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
As August transitions to September, the average high-temperature falls from a moderately hot 80.4°F (26.9°C) to an agreeable 70.5°F (21.4°C). Forest River observes an average low-temperature of 51.6°F (10.9°C) during September.Humidity
The average relative humidity in September is 61%.Rainfall
In Forest River, in September, it is raining for 8.7 days, with typically 1.81" (46mm) of accumulated precipitation. Throughout the year, there are 97.8 rainfall days, and 15.83" (402mm) of precipitation is accumulated.Snowfall
In Forest River, North Dakota, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 34min.On the first day of September, sunrise is at 6:48 am and sunset at 8:10 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 7:10 pm CDT.
Sunshine
In September, the average sunshine is 8.7h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: The UV index of 4 during September leads to these advisories:
Put precautions into practice - Guidance to elude sunburn is provided. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow in Forest River?
Does it snow in September?
How many hours of daylight does Forest River have in September?
When is the sunrise / sunset in September in Forest River?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Forest River, ND
- Average high temperature in September: 70.5°F
The warmest month (with the highest average high temperature) is August (80.4°F).
The month with the lowest average high temperature is January (14.7°F).
- Average low temperature in September: 51.6°F
The month with the highest average low temperature is July (59.9°F).
The coldest month (with the lowest average low temperature) is January (0.9°F).
Average pressure in September
Forest River, ND
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Forest River, ND
- Average wind speed in September: 9.8mph
The windiest month (with the highest average wind speed) is October (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (8.1mph).
Average humidity in September
Forest River, ND
- Average humidity in September: 61%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is August (59%).
Average rainfall in September
Forest River, ND
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is June (2.8").
The driest months (with the least rainfall) are January and February (0.55").
Average rainfall days in September
Forest River, ND
- Average rainfall days in September: 8.7 days
The month with the highest number of rainy days is June (15.9 days).
The month with the least rainy days is February (1.6 days).
Average snowfall in September
Forest River, ND
- Average snowfall in September: 0"
The month with the highest snowfall is December (3.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Forest River, 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
Forest River, ND
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in September
Forest River, ND
- Average sunshine days in September: 19.5 days
The month with the most sunshine days is August (19.8 days).
The month with the least sunshine days is June (11.5 days).
Average UV index in September
Forest River, 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, February and November (UV index 1).
Average cloud cover in September
Forest River, ND
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in September
Forest River, 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).
Forest River, North Dakota, USA
Weather forecast for your location
2. Allow the app to use your location