September weather forecastShepherd, MT
September
Weather in September
September, the first month of the autumn in Shepherd, is still a pleasant month, with temperature in the range of an average high of 73.2°F (22.9°C) and an average low of 52.5°F (11.4°C).Temperature
September's arrival corresponds with a decrease in average high-temperatures, from August's warm 83.5°F (28.6°C) to a pleasant 73.2°F (22.9°C). Throughout the month of September, the average temperature in Shepherd dips to a cool 52.5°F (11.4°C) at night.Humidity
The average relative humidity in September in Shepherd is 44%.Rainfall
In Shepherd, Montana, in September, during 6.8 rainfall days, 0.67" (17mm) of precipitation is typically accumulated. Throughout the year, in Shepherd, there are 120.5 rainfall days, and 13.54" (344mm) of precipitation is accumulated.Snowfall
Months with snowfall in Shepherd 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 0.12" (3mm) of snow. In Shepherd, during the entire year, snow falls for 68.6 days and aggregates up to 32.56" (827mm) of snow.Daylight
The average length of the day in September in Shepherd is 12h and 31min.On the first day of the month, sunrise is at 6:35 am and sunset at 7:50 pm. On the last day of September, sunrise is at 7:11 am and sunset at 6:54 pm MDT.
Sunshine
The average sunshine in September is 10.3h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, the UV index of 4 transforms into the following advice:
Ensure safety - Imperative it is to shield skin and eyes from damage. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Shepherd, MT
- Average high temperature in September: 73.2°F
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is December (31.1°F).
- Average low temperature in September: 52.5°F
The months with the highest average low temperature are July and August (60.6°F).
The coldest month (with the lowest average low temperature) is February (18.3°F).
Average pressure in September
Shepherd, MT
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Shepherd, MT
- Average wind speed in September: 8.1mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in September
Shepherd, MT
- Average humidity in September: 44%
The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is August (40%).
Average rainfall in September
Shepherd, MT
- Average rainfall in September: 0.67"
The wettest month (with the highest rainfall) is May (2.24").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in September
Shepherd, MT
- Average rainfall days in September: 6.8 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (5.6 days).
Average snowfall in September
Shepherd, MT
- Average snowfall in September: 0.12"
The month with the highest snowfall is February (6.61").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Shepherd, MT
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is February (14.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Shepherd, MT
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 10h and 18min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 18min).
Average sunshine days in September
Shepherd, MT
- Average sunshine days in September: 21.1 days
The month with the most sunshine days is September (21.1 days).
The month with the least sunshine days is April (9.8 days).
Average UV index in September
Shepherd, MT
- Average UV index in September: 4
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Shepherd, MT
- Average cloud cover in September: 20
The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 14).
Average visibility in September
Shepherd, 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).
