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
During the transition into September, Donnybrook observes a decrease in the average high-temperature, falling from a moderately hot 81.5°F (27.5°C) in August to a pleasant 70.3°F (21.3°C). Throughout September, Donnybrook witnesses a nighttime temperature average of 50.9°F (10.5°C).Humidity
In September, the average relative humidity is 56%.Rainfall
In September, the rain falls for 10.3 days. Throughout September, 1.89" (48mm) of precipitation is accumulated. Throughout the year, in Donnybrook, there are 104.5 rainfall days, and 16.1" (409mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In Donnybrook, the average length of the day in September is 12h and 34min.On the first day of the month, sunrise is at 7:06 am and sunset at 8:28 pm. On the last day of September, sunrise is at 7:46 am and sunset at 7:27 pm CDT.
Sunshine
The average sunshine in September is 8.5h.UV index
In Donnybrook, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the average person.Note: The daily high UV index of 4 during September translates into the following recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Donnybrook in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Donnybrook have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Donnybrook have in September?
How high is the UV index in September?
Average temperature in September
Donnybrook, ND
- Average high temperature in September: 70.3°F
The warmest month (with the highest average high temperature) is August (81.5°F).
The month with the lowest average high temperature is January (18.1°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is January (4.3°F).
Average pressure in September
Donnybrook, ND
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is February (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Donnybrook, ND
- Average wind speed in September: 9.6mph
The windiest month (with the highest average wind speed) is October (10.7mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).
Average humidity in September
Donnybrook, ND
- Average humidity in September: 56%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (54%).
Average rainfall in September
Donnybrook, ND
- Average rainfall in September: 1.89"
The wettest month (with the highest rainfall) is June (2.83").
The driest months (with the least rainfall) are January and February (0.51").
Average rainfall days in September
Donnybrook, ND
- Average rainfall days in September: 10.3 days
The month with the highest number of rainy days is June (15.8 days).
The month with the least rainy days is February (2 days).
Average snowfall in September
Donnybrook, ND
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.82").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Donnybrook, ND
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Donnybrook, ND
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 18min).
The months with the least sunshine are January and December (Average sunshine: 3h and 48min).
Average sunshine days in September
Donnybrook, ND
- Average sunshine days in September: 17.8 days
The month with the most sunshine days is October (18.2 days).
The month with the least sunshine days is June (10.7 days).
Average UV index in September
Donnybrook, ND
- 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 and November (UV index 1).
Average cloud cover in September
Donnybrook, ND
- Average cloud cover in September: 27
The month with the most cloud cover is February (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in September
Donnybrook, ND
- 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).
Donnybrook, North Dakota, USA
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