September weather forecastChaska, MN
September
Weather in September
September, the first month of the autumn in Chaska, is still a pleasant month, with an average temperature ranging between max 71.4°F (21.9°C) and min 53.4°F (11.9°C).Temperature
September marks a gentle change in average high-temperature, declining from August's warm 78.4°F (25.8°C) to an agreeable 71.4°F (21.9°C). Nighttime temperature experiences an average drop to a cool 53.4°F (11.9°C) in September.Humidity
In Chaska, the average relative humidity in September is 74%.Rainfall
In Chaska, in September, it is raining for 9.1 days, with typically 0.75" (19mm) of accumulated precipitation. In Chaska, during the entire year, the rain falls for 97.7 days and collects up to 9.61" (244mm) of precipitation.Snowfall
In Chaska, snow does not fall in May through September.Daylight
In September, the average length of the day is 12h and 31min.On the first day of September in Chaska, sunrise is at 6:37 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 6:56 pm CDT.
Sunshine
The average sunshine in September is 8.8h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: An average UV index of 4 in September transforms into this advice:
Guard yourself - Avoiding sunburn is suggested. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Chaska, MN
- Average high temperature in September: 71.4°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 (20.5°F).
- Average low temperature in September: 53.4°F
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (7.7°F).
Average pressure in September
Chaska, 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 (29.88"Hg).
Average wind speed in September
Chaska, MN
- Average wind speed in September: 7.8mph
The windiest month (with the highest average wind speed) is April (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in September
Chaska, 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 October (71%).
Average rainfall in September
Chaska, MN
- Average rainfall in September: 0.75"
The wettest month (with the highest rainfall) is June (1.57").
The driest month (with the least rainfall) is January (0.24").
Average rainfall days in September
Chaska, MN
- Average rainfall days in September: 9.1 days
The month with the highest number of rainy days is June (14.4 days).
The month with the least rainy days is February (1.4 days).
Average snowfall in September
Chaska, MN
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Chaska, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Chaska, MN
- Average daylight in September: 12h and 30min
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 48min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in September
Chaska, MN
- Average sunshine days in September: 18.6 days
The months with the most sunshine days are October, November and December (21.5 days).
The month with the least sunshine days is June (13.3 days).
Average UV index in September
Chaska, 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
Chaska, MN
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Chaska, 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).
