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
In September, the meteorological conditions change slightly, with the average high-temperature moving from a warm 77°F (25°C) in August to an agreeable 68.7°F (20.4°C). Bridger records an average temperature drop to a frosty 48°F (8.9°C) in September.Humidity
In September, the average relative humidity is 47%.Rainfall
In Bridger, in September, during 9.3 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. Throughout the year, in Bridger, there are 138.8 rainfall days, and 16.14" (410mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 1.5 snowfall days, it receives 1.54" (39mm) of snow. Throughout the year, in Bridger, there are 92.3 snowfall days, and 55.83" (1418mm) of snow is accumulated.Daylight
In Bridger, the average length of the day in September is 12h and 31min.On the first day of September, sunrise is at 6:38 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 6:57 pm MDT.
Sunshine
In September, the average sunshine is 10.7h.UV index
In Bridger, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: A daily high UV index of 4 in September leads to these guidelines:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. To protect against the Sun's most potent rays, avoid direct exposure around midday. During bright days, sunglasses that offer UVA and UVB defense are recommended. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of 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 to snow?
What is the average length of the day in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Bridger, MT
- Average high temperature in September: 68.7°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is December (27.5°F).
- Average low temperature in September: 48°F
The month with the highest average low temperature is July (56.1°F).
The coldest months (with the lowest average low temperature) are February and December (14.9°F).
Average pressure in September
Bridger, MT
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Bridger, MT
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is January (7.9mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in September
Bridger, MT
- Average humidity in September: 47%
The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is August (43%).
Average rainfall in September
Bridger, MT
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is May (2.52").
The driest month (with the least rainfall) is December (0.55").
Average rainfall days in September
Bridger, MT
- Average rainfall days in September: 9.3 days
The month with the highest number of rainy days is May (20 days).
The month with the least rainy days is November (5.7 days).
Average snowfall in September
Bridger, MT
- Average snowfall in September: 1.54"
The month with the highest snowfall is April (9.37").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Bridger, MT
- Average snowfall days in September: 1.5 days
The month with the highest number of snowfall days is February (14.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Bridger, MT
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 10h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 30min).
Average sunshine days in September
Bridger, MT
- Average sunshine days in September: 14.9 days
The month with the most sunshine days is December (17.4 days).
The month with the least sunshine days is May (5.1 days).
Average UV index in September
Bridger, MT
- 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, March, April, October, November and December (UV index 2).
Average cloud cover in September
Bridger, MT
- Average cloud cover in September: 17
The month with the most cloud cover is February (Cloud cover 36).
The months with the least cloud cover are July and August (Cloud cover 16).
Average visibility in September
Bridger, 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).
Bridger, Montana, USA
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