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 is accompanied by a slight temperature decrease, with the average high-temperature shifting from a warm 78.3°F (25.7°C) in August to a pleasant 72.1°F (22.3°C). Nighttime temperatures hover around an average low of 52.7°F (11.5°C) in September.Humidity
In Green Isle, the average relative humidity in September is 75%.Rainfall
In Green Isle, in September, during 11.8 rainfall days, 2.13" (54mm) of precipitation is typically accumulated. In Green Isle, during the entire year, the rain falls for 123.7 days and collects up to 23.98" (609mm) of precipitation.Snowfall
In Green Isle, snow does not fall in June through September.Daylight
The average length of the day in September in Green Isle is 12h and 30min.On the first day of the month, sunrise is at 6:39 am and sunset at 7:52 pm. On the last day of September, in Green Isle, Minnesota, sunrise is at 7:13 am and sunset at 6:57 pm CDT.
Sunshine
In Green Isle, the average sunshine in September is 8.8h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Undertake protective steps - Recommendations to avoid sunburn are issued. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Green Isle?
What is the average humidity in September in Green Isle?
How much does it rain in Green Isle in September?
When it does not snow in Green Isle?
Does it snow in Green Isle in September?
What is the average length of the day in September in Green Isle?
When is the sunrise / sunset in September in Green Isle?
How long on average sun shines in September in Green Isle?
How high is the UV index in September in Green Isle?
Average temperature in September
Green Isle, MN
- Average high temperature in September: 72.1°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (20.7°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (7°F).
Average pressure in September
Green Isle, MN
- Average pressure in September: 30"Hg
The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Green Isle, MN
- Average wind speed in September: 8.1mph
The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in September
Green Isle, MN
- Average humidity in September: 75%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is April (70%).
Average rainfall in September
Green Isle, MN
- Average rainfall in September: 2.13"
The wettest month (with the highest rainfall) is June (3.7").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days in September
Green Isle, MN
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is February (2.4 days).
Average snowfall in September
Green Isle, MN
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Green Isle, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Green Isle, MN
- 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 5min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in September
Green Isle, MN
- Average sunshine days in September: 16.2 days
The month with the most sunshine days is October (18.4 days).
The month with the least sunshine days is June (10 days).
Average UV index in September
Green Isle, MN
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Green Isle, MN
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Green Isle, MN
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Green Isle, Minnesota, USA
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