September weather forecastSomers, MT
September
Weather in September
The first month of the autumn, September, is also an enjoyable month in Somers, Montana, with temperature in the range of an average low of 41.9°F (5.5°C) and an average high of 66.2°F (19°C).Temperature
Welcoming September, Somers observes a shift in the average high-temperature, falling from August's moderately hot 76.5°F (24.7°C) to a refreshing 66.2°F (19°C). In September, the temperature sees a substantial plunge from daytime highs to a low average of 41.9°F (5.5°C).Humidity
In September, the average relative humidity is 61%.Rainfall
In September, the rain falls for 10.5 days. Throughout September, 1.1" (28mm) of precipitation is accumulated. Throughout the year, there are 153.5 rainfall days, and 19.76" (502mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.31" (8mm) of snow. In Somers, during the entire year, snow falls for 94.5 days and aggregates up to 52.6" (1336mm) of snow.Daylight
In September, the average length of the day is 12h and 34min.On the first day of the month, sunrise is at 6:56 am and sunset at 8:17 pm. On the last day of September, in Somers, sunrise is at 7:35 am and sunset at 7:17 pm MDT.
Sunshine
The average sunshine in September is 9.3h.UV index
In Somers, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, the maximum UV index of 3 translates into these guidelines:
Guard yourself - Avoiding sunburn is suggested. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Somers, 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
Somers, 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
Somers, 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
Somers, 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
Somers, 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
Somers, 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
Somers, 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
Somers, 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
Somers, 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
Somers, 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
Somers, 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
Somers, 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
Somers, 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).
