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 arrival of September correlates with a minor temperature reduction, down from August's warm 79.3°F (26.3°C) to a pleasant 71.8°F (22.1°C). An average temperature of 52°F (11.1°C) is recorded during the nights in September.Humidity
The average relative humidity in September in De Graff is 70%.Rainfall
In De Graff, during September, the rain falls for 10.1 days and regularly aggregates up to 1.69" (43mm) of precipitation. Throughout the year, there are 109.8 rainfall days, and 20.47" (520mm) 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 6:44 am and sunset at 7:58 pm. On the last day of September, in De Graff, sunrise is at 7:19 am and sunset at 7:03 pm CDT.
Sunshine
The average sunshine in September in De Graff is 9h.UV index
In September, the average daily maximum UV index in De Graff is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: An average UV index of 4 in September transforms into this advice:
Act with care - The need to guard against sun damage is communicated. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in De Graff?
What is the average humidity in September in De Graff?
How many days does it rain in September in De Graff?
When it does not snow in De Graff?
Does it snow in De Graff in September?
What is the average length of the day in September in De Graff?
When is the sunrise / sunset in September in De Graff?
How long on average sun shines in September in De Graff?
How high is the UV index in September in De Graff?
Average temperature in September
De Graff, MN
- Average high temperature in September: 71.8°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 (18.7°F).
- Average low temperature in September: 52°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (4.6°F).
Average pressure in September
De Graff, 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 (29.87"Hg).
Average wind speed in September
De Graff, MN
- Average wind speed in September: 8.9mph
The windiest month (with the highest average wind speed) is April (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (7.6mph).
Average humidity in September
De Graff, MN
- Average humidity in September: 70%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is May (67%).
Average rainfall in September
De Graff, MN
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is July (3.43").
The driest months (with the least rainfall) are January and February (0.55").
Average rainfall days in September
De Graff, MN
- Average rainfall days in September: 10.1 days
The month with the highest number of rainy days is June (16.3 days).
The month with the least rainy days is January (2 days).
Average snowfall in September
De Graff, 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
De Graff, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
De Graff, 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 18min).
Average sunshine days in September
De Graff, MN
- Average sunshine days in September: 17.7 days
The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is June (10.7 days).
Average UV index in September
De Graff, 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 and December (UV index 1).
Average cloud cover in September
De Graff, MN
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility in September
De Graff, MN
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
De Graff, Minnesota, USA
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