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 commencement of September includes a gentle temperature shift, with the average high-temperature dropping a bit from a moderately hot 79.7°F (26.5°C) in August to a pleasant 72°F (22.2°C). In September, the recorded average low-temperature is a cool 52°F (11.1°C).Humidity
In September, the average relative humidity is 68%.Rainfall
In Donnelly, in September, it is raining for 8.5 days, with typically 1.42" (36mm) of accumulated precipitation. Throughout the year, in Donnelly, there are 105.3 rainfall days, and 19.29" (490mm) of precipitation is accumulated.Snowfall
In Donnelly, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 31min.On the first day of the month, sunrise is at 6:46 am and sunset at 8:01 pm. On the last day of September, in Donnelly, sunrise is at 7:22 am and sunset at 7:05 pm CDT.
Sunshine
In Donnelly, the average sunshine in September is 8.8h.UV index
In September, the average daily maximum UV index in Donnelly is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 4 suggests this advice:
Take measures. Individuals with light skin might experience burns in under 30 minutes. Avoiding the Sun during its peak radiation time around midday is a healthy practice. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Donnelly in September?
What is the average humidity in September in Donnelly?
How many days does it rain in September in Donnelly?
When it does not snow in Donnelly?
Does it snow in Donnelly in September?
How many hours of daylight does Donnelly have in September?
When is the sunrise / sunset in September in Donnelly?
How long on average sun shines in September in Donnelly?
How high is the UV index in September in Donnelly?
Average temperature in September
Donnelly, MN
- Average high temperature in September: 72°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°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 (4.5°F).
Average pressure in September
Donnelly, 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
Donnelly, MN
- Average wind speed in September: 9.3mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).
Average humidity in September
Donnelly, MN
- Average humidity in September: 68%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are April and May (67%).
Average rainfall in September
Donnelly, MN
- Average rainfall in September: 1.42"
The wettest months (with the highest rainfall) are June and July (3.15").
The driest months (with the least rainfall) are January and February (0.55").
Average rainfall days in September
Donnelly, MN
- Average rainfall days in September: 8.5 days
The month with the highest number of rainy days is June (15.7 days).
The month with the least rainy days is February (1.9 days).
Average snowfall in September
Donnelly, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Donnelly, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Donnelly, 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: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in September
Donnelly, MN
- Average sunshine days in September: 19.5 days
The month with the most sunshine days is September (19.5 days).
The month with the least sunshine days is June (12.1 days).
Average UV index in September
Donnelly, 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, November and December (UV index 1).
Average cloud cover in September
Donnelly, MN
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 29).
Average visibility in September
Donnelly, 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).
Donnelly, Minnesota, USA
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