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 transition into September subtly indicates a reduction in the average high-temperature, down to an agreeable 68.9°F (20.5°C) from August's moderately hot 76.6°F (24.8°C). An average low-temperature of 49.5°F (9.7°C) is anticipated throughout the nights during September.Humidity
The average relative humidity in September is 80%.Rainfall
In Island Lake, during September, the rain falls for 13.2 days and regularly aggregates up to 1.85" (47mm) of precipitation. Throughout the year, in Island Lake, there are 137.4 rainfall days, and 26.26" (667mm) of precipitation is accumulated.Snowfall
In Island Lake, snow does not fall in June through September.Daylight
In Island Lake, the average length of the day in September is 12h and 31min.On the first day of September, sunrise is at 6:28 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:47 pm CDT.
Sunshine
In Island Lake, the average sunshine in September is 8.4h.UV index
The average daily maximum UV index in September in Island Lake is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 4 in September interprets into the following recommendations:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Frequently asked questions
What are September temperatures in Island Lake?
What is the average humidity in September in Island Lake?
How many days does it rain in September in Island Lake?
When it does not snow in Island Lake?
Does it snow in Island Lake in September?
How many hours of daylight does Island Lake have in September?
What time are sunrise and sunset in September in Island Lake?
How long on average sun shines in September in Island Lake?
What is the UV index reading in September in Island Lake?
Average temperature in September
Island Lake, WI
- Average high temperature in September: 68.9°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: 49.5°F
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (6.1°F).
Average pressure in September
Island Lake, WI
- Average pressure in September: 30.01"Hg
The months with the highest atmospheric pressure are January and February (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Island Lake, WI
- Average wind speed in September: 7.5mph
The windiest month (with the highest average wind speed) is April (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity in September
Island 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 (76%).
Average rainfall in September
Island Lake, 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 (0.94").
Average rainfall days in September
Island Lake, WI
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is May (18.3 days).
The months with the least rainy days are January and February (3.7 days).
Average snowfall in September
Island Lake, WI
- Average snowfall in September: 0"
The month with the highest snowfall is February (7.44").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Island Lake, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (17.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Island Lake, 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 2min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The months with the least sunshine are January and February (Average sunshine: 2h and 48min).
Average sunshine days in September
Island Lake, WI
- Average sunshine days in September: 14.1 days
The month with the most sunshine days is October (15.6 days).
The month with the least sunshine days is June (9.3 days).
Average UV index in September
Island Lake, 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
Island Lake, WI
- Average cloud cover in September: 38
The months with the most cloud cover are January and February (Cloud cover 72).
The months with the least cloud cover are July and August (Cloud cover 36).
Average visibility in September
Island Lake, 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).
Island Lake, Wisconsin, USA
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