September weather forecastAugusta, MT
September
Weather in September
September, the first month of the autumn in Augusta, is also an agreeable month, with an average temperature fluctuating between 68.2°F (20.1°C) and 48.6°F (9.2°C).Temperature
The shift from August to September involves a decrease in the average high-temperature, dropping from a warm 79°F (26.1°C) to a pleasant 68.2°F (20.1°C). In Augusta, the average low-temperature during the month of September is a frosty 48.6°F (9.2°C).Humidity
In September, the average relative humidity is 48%.Rainfall
In September, the rain falls for 6.1 days. Throughout September, 0.79" (20mm) of precipitation is accumulated. In Augusta, during the entire year, the rain falls for 73.3 days and collects up to 9.17" (233mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.7 snowfall days, it receives 0.55" (14mm) of snow. In Augusta, during the entire year, snow falls for 50.3 days and aggregates up to 21.26" (540mm) of snow.Daylight
In Augusta, the average length of the day in September is 12h and 33min.On the first day of the month, sunrise is at 6:49 am and sunset at 8:09 pm. On the last day of September, sunrise is at 7:28 am and sunset at 7:10 pm MDT.
Sunshine
In September, the average sunshine is 9.7h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 4 suggests these recommendations:
Exercise prevention - Precautions against solar damage are endorsed. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Augusta, MT
- Average high temperature in September: 68.2°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is December (28.8°F).
- Average low temperature in September: 48.6°F
The month with the highest average low temperature is August (55.9°F).
The coldest month (with the lowest average low temperature) is December (16.2°F).
Average pressure in September
Augusta, MT
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Augusta, MT
- Average wind speed in September: 8.8mph
The windiest month (with the highest average wind speed) is January (11.2mph).
The calmest months (with the lowest average wind speed) are July and August (8mph).
Average humidity in September
Augusta, MT
- Average humidity in September: 48%
The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is August (42%).
Average rainfall in September
Augusta, MT
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is June (1.93").
The driest month (with the least rainfall) is December (0.35").
Average rainfall days in September
Augusta, MT
- Average rainfall days in September: 6.1 days
The month with the highest number of rainy days is May (11.3 days).
The month with the least rainy days is November (2.7 days).
Average snowfall in September
Augusta, MT
- Average snowfall in September: 0.55"
The month with the highest snowfall is February (4.17").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Augusta, MT
- Average snowfall days in September: 0.7 days
The month with the highest number of snowfall days is February (11.3 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Augusta, 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 42min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in September
Augusta, MT
- Average sunshine days in September: 21 days
The month with the most sunshine days is October (23.2 days).
The month with the least sunshine days is February (15.8 days).
Average UV index in September
Augusta, MT
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Augusta, MT
- Average cloud cover in September: 22
The month with the most cloud cover is February (Cloud cover 41).
The month with the least cloud cover is July (Cloud cover 14).
Average visibility in September
Augusta, 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).
