September weather forecastMuddy, MT
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Muddy, Montana, with an average temperature varying between 73.8°F (23.2°C) and 53.2°F (11.8°C).Temperature
Muddy's weather in September involves a decrease in the average high-temperature, moving down from August's warm 83.3°F (28.5°C) to a still moderately hot 73.8°F (23.2°C). In September, the average low-temperature is a fresh 53.2°F (11.8°C).Humidity
In Muddy, the average relative humidity in September is 45%.Rainfall
In Muddy, in September, during 10.3 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. Throughout the year, in Muddy, there are 113.9 rainfall days, and 14.84" (377mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.16" (4mm) of snow. In Muddy, Montana, during the entire year, snow falls for 55.2 days and aggregates up to 23.5" (597mm) of snow.Daylight
In Muddy, the average length of the day in September is 12h and 31min.On the first day of September, sunrise is at 6:29 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:48 pm MDT.
Sunshine
In September, the average sunshine in Muddy, Montana, is 10.4h.UV index
In Muddy, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index of 4 during September translates into these guidelines:
Guard yourself - An obligation to protect skin and eyes from harm exists. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Muddy, MT
- Average high temperature in September: 73.8°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 (30.4°F).
- Average low temperature in September: 53.2°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (16°F).
Average pressure in September
Muddy, MT
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Muddy, MT
- Average wind speed in September: 8.4mph
The windiest month (with the highest average wind speed) is April (10mph).
The calmest months (with the lowest average wind speed) are July and August (7.8mph).
Average humidity in September
Muddy, MT
- Average humidity in September: 45%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (42%).
Average rainfall in September
Muddy, MT
- Average rainfall in September: 1.38"
The wettest month (with the highest rainfall) is May (2.56").
The driest month (with the least rainfall) is December (0.47").
Average rainfall days in September
Muddy, MT
- Average rainfall days in September: 10.3 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in September
Muddy, MT
- Average snowfall in September: 0.16"
The month with the highest snowfall is February (4.33").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Muddy, MT
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is February (10.4 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Muddy, MT
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 10h and 24min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in September
Muddy, MT
- Average sunshine days in September: 16.8 days
The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in September
Muddy, 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, April, November and December (UV index 2).
Average cloud cover in September
Muddy, MT
- Average cloud cover in September: 21
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in September
Muddy, 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).
