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
As August makes way for September, Isle's average high-temperature eases from a warm 76.8°F (24.9°C) to an agreeable 68.7°F (20.4°C). In the month of September, the average temperature dips to a chilly 49.5°F (9.7°C) during the night.Humidity
In Isle, the average relative humidity in September is 75%.Rainfall
In Isle, in September, during 10.2 rainfall days, 1.26" (32mm) of precipitation is typically accumulated. In Isle, during the entire year, the rain falls for 109.6 days and collects up to 15.83" (402mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 32min.On the first day of September, sunrise is at 6:35 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 6:55 pm CDT.
Sunshine
The average sunshine in September is 8.6h.UV index
In September, the average daily maximum UV index in Isle is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 4 in September translates into these instructions:
Ensure safety - Recommendations to avert sunburn are presented. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How many days 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 Isle have in September?
What is the UV index intensity in September?
Average temperature in September
Isle, MN
- Average high temperature in September: 68.7°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 (17.4°F).
- Average low temperature in September: 49.5°F
The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is January (4.3°F).
Average pressure in September
Isle, MN
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Isle, MN
- Average wind speed in September: 7.8mph
The windiest month (with the highest average wind speed) is April (8.5mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).
Average humidity in September
Isle, MN
- Average humidity in September: 75%
The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is May (72%).
Average rainfall in September
Isle, MN
- Average rainfall in September: 1.26"
The wettest month (with the highest rainfall) is June (2.36").
The driest month (with the least rainfall) is January (0.35").
Average rainfall days in September
Isle, MN
- Average rainfall days in September: 10.2 days
The month with the highest number of rainy days is June (15.2 days).
The month with the least rainy days is February (2.4 days).
Average snowfall in September
Isle, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.41").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Isle, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (17.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Isle, MN
- Average daylight in September: 12h and 3min
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: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).
Average sunshine days in September
Isle, MN
- Average sunshine days in September: 17.4 days
The month with the most sunshine days is October (18.1 days).
The month with the least sunshine days is June (11 days).
Average UV index in September
Isle, MN
- Average UV index in September: 4
The month with the highest UV index is 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
Isle, MN
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in September
Isle, MN
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
Isle, Minnesota, USA
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