September weather forecastMarsh, MT
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Marsh, Montana, with an average temperature ranging between min 54.7°F (12.6°C) and max 73.2°F (22.9°C).Temperature
Setting in of September comes with a decrease in the average high-temperature, moving from a moderately hot 83.7°F (28.7°C) in August to a pleasant 73.2°F (22.9°C). An average low-temperature of 54.7°F (12.6°C) is expected during September.Humidity
The average relative humidity in September in Marsh is 46%.Rainfall
In September, the rain falls for 7.8 days. Throughout September, 1.5" (38mm) of precipitation is accumulated. Throughout the year, in Marsh, there are 89.5 rainfall days, and 10.59" (269mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In Marsh, the average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 6:20 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:40 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 reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The average daily UV index of 4 in September transforms into the following instructions:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Marsh, MT
- Average high temperature in September: 73.2°F
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is January (25.9°F).
- Average low temperature in September: 54.7°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).
Average pressure in September
Marsh, MT
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in September
Marsh, MT
- Average wind speed in September: 10.3mph
The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is August (9.3mph).
Average humidity in September
Marsh, MT
- Average humidity in September: 46%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (43%).
Average rainfall in September
Marsh, MT
- Average rainfall in September: 1.5"
The wettest month (with the highest rainfall) is May (1.73").
The driest months (with the least rainfall) are January, March and November (0.35").
Average rainfall days in September
Marsh, MT
- Average rainfall days in September: 7.8 days
The month with the highest number of rainy days is June (12.1 days).
The month with the least rainy days is February (3.1 days).
Average snowfall in September
Marsh, MT
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.68").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Marsh, MT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Marsh, MT
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 10h and 18min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days in September
Marsh, MT
- Average sunshine days in September: 20 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (14.9 days).
Average UV index in September
Marsh, 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 November and December (UV index 1).
Average cloud cover in September
Marsh, MT
- Average cloud cover in September: 22
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 17).
Average visibility in September
Marsh, 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).
