September weather forecastCoalwood, MT
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Coalwood, Montana, with an average temperature ranging between max 74.3°F (23.5°C) and min 56.3°F (13.5°C).Temperature
With the onset of September, Coalwood experiences a modest temperature adjustment, with the average high-temperature receding from a moderately hot 84.7°F (29.3°C) in August to a still warm 74.3°F (23.5°C). September brings with it a nighttime average temperature of 56.3°F (13.5°C).Humidity
The average relative humidity in September in Coalwood is 43%.Rainfall
In September, the rain falls for 6.7 days. Throughout September, 0.51" (13mm) of precipitation is accumulated. In Coalwood, during the entire year, the rain falls for 83.1 days and collects up to 6.81" (173mm) of precipitation.Snowfall
In Coalwood, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 31min.On the first day of the month, sunrise is at 6:24 am and sunset at 7:39 pm. On the last day of September, sunrise is at 7:00 am and sunset at 6:43 pm MDT.
Sunshine
In September, the average sunshine is 10.5h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum UV index of 4 in September translates into the following recommendations:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. On your guard! Snow's reflection can almost 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
Coalwood, MT
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in September: 56.3°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).
Average pressure in September
Coalwood, MT
- Average pressure in September: 29.92"Hg
The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in September
Coalwood, MT
- Average wind speed in September: 9.8mph
The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest months (with the lowest average wind speed) are February and August (9.3mph).
Average humidity in September
Coalwood, MT
- Average humidity in September: 43%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is August (39%).
Average rainfall in September
Coalwood, MT
- Average rainfall in September: 0.51"
The wettest month (with the highest rainfall) is May (1.1").
The driest months (with the least rainfall) are November and December (0.28").
Average rainfall days in September
Coalwood, MT
- Average rainfall days in September: 6.7 days
The month with the highest number of rainy days is May (11.3 days).
The month with the least rainy days is December (2.6 days).
Average snowfall in September
Coalwood, MT
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Coalwood, MT
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (10.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Coalwood, 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 30min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 6min).
Average sunshine days in September
Coalwood, MT
- Average sunshine days in September: 21.5 days
The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is April (16.5 days).
Average UV index in September
Coalwood, 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
Coalwood, MT
- Average cloud cover in September: 21
The months with the most cloud cover are February and December (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 15).
Average visibility in September
Coalwood, 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).
