September weather forecastAlberton, MT
September
Weather in September
The first month of the autumn, September, is also an enjoyable month in Alberton, Montana, with temperature in the range of an average low of 41°F (5°C) and an average high of 67.8°F (19.9°C).Temperature
With the onset of September, Alberton's average high-temperature adjusts, receding from August's moderately hot 78.4°F (25.8°C) to an enjoyable 67.8°F (19.9°C). Alberton encounters a substantial decline from its daily high to a low-temperature of 41°F (5°C) during September nights.Humidity
In September, the average relative humidity is 58%.Rainfall
In Alberton, in September, during 9.5 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. Throughout the year, there are 141.4 rainfall days, and 16.5" (419mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.4 snowfall days, it receives 0.59" (15mm) of snow. Throughout the year, there are 81.4 snowfall days, and 42.91" (1090mm) of snow is accumulated.Daylight
In Alberton, the average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 6:58 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 7:18 pm MDT.
Sunshine
The average sunshine in September is 9.4h.UV index
In Alberton, Montana, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index, 3 in September, converts into the following recommendations:
Undertake protective steps - Preventing sun damage is advised. To guard against the harmful effects of the Sun, minimize exposure during midday. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Mind you! Snow reflection can increase the intensity of 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
Alberton, MT
- Average high temperature in September: 67.8°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is December (27.9°F).
- Average low temperature in September: 41°F
The month with the highest average low temperature is August (48°F).
The coldest month (with the lowest average low temperature) is December (15.8°F).
Average pressure in September
Alberton, MT
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Alberton, MT
- Average wind speed in September: 4.2mph
The windiest month (with the highest average wind speed) is April (4.9mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in September
Alberton, MT
- Average humidity in September: 58%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are July and August (51%).
Average rainfall in September
Alberton, MT
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is April (1.97").
The driest month (with the least rainfall) is July (0.47").
Average rainfall days in September
Alberton, MT
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is April (16.7 days).
The months with the least rainy days are July and August (6.7 days).
Average snowfall in September
Alberton, MT
- Average snowfall in September: 0.59"
The month with the highest snowfall is February (10.75").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Alberton, MT
- Average snowfall days in September: 0.4 days
The month with the highest number of snowfall days is February (16.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Alberton, 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: 9h and 24min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in September
Alberton, MT
- Average sunshine days in September: 18.4 days
The month with the most sunshine days is July (22.5 days).
The months with the least sunshine days are February and April (9.2 days).
Average UV index in September
Alberton, MT
- Average UV index in September: 3
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are February, November and December (UV index 1).
Average cloud cover in September
Alberton, MT
- Average cloud cover in September: 23
The month with the most cloud cover is February (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 14).
Average visibility in September
Alberton, MT
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
