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
September brings a decrease in the average high-temperature, falling from August's moderately hot 77°F (25°C) to a comfortable 67.6°F (19.8°C). The nighttime temperature dips to a chilly 48.4°F (9.1°C) on average during September.Humidity
In September, the average relative humidity is 74%.Rainfall
In Boy River, during September, the rain falls for 11.4 days and regularly aggregates up to 1.57" (40mm) of precipitation. Throughout the year, there are 106.8 rainfall days, and 19.53" (496mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 32min.On the first day of the month, sunrise is at 6:36 am and sunset at 7:55 pm. On the last day of September, sunrise is at 7:15 am and sunset at 6:57 pm CDT.
Sunshine
In September, the average sunshine is 8.2h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The daily maximum UV index of 4 in September interprets into the following advice:
Undertake protective steps - Preventing sun damage is advised. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
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 much 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 reading in September?
Average temperature in September
Boy River, MN
- Average high temperature in September: 67.6°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (16.5°F).
- Average low temperature in September: 48.4°F
The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is January (2.3°F).
Average pressure in September
Boy River, MN
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Boy River, MN
- Average wind speed in September: 7.4mph
The windiest months (with the highest average wind speed) are April and October (7.6mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in September
Boy River, MN
- Average humidity in September: 74%
The months with the highest relative humidity are January and February (93%).
The month with the lowest relative humidity is May (70%).
Average rainfall in September
Boy River, MN
- Average rainfall in September: 1.57"
The wettest month (with the highest rainfall) is June (2.87").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days in September
Boy River, MN
- Average rainfall days in September: 11.4 days
The month with the highest number of rainy days is June (15.2 days).
The month with the least rainy days is February (1.8 days).
Average snowfall in September
Boy River, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (8.03").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Boy River, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (17.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Boy River, 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 36min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 0min).
Average sunshine days in September
Boy River, MN
- Average sunshine days in September: 16.8 days
The month with the most sunshine days is August (17.8 days).
The month with the least sunshine days is March (12.2 days).
Average UV index in September
Boy River, 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, November and December (UV index 1).
Average cloud cover in September
Boy River, MN
- Average cloud cover in September: 40
The month with the most cloud cover is January (Cloud cover 79).
The months with the least cloud cover are July and August (Cloud cover 35).
Average visibility in September
Boy River, MN
- Average visibility in September: 6mi
The months with the highest visibility are May, June, September and October (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
Boy River, Minnesota, USA
Weather forecast for your location
2. Allow the app to use your location