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
September signals a slight drop in average high-temperature, sliding from August's warm 78.4°F (25.8°C) to an agreeable 72.9°F (22.7°C). Delavan experiences a nighttime temperature average of 54°F (12.2°C) during September.Humidity
In September, the average relative humidity is 75%.Rainfall
In Delavan, in September, it is raining for 11 days, with typically 1.81" (46mm) of accumulated precipitation. Throughout the year, in Delavan, there are 111.2 rainfall days, and 18.35" (466mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:40 am and sunset at 7:51 pm. On the last day of September, sunrise is at 7:13 am and sunset at 6:58 pm CDT.
Sunshine
In September, the average sunshine is 9h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Exercise prevention - Warding off sunburn is urged. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in Delavan in September?
How many hours of daylight does Delavan have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Delavan, MN
- Average high temperature in September: 72.9°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 (21.6°F).
- Average low temperature in September: 54°F
The month with the highest average low temperature is July (62.8°F).
The coldest month (with the lowest average low temperature) is January (9°F).
Average pressure in September
Delavan, MN
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Delavan, MN
- Average wind speed in September: 8.6mph
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 (7.4mph).
Average humidity in September
Delavan, MN
- Average humidity in September: 75%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (69%).
Average rainfall in September
Delavan, MN
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is June (3.15").
The driest month (with the least rainfall) is January (0.63").
Average rainfall days in September
Delavan, MN
- Average rainfall days in September: 11 days
The month with the highest number of rainy days is June (16.7 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in September
Delavan, MN
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.06").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Delavan, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (11.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Delavan, MN
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 9h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in September
Delavan, MN
- Average sunshine days in September: 17.3 days
The month with the most sunshine days is November (20.7 days).
The month with the least sunshine days is June (10.5 days).
Average UV index in September
Delavan, 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 February and November (UV index 1).
Average cloud cover in September
Delavan, MN
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Delavan, 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).
Delavan, Minnesota, USA
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