September weather forecastCorette, MT
September
Weather in September
September, the first month of the autumn in Corette, is still a comfortable month, with an average temperature fluctuating between 61.9°F (16.6°C) and 37.6°F (3.1°C).Temperature
A decrease in the average high-temperature is observed during September, shifting from a pleasant 71.4°F (21.9°C) in August to a refreshing 61.9°F (16.6°C). Marked by a significant drop from the daytime highs, Corette's average low-temperature in September stands at an icy 37.6°F (3.1°C).Humidity
In Corette, the average relative humidity in September is 57%.Rainfall
In Corette, during September, the rain falls for 10.5 days and regularly aggregates up to 1.57" (40mm) of precipitation. In Corette, during the entire year, the rain falls for 109.2 days and collects up to 23.15" (588mm) of precipitation.Snowfall
January through July, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 2.4 snowfall days, it receives 3.27" (83mm) of snow. In Corette, Montana, during the entire year, snow falls for 159.3 days and aggregates up to 120.47" (3060mm) of snow.Daylight
The average length of the day in September in Corette is 12h and 30min.On the first day of September, sunrise is at 6:48 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 7:06 pm MDT.
Sunshine
The average sunshine in September is 9.8h.UV index
The average daily maximum UV index in September is 2. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: In September, a daily UV index of 2 turns into the following recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Corette, MT
- Average high temperature in September: 61.9°F
The warmest month (with the highest average high temperature) is July (72.9°F).
The month with the lowest average high temperature is December (20.1°F).
- Average low temperature in September: 37.6°F
The month with the highest average low temperature is August (43.7°F).
The coldest month (with the lowest average low temperature) is December (4.8°F).
Average pressure in September
Corette, MT
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.24"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Corette, MT
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is June (6.8mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in September
Corette, MT
- Average humidity in September: 57%
The month with the highest relative humidity is February (95%).
The month with the lowest relative humidity is August (50%).
Average rainfall in September
Corette, MT
- Average rainfall in September: 1.57"
The wettest month (with the highest rainfall) is May (2.8").
The driest month (with the least rainfall) is July (0.91").
Average rainfall days in September
Corette, MT
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (2.2 days).
Average snowfall in September
Corette, MT
- Average snowfall in September: 3.27"
The month with the highest snowfall is February (17.83").
The month with the least snowfall is August (0").
Average snowfall days in September
Corette, MT
- Average snowfall days in September: 2.4 days
The month with the highest number of snowfall days is March (24.4 days).
The months with the least snowfall days are July and August (0.2 days).
Average daylight in September /
Average sunshine in September
Corette, MT
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 9h and 48min
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: 3h and 18min).
Average sunshine days in September
Corette, MT
- Average sunshine days in September: 14.7 days
The months with the most sunshine days are July and September (14.7 days).
The month with the least sunshine days is February (5.3 days).
Average UV index in September
Corette, MT
- Average UV index in September: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 1).
Average cloud cover in September
Corette, MT
- Average cloud cover in September: 22
The month with the most cloud cover is February (Cloud cover 76).
The month with the least cloud cover is July (Cloud cover 16).
Average visibility in September
Corette, MT
- Average visibility in September: 6mi
The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January, February, March and December (3mi).
