September weather forecastDonaldson, MN
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Donaldson, Minnesota, with an average temperature varying between 68.9°F (20.5°C) and 50.7°F (10.4°C).Temperature
With September's arrival, Donaldson's weather changes as the average high-temperature falls from a moderately hot 79.3°F (26.3°C) in August to an agreeable 68.9°F (20.5°C). Donaldson records a mean low-temperature of 50.7°F (10.4°C) in September.Humidity
In Donaldson, the average relative humidity in September is 64%.Rainfall
In September, in Donaldson, the rain falls for 10 days. Throughout September, 1.81" (46mm) of precipitation is accumulated. In Donaldson, during the entire year, the rain falls for 100.4 days and collects up to 15.91" (404mm) of precipitation.Snowfall
In Donaldson, Minnesota, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 34min.On the first day of the month, sunrise is at 6:45 am and sunset at 8:08 pm. On the last day of September, sunrise is at 7:26 am and sunset at 7:07 pm CDT.
Sunshine
The average sunshine in September in Donaldson, Minnesota, is 8.5h.UV index
In September, the average daily maximum UV index in Donaldson, Minnesota, is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: During September, 4 as the daily maximum UV index converts into the following advice:
Take necessary precautions - Suggestions to elude sunburn are provided. When the Sun is at its strongest around midday, find shade and limit exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Donaldson, MN
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is August (79.3°F).
The month with the lowest average high temperature is January (13.6°F).
- Average low temperature in September: 50.7°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (-0.8°F).
Average pressure in September
Donaldson, MN
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Donaldson, MN
- Average wind speed in September: 9.6mph
The windiest month (with the highest average wind speed) is October (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (8.1mph).
Average humidity in September
Donaldson, MN
- Average humidity in September: 64%
The months with the highest relative humidity are January and February (92%).
The month with the lowest relative humidity is August (61%).
Average rainfall in September
Donaldson, MN
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is June (2.72").
The driest month (with the least rainfall) is February (0.47").
Average rainfall days in September
Donaldson, MN
- Average rainfall days in September: 10 days
The month with the highest number of rainy days is June (16.2 days).
The months with the least rainy days are February and December (1.9 days).
Average snowfall in September
Donaldson, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.25").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Donaldson, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Donaldson, MN
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in September: 8h and 30min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in September
Donaldson, MN
- Average sunshine days in September: 17.7 days
The month with the most sunshine days is August (19.1 days).
The month with the least sunshine days is June (10.2 days).
Average UV index in September
Donaldson, 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
Donaldson, MN
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 72).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in September
Donaldson, 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).
