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 involves a temperature shift, with the average high-temperature dropping from a warm 77.5°F (25.3°C) in August to a pleasant 68.2°F (20.1°C). Mahnomen sees an average low-temperature of 49.1°F (9.5°C) during September.Humidity
In Mahnomen, the average relative humidity in September is 70%.Rainfall
In Mahnomen, in September, during 10.7 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. In Mahnomen, during the entire year, the rain falls for 110.6 days and collects up to 19.45" (494mm) of precipitation.Snowfall
In Mahnomen, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 33min.On the first day of the month, sunrise is at 6:43 am and sunset at 8:03 pm. On the last day of September, sunrise is at 7:22 am and sunset at 7:04 pm CDT.
Sunshine
In Mahnomen, the average sunshine in September is 8.4h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index of 4 during September leads to these instructions:
Ensure safety - Imperative it is to shield skin and eyes from damage. Around midday, solar radiation is most harmful; hence, exposure should be limited. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's 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?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Mahnomen, MN
- Average high temperature in September: 68.2°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (14.7°F).
- Average low temperature in September: 49.1°F
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (0.5°F).
Average pressure in September
Mahnomen, MN
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is February (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Mahnomen, MN
- Average wind speed in September: 8.8mph
The windiest month (with the highest average wind speed) is October (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (7.5mph).
Average humidity in September
Mahnomen, MN
- Average humidity in September: 70%
The months with the highest relative humidity are January and February (93%).
The month with the lowest relative humidity is May (68%).
Average rainfall in September
Mahnomen, MN
- Average rainfall in September: 1.46"
The wettest month (with the highest rainfall) is June (3.27").
The driest month (with the least rainfall) is February (0.79").
Average rainfall days in September
Mahnomen, MN
- Average rainfall days in September: 10.7 days
The month with the highest number of rainy days is June (17.2 days).
The month with the least rainy days is February (2 days).
Average snowfall in September
Mahnomen, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (6.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Mahnomen, MN
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is January (20.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Mahnomen, MN
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 2h and 12min).
Average sunshine days in September
Mahnomen, MN
- Average sunshine days in September: 17.7 days
The month with the most sunshine days is August (17.8 days).
The month with the least sunshine days is June (9.8 days).
Average UV index in September
Mahnomen, MN
- 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, February, October, November and December (UV index 1).
Average cloud cover in September
Mahnomen, MN
- Average cloud cover in September: 35
The months with the most cloud cover are January and February (Cloud cover 77).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Mahnomen, MN
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
Mahnomen, Minnesota, USA
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