September weather forecastStar Lake, WI
September
Weather in September
September, the first month of the autumn in Star Lake, is still a refreshing month, with an average temperature fluctuating between 48.6°F (9.2°C) and 66.9°F (19.4°C).Temperature
With the onset of September, the average high-temperature subtly recedes from August's warm 74.7°F (23.7°C) to a refreshing 66.9°F (19.4°C). Throughout the month of September, the average temperature in Star Lake dips to a chilly 48.6°F (9.2°C) at night.Humidity
The average relative humidity in September in Star Lake, Wisconsin, is 80%.Rainfall
In Star Lake, in September, during 14.2 rainfall days, 1.69" (43mm) of precipitation is typically accumulated. Throughout the year, there are 128.5 rainfall days, and 24.76" (629mm) of precipitation is accumulated.Snowfall
In Star Lake, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 6:19 am and sunset at 7:35 pm. On the last day of September, in Star Lake, sunrise is at 6:56 am and sunset at 6:39 pm CDT.
Sunshine
In Star Lake, the average sunshine in September is 7.9h.UV index
In Star Lake, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 3 during September translates into the following directions:
Heed the precautions - Suggestions to avoid sunburn are made. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Star Lake, WI
- Average high temperature in September: 66.9°F
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is January (18.5°F).
- Average low temperature in September: 48.6°F
The month with the highest average low temperature is July (56.3°F).
The coldest month (with the lowest average low temperature) is January (7.9°F).
Average pressure in September
Star Lake, WI
- Average pressure in September: 30.01"Hg
The months with the highest atmospheric pressure are February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Star Lake, WI
- Average wind speed in September: 7.5mph
The windiest month (with the highest average wind speed) is November (8.7mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).
Average humidity in September
Star Lake, 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 (71%).
Average rainfall in September
Star Lake, WI
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is May (2.95").
The driest month (with the least rainfall) is January (1.38").
Average rainfall days in September
Star Lake, WI
- Average rainfall days in September: 14.2 days
The month with the highest number of rainy days is June (15.8 days).
The month with the least rainy days is February (2.7 days).
Average snowfall in September
Star Lake, WI
- Average snowfall in September: 0"
The month with the highest snowfall is December (11.18").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Star Lake, WI
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (26.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Star Lake, WI
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 7h and 54min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 1h and 54min).
Average sunshine days in September
Star Lake, WI
- Average sunshine days in September: 13.4 days
The month with the most sunshine days is September (13.4 days).
The month with the least sunshine days is January (5 days).
Average UV index in September
Star Lake, WI
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, March, November and December (UV index 1).
Average cloud cover in September
Star Lake, WI
- Average cloud cover in September: 44
The month with the most cloud cover is January (Cloud cover 83).
The month with the least cloud cover is July (Cloud cover 37).
Average visibility in September
Star Lake, WI
- Average visibility in September: 5mi
The months with the highest visibility are May, June and July (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
