September weather forecastShonkin, MT
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Shonkin, Montana, with an average temperature fluctuating between 70.7°F (21.5°C) and 52.2°F (11.2°C).Temperature
The commencement of September indicates a shift in the average high-temperature, receding from August's moderately hot 81.9°F (27.7°C) to an agreeable 70.7°F (21.5°C). An average low-temperature of 52.2°F (11.2°C) marks the nights throughout September.Humidity
In September, the average relative humidity is 46%.Rainfall
In September, the rain falls for 9.4 days. Throughout September, 1.14" (29mm) of precipitation is accumulated. Throughout the year, in Shonkin, Montana, there are 119.1 rainfall days, and 13.43" (341mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.4 snowfall days, it receives 0.94" (24mm) of snow. In Shonkin, during the entire year, snow falls for 58.3 days and aggregates up to 29.37" (746mm) of snow.Daylight
The average length of the day in September is 12h and 33min.On the first day of the month, sunrise is at 6:41 am and sunset at 8:02 pm. On the last day of September, sunrise is at 7:21 am and sunset at 7:02 pm MDT.
Sunshine
The average sunshine in September is 9.9h.UV index
In Shonkin, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. The solar radiation around mid-day is intense; avoid the Sun and stay safe. To cut down UV radiation exposure by about half, sport a wide-brim hat. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Shonkin, MT
- Average high temperature in September: 70.7°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is December (29.8°F).
- Average low temperature in September: 52.2°F
The month with the highest average low temperature is August (60.4°F).
The coldest month (with the lowest average low temperature) is February (18.1°F).
Average pressure in September
Shonkin, MT
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Shonkin, MT
- Average wind speed in September: 8.9mph
The windiest months (with the highest average wind speed) are January and November (10.7mph).
The calmest month (with the lowest average wind speed) is August (8.1mph).
Average humidity in September
Shonkin, MT
- Average humidity in September: 46%
The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is August (39%).
Average rainfall in September
Shonkin, MT
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is June (2.05").
The driest month (with the least rainfall) is December (0.67").
Average rainfall days in September
Shonkin, MT
- Average rainfall days in September: 9.4 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is January (5.3 days).
Average snowfall in September
Shonkin, MT
- Average snowfall in September: 0.94"
The month with the highest snowfall is February (5.51").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Shonkin, MT
- Average snowfall days in September: 0.4 days
The month with the highest number of snowfall days is February (12.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Shonkin, MT
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 9h and 54min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 30min).
Average sunshine days in September
Shonkin, MT
- Average sunshine days in September: 19.3 days
The month with the most sunshine days is September (19.3 days).
The month with the least sunshine days is April (11.2 days).
Average UV index in September
Shonkin, 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, November and December (UV index 2).
Average cloud cover in September
Shonkin, 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 14).
Average visibility in September
Shonkin, 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).
