September weather forecastKnife River, MN
September
Weather in September
September, the first month of the autumn in Knife River, is still a comfortable month, with an average temperature fluctuating between 64.4°F (18°C) and 50.4°F (10.2°C).Temperature
Knife River's weather in September involves a mild decrease in the average high-temperature, moving down slightly from August's pleasant 72.3°F (22.4°C) to a comfortable 64.4°F (18°C). In Knife River, an average low-temperature of 50.4°F (10.2°C) is recorded during September nights.Humidity
The average relative humidity in September is 79%.Rainfall
In Knife River, Minnesota, in September, it is raining for 12.2 days, with typically 1.77" (45mm) of accumulated precipitation. Throughout the year, in Knife River, Minnesota, there are 115 rainfall days, and 21.5" (546mm) of precipitation is accumulated.Snowfall
In Knife River, snow does not fall in June through September.Daylight
In Knife River, the average length of the day in September is 12h and 32min.On the first day of September in Knife River, Minnesota, sunrise is at 6:27 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:48 pm CDT.
Sunshine
In Knife River, Minnesota, the average sunshine in September is 8.6h.UV index
The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 3 in September interprets into the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Knife River, MN
- Average high temperature in September: 64.4°F
The warmest month (with the highest average high temperature) is August (72.3°F).
The month with the lowest average high temperature is January (17.6°F).
- Average low temperature in September: 50.4°F
The month with the highest average low temperature is July (56.7°F).
The coldest month (with the lowest average low temperature) is January (6.3°F).
Average pressure in September
Knife River, MN
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is February (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Knife River, MN
- Average wind speed in September: 8.2mph
The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).
Average humidity in September
Knife River, MN
- Average humidity in September: 79%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is May (75%).
Average rainfall in September
Knife River, MN
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is July (2.87").
The driest month (with the least rainfall) is January (0.83").
Average rainfall days in September
Knife River, MN
- Average rainfall days in September: 12.2 days
The month with the highest number of rainy days is June (14.7 days).
The month with the least rainy days is February (1.9 days).
Average snowfall in September
Knife River, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (6.1").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Knife River, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (18.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Knife River, MN
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 8h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in September
Knife River, MN
- Average sunshine days in September: 14.9 days
The month with the most sunshine days is October (15.7 days).
The month with the least sunshine days is February (12.6 days).
Average UV index in September
Knife River, MN
- Average UV index in September: 3
The months with the highest UV index are July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in September
Knife River, MN
- Average cloud cover in September: 38
The month with the most cloud cover is January (Cloud cover 69).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility in September
Knife River, MN
- Average visibility in September: 6mi
The months with the highest visibility are February, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, March and December (5mi).
