoc, WI
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is July (14.7 days).
The month with the least rainy days is January (2.8 days).
Average snowfall in September
Oconomowoc, WI
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Oconomowoc, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Oconomowoc, 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: 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 18min).
Average sunshine days in September
Oconomowoc, WI
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is July (11.7 days).
Average UV index in September
Oconomowoc, WI
- Average UV index in September: 3
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in September
Oconomowoc, WI
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 65).
The months with the least cloud cover are July, August and September (Cloud cover 34).
Average visibility in September
Oconomowoc, 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).
Oconomowoc, Wisconsin, USA
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