September weather forecastBigfork, MT
September
Weather in September
The first month of the autumn, September, is still a comfortable month in Bigfork, Montana, with an average temperature varying between 41.9°F (5.5°C) and 66.2°F (19°C).Temperature
September involves a decrease in temperature, down from a moderately hot 76.5°F (24.7°C) in August to a refreshing 66.2°F (19°C). A noteworthy temperature dip to an icy 41.9°F (5.5°C) is observed during the nights of September in Bigfork.Humidity
The average relative humidity in September is 61%.Rainfall
In September, the rain falls for 10.5 days. Throughout September, 1.1" (28mm) of precipitation is accumulated. Throughout the year, in Bigfork, there are 153.5 rainfall days, and 19.76" (502mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows in Bigfork. Throughout September, in the average 0.2 snowfall days, it receives 0.31" (8mm) of snow. Throughout the year, there are 94.5 snowfall days, and 52.6" (1336mm) of snow is accumulated.Daylight
In Bigfork, the average length of the day in September is 12h and 34min.On the first day of the month, sunrise is at 6:55 am and sunset at 8:16 pm. On the last day of September, sunrise is at 7:35 am and sunset at 7:16 pm MDT.
Sunshine
In September, the average sunshine in Bigfork is 9.3h.UV index
In Bigfork, Montana, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 3 during September translates into the following directions:
Exercise prevention - Protecting skin and eyes from harm is required. It's recommended to limit sun exposure when its radiation is at its peak during midday. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Bigfork, MT
- Average high temperature in September: 66.2°F
The warmest month (with the highest average high temperature) is July (76.6°F).
The month with the lowest average high temperature is December (27.5°F).
- Average low temperature in September: 41.9°F
The month with the highest average low temperature is July (48.7°F).
The coldest month (with the lowest average low temperature) is December (16.7°F).
Average pressure in September
Bigfork, MT
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Bigfork, MT
- Average wind speed in September: 4mph
The windiest month (with the highest average wind speed) is April (4.9mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in September
Bigfork, MT
- Average humidity in September: 61%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is August (53%).
Average rainfall in September
Bigfork, MT
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is June (2.36").
The driest months (with the least rainfall) are July and August (0.63").
Average rainfall days in September
Bigfork, MT
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is April (18.8 days).
The month with the least rainy days is August (7.2 days).
Average snowfall in September
Bigfork, MT
- Average snowfall in September: 0.31"
The month with the highest snowfall is December (12.32").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Bigfork, MT
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (20.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Bigfork, MT
- Average daylight in September: 12h and 36min
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: 9h and 18min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Bigfork, MT
- Average sunshine days in September: 17.4 days
The month with the most sunshine days is July (20.2 days).
The months with the least sunshine days are February and March (7.8 days).
Average UV index in September
Bigfork, MT
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Bigfork, MT
- Average cloud cover in September: 23
The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility in September
Bigfork, MT
- 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).
