September weather forecastCoon Rapids, MN
September
Weather in September
September marks the nostalgic transition from summer to fall in Coon Rapids. Cold weather creeps back in gradually as temperatures dip to a high of 70.7°F (21.5°C) and a low of 53.2°F (11.8°C). The city's color palette gradually shifts from the rich greens of summer to the warm hues of autumn. A marked decrease in sunlight hours signifies a shift from the sun-bathed days of summer. Even so, September manages to maintain a generally clear sky, rarely interrupted by clouds.Temperature
September signifies a gentle decline in Coon Rapids's average high-temperature, easing from a moderately hot 78.6°F (25.9°C) in August to a pleasant 70.7°F (21.5°C). Coon Rapids, in September, witnesses an average low-temperature of 53.2°F (11.8°C).Humidity
The average relative humidity in September is 74%.Rainfall
In Coon Rapids, in September, it is raining for 11.8 days, with typically 1.77" (45mm) of accumulated precipitation. Throughout the year, there are 121.2 rainfall days, and 21.97" (558mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day in Coon Rapids is 12h and 31min.On the first day of September in Coon Rapids, sunrise is at 6:35 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 6:54 pm CDT.
Sunshine
In Coon Rapids, the average sunshine in September is 8.8h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.Note: In September, the maximum UV index of 4 transforms into these recommendations:
Undertake precautions - Obligation exists to protect against skin and eye damage. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Coon Rapids, MN
- Average high temperature in September: 70.7°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (19.9°F).
- Average low temperature in September: 53.2°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (7.3°F).
Average pressure in September
Coon Rapids, MN
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Coon Rapids, MN
- Average wind speed in September: 7.7mph
The windiest month (with the highest average wind speed) is April (9.2mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in September
Coon Rapids, MN
- Average humidity in September: 74%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are April and May (71%).
Average rainfall in September
Coon Rapids, MN
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is June (3.78").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in September
Coon Rapids, MN
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is June (16.2 days).
The month with the least rainy days is January (2.8 days).
Average snowfall in September
Coon Rapids, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (5.16").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Coon Rapids, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Coon Rapids, MN
- Average daylight in September: 12h and 30min
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 48min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in September
Coon Rapids, MN
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is January (17.8 days).
The month with the least sunshine days is June (10.7 days).
Average UV index in September
Coon Rapids, 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
Coon Rapids, MN
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 31).
Average visibility in September
Coon Rapids, 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).
