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
The arrival of September correlates with a minor temperature reduction, down from August's warm 76.8°F (24.9°C) to a pleasant 69.1°F (20.6°C). Cornell experiences a consistent average temperature of 49.8°F (9.9°C) throughout the nights in September.Humidity
In September, the average relative humidity in Cornell, Wisconsin, is 80%.Rainfall
In Cornell, in September, it is raining for 12.2 days, with typically 1.85" (47mm) of accumulated precipitation. Throughout the year, in Cornell, there are 135.6 rainfall days, and 25.71" (653mm) of precipitation is accumulated.Snowfall
In Cornell, snow does not fall in June through September.Daylight
In Cornell, Wisconsin, the average length of the day in September is 12h and 31min.On the first day of September, sunrise is at 6:27 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:46 pm CDT.
Sunshine
The average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: The UV index of 4 in September translates into these instructions:
Be vigilant - Preventing sunburn is recommended. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Cornell?
What is the average humidity in September in Cornell?
How many days does it rain in September in Cornell?
When it does not snow in Cornell?
Does it snow in Cornell in September?
How many hours of daylight does Cornell have in September?
What time are sunrise and sunset in September in Cornell?
How many hours of sunshine does Cornell have in September?
What is the UV index intensity in September in Cornell?
Average temperature in September
Cornell, WI
- Average high temperature in September: 69.1°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (18.7°F).
- Average low temperature in September: 49.8°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (5.9°F).
Average pressure in September
Cornell, WI
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is February (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Cornell, WI
- Average wind speed in September: 7.5mph
The windiest month (with the highest average wind speed) is April (9mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity in September
Cornell, WI
- Average humidity in September: 80%
The months with the highest relative humidity are January and February (92%).
The month with the lowest relative humidity is May (76%).
Average rainfall in September
Cornell, WI
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is June (4.06").
The driest month (with the least rainfall) is January (0.98").
Average rainfall days in September
Cornell, WI
- Average rainfall days in September: 12.2 days
The months with the highest number of rainy days are May and June (17.6 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in September
Cornell, WI
- Average snowfall in September: 0"
The month with the highest snowfall is February (7.36").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Cornell, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (19 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Cornell, WI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is February (Average sunshine: 2h and 48min).
Average sunshine days in September
Cornell, WI
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is September (16.3 days).
The month with the least sunshine days is June (10.1 days).
Average UV index in September
Cornell, WI
- Average UV index in September: 4
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).
Average cloud cover in September
Cornell, WI
- Average cloud cover in September: 38
The months with the most cloud cover are January and February (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Cornell, WI
- Average visibility in September: 5mi
The months with the highest visibility are April, May, June, October and November (6mi).
The months with the lowest visibility are January and February (4mi).
Cornell, Wisconsin, USA
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