September weather forecastAndover, MN
September
Weather in September
September in Andover marks the arrival of autumn and sees a significant change in weather patterns. The days start getting shorter, and temperatures comfortably settle at 70.3°F (21.3°C). September is an excellent time of the year for outdoor activities as it offers beautiful fall views. Andover begins to transition into a vibrant display of fall colors. The mild weather paired with colorful nature forms an attractive landscape unique to this month.Temperature
Andover's September weather shows a modest shift in high-temperatures, falling from August's warm 78.1°F (25.6°C) to an agreeable 70.3°F (21.3°C). Throughout the month of September, Andover observes an average nighttime temperature of 52.5°F (11.4°C).Humidity
In September, the average relative humidity is 75%.Rainfall
In Andover, during September, the rain falls for 11.9 days and regularly aggregates up to 1.73" (44mm) of precipitation. In Andover, during the entire year, the rain falls for 119.8 days and collects up to 21.3" (541mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 31min.On the first day of the month, sunrise is at 6:35 am and sunset at 7:49 pm. On the last day of September, sunrise is at 7:11 am and sunset at 6:54 pm CDT.
Sunshine
In September, the average sunshine is 8.8h.UV index
The average daily maximum UV index in September in Andover is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Andover, MN
- Average high temperature in September: 70.3°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (19.2°F).
- Average low temperature in September: 52.5°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (7.2°F).
Average pressure in September
Andover, MN
- Average pressure in September: 30"Hg
The months with the highest atmospheric pressure are January and February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Andover, MN
- Average wind speed in September: 7.7mph
The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in September
Andover, 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 (71%).
Average rainfall in September
Andover, MN
- Average rainfall in September: 1.73"
The wettest month (with the highest rainfall) is June (3.74").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in September
Andover, MN
- Average rainfall days in September: 11.9 days
The month with the highest number of rainy days is June (16.8 days).
The month with the least rainy days is February (2 days).
Average snowfall in September
Andover, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.92").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Andover, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Andover, 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 12min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in September
Andover, MN
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is January (18.6 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in September
Andover, 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
Andover, 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
Andover, 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).
