September weather forecastUnderwood, MN
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Underwood, Minnesota, with an average temperature fluctuating between 51.6°F (10.9°C) and 70.7°F (21.5°C).Temperature
September's arrival subtly correlates with a reduction in the average high-temperature, down from a warm 79.3°F (26.3°C) in August to an agreeable 70.7°F (21.5°C). In Underwood, an average low-temperature of 51.6°F (10.9°C) is recorded during September nights.Humidity
In Underwood, Minnesota, the average relative humidity in September is 67%.Rainfall
In September, the rain falls for 10.6 days. Throughout September, 1.65" (42mm) of precipitation is accumulated. Throughout the year, there are 116.9 rainfall days, and 21.54" (547mm) of precipitation is accumulated.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 the month, sunrise is at 6:44 am and sunset at 8:01 pm. On the last day of September, sunrise is at 7:21 am and sunset at 7:04 pm CDT.
Sunshine
In September, the average sunshine is 8.9h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: In September, the maximum UV index of 4 suggests this advice:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Underwood, MN
- Average high temperature in September: 70.7°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (16.3°F).
- Average low temperature in September: 51.6°F
The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (3.7°F).
Average pressure in September
Underwood, MN
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Underwood, MN
- Average wind speed in September: 9.3mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (8mph).
Average humidity in September
Underwood, MN
- Average humidity in September: 67%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is May (66%).
Average rainfall in September
Underwood, MN
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is June (3.43").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in September
Underwood, MN
- Average rainfall days in September: 10.6 days
The month with the highest number of rainy days is June (17.3 days).
The month with the least rainy days is February (2.1 days).
Average snowfall in September
Underwood, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (5.04").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Underwood, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (15.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Underwood, MN
- Average daylight in September: 12h and 30min
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 54min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in September
Underwood, MN
- Average sunshine days in September: 17.1 days
The month with the most sunshine days is September (17.1 days).
The month with the least sunshine days is June (9.3 days).
Average UV index in September
Underwood, 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
Underwood, MN
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 69).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility in September
Underwood, MN
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
