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 decrease of average high-temperatures is mild in September, with a decline from a moderately hot 81.1°F (27.3°C) in August to an agreeable 70°F (21.1°C). Fort Belknap Agency usually reports an average low-temperature of 52°F (11.1°C) during the month of September.Humidity
The average relative humidity in September is 47%.Rainfall
In Fort Belknap Agency, during September, the rain falls for 7.1 days and regularly aggregates up to 0.79" (20mm) of precipitation. In Fort Belknap Agency, during the entire year, the rain falls for 99.1 days and collects up to 10.12" (257mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.3 snowfall days, it receives 0.71" (18mm) of snow. Throughout the year, there are 57.6 snowfall days, and 21.69" (551mm) of snow is accumulated.Daylight
In Fort Belknap Agency, the average length of the day in September is 12h and 34min.On the first day of the month, sunrise is at 6:33 am and sunset at 7:56 pm. On the last day of September, sunrise is at 7:14 am and sunset at 6:55 pm MDT.
Sunshine
In September, the average sunshine is 10.2h.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 unsafe exposure to UV radiation for the ordinary person.Note: A typical high UV index of 4 in September suggests the following recommendations:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How many days does it rain in September?
When does it start snowing?
How many hours of daylight does Fort Belknap Agency have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Fort Belknap Agency have in September?
What is the UV index intensity in September?
Average temperature in September
Fort Belknap Agency, MT
- Average high temperature in September: 70°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is February (26.2°F).
- Average low temperature in September: 52°F
The month with the highest average low temperature is August (60.3°F).
The coldest month (with the lowest average low temperature) is February (12.6°F).
Average pressure in September
Fort Belknap Agency, MT
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in September
Fort Belknap Agency, MT
- Average wind speed in September: 9.1mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (8.7mph).
Average humidity in September
Fort Belknap Agency, MT
- Average humidity in September: 47%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is August (42%).
Average rainfall in September
Fort Belknap Agency, MT
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is June (1.85").
The driest months (with the least rainfall) are February, March and December (0.55").
Average rainfall days in September
Fort Belknap Agency, MT
- Average rainfall days in September: 7.1 days
The month with the highest number of rainy days is May (13.2 days).
The month with the least rainy days is February (4.6 days).
Average snowfall in September
Fort Belknap Agency, MT
- Average snowfall in September: 0.71"
The month with the highest snowfall is January (4.02").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Fort Belknap Agency, MT
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is January (12.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Fort Belknap Agency, MT
- 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: 10h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).
Average sunshine days in September
Fort Belknap Agency, MT
- Average sunshine days in September: 21 days
The month with the most sunshine days is July (21.6 days).
The month with the least sunshine days is April (12.5 days).
Average UV index in September
Fort Belknap Agency, MT
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Fort Belknap Agency, MT
- Average cloud cover in September: 23
The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 15).
Average visibility in September
Fort Belknap Agency, MT
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Fort Belknap Agency, Montana, USA
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