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
Casco observes a small decrease in the average high-temperature with the arrival of September, falling from August's moderately hot 75.6°F (24.2°C) to a pleasant 68°F (20°C). September generally records an average low-temperature of 55.6°F (13.1°C).Humidity
In September, the average relative humidity is 78%.Rainfall
In Casco, in September, it is raining for 13.2 days, with typically 1.85" (47mm) of accumulated precipitation. Throughout the year, there are 132.6 rainfall days, and 25.55" (649mm) of precipitation is accumulated.Snowfall
In Casco, Wisconsin, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 30min.On the first day of the month, sunrise is at 6:13 am and sunset at 7:26 pm. On the last day of September, sunrise is at 6:48 am and sunset at 6:32 pm CDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: A maximum daily UV index of 3 during September morphs into the following directions:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Casco?
What is the average humidity in September in Casco?
How much does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When are sunrise and sunset in September?
How many hours of sunshine does Casco have in September?
How high is the UV index in September?
Average temperature in September
Casco, WI
- Average high temperature in September: 68°F
The warmest month (with the highest average high temperature) is July (76.1°F).
The month with the lowest average high temperature is January (25°F).
- Average low temperature in September: 55.6°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).
Average pressure in September
Casco, WI
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Casco, WI
- Average wind speed in September: 9.6mph
The windiest month (with the highest average wind speed) is January (12.4mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).
Average humidity in September
Casco, WI
- Average humidity in September: 78%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are April and May (76%).
Average rainfall in September
Casco, WI
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is May (2.91").
The driest month (with the least rainfall) is February (1.38").
Average rainfall days in September
Casco, WI
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is May (15.3 days).
The months with the least rainy days are January and February (4.2 days).
Average snowfall in September
Casco, WI
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.76").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Casco, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Casco, WI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The months with the least sunshine are January and February (Average sunshine: 3h and 12min).
Average sunshine days in September
Casco, WI
- Average sunshine days in September: 15.7 days
The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is February (11 days).
Average UV index in September
Casco, WI
- Average UV index in September: 3
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).
Average cloud cover in September
Casco, WI
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in September
Casco, WI
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Casco, Wisconsin, USA
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