Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The transition to September results in a modest reduction in average high-temperature, moving from a moderately hot 80.6°F (27°C) in August to a pleasant 73°F (22.8°C). Throughout September, Nassau encounters an average temperature drop to a cool 52.7°F (11.5°C).Humidity
In September, the average relative humidity is 68%.Rainfall
In Nassau, in September, it is raining for 8.5 days, with typically 1.57" (40mm) of accumulated precipitation. Throughout the year, there are 99.9 rainfall days, and 19.65" (499mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 31min.On the first day of the month, sunrise is at 6:48 am and sunset at 8:02 pm. On the last day of September, sunrise is at 7:23 am and sunset at 7:07 pm CDT.
Sunshine
The average sunshine in September is 9h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: The daily maximum UV index of 4 in September interprets into the following advice:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. To guard against the harmful effects of the Sun, minimize exposure during midday. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Nassau have in September?
How high is the UV index in September in Nassau?
Average temperature in September
Nassau, MN
- Average high temperature in September: 73°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (20.3°F).
- Average low temperature in September: 52.7°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 (6.3°F).
Average pressure in September
Nassau, MN
- Average pressure in September: 29.98"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Nassau, MN
- Average wind speed in September: 8.9mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).
Average humidity in September
Nassau, MN
- Average humidity in September: 68%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (66%).
Average rainfall in September
Nassau, MN
- Average rainfall in September: 1.57"
The wettest month (with the highest rainfall) is July (3.35").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in September
Nassau, MN
- Average rainfall days in September: 8.5 days
The month with the highest number of rainy days is June (15.9 days).
The month with the least rainy days is February (1.3 days).
Average snowfall in September
Nassau, MN
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.53").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Nassau, MN
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and December (10.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Nassau, MN
- Average daylight in September: 12h and 3min
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: 9h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in September
Nassau, MN
- Average sunshine days in September: 19.4 days
The month with the most sunshine days is November (21.4 days).
The month with the least sunshine days is June (12.6 days).
Average UV index in September
Nassau, 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 and November (UV index 1).
Average cloud cover in September
Nassau, MN
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in September
Nassau, MN
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Nassau, Minnesota, USA
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