September weather forecastPackers Roost, MT
September
Weather in September
September, the first month of the autumn in Packers Roost, is still a comfortable month, with an average temperature fluctuating between 37.8°F (3.2°C) and 61°F (16.1°C).Temperature
The shift from August to September involves a decrease in the average high-temperature, from a pleasant 72°F (22.2°C) to a comfortable 61°F (16.1°C). In September, Packers Roost endures a notable temperature shift from day to night, with lows averaging at an icy 37.8°F (3.2°C).Humidity
In Packers Roost, the average relative humidity in September is 64%.Rainfall
In Packers Roost, during September, the rain falls for 8.8 days and regularly aggregates up to 0.87" (22mm) of precipitation. In Packers Roost, during the entire year, the rain falls for 118.6 days and collects up to 20.75" (527mm) of precipitation.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows in Packers Roost. Throughout September, in the average 1.2 snowfall days, it receives 1.02" (26mm) of snow. Throughout the year, in Packers Roost, there are 128.7 snowfall days, and 92.13" (2340mm) of snow is accumulated.Daylight
The average length of the day in September is 12h and 34min.On the first day of the month, sunrise is at 6:53 am and sunset at 8:16 pm. On the last day of September, in Packers Roost, sunrise is at 7:34 am and sunset at 7:15 pm MDT.
Sunshine
In Packers Roost, the average sunshine in September is 9.3h.UV index
The average daily maximum UV index in September in Packers Roost is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: A daily maximum UV index of 3 in September translates into the following instructions:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Around midday, solar radiation is most harmful; hence, exposure should be limited. Stay sun-safe with clothing that is both closely woven and worn loosely. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Packers Roost, MT
- Average high temperature in September: 61°F
The warmest month (with the highest average high temperature) is July (73°F).
The month with the lowest average high temperature is December (23.2°F).
- Average low temperature in September: 37.8°F
The months with the highest average low temperature are July and August (44.2°F).
The coldest month (with the lowest average low temperature) is February (10.9°F).
Average pressure in September
Packers Roost, MT
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Packers Roost, MT
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is November (7mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
Packers Roost, MT
- Average humidity in September: 64%
The month with the highest relative humidity is January (93%).
The month with the lowest relative humidity is August (56%).
Average rainfall in September
Packers Roost, MT
- Average rainfall in September: 0.87"
The wettest month (with the highest rainfall) is January (2.56").
The driest month (with the least rainfall) is August (0.71").
Average rainfall days in September
Packers Roost, MT
- Average rainfall days in September: 8.8 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in September
Packers Roost, MT
- Average snowfall in September: 1.02"
The month with the highest snowfall is January (20.16").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Packers Roost, MT
- Average snowfall days in September: 1.2 days
The month with the highest number of snowfall days is December (22.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Packers Roost, MT
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in September: 9h and 18min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in September
Packers Roost, MT
- Average sunshine days in September: 18.4 days
The month with the most sunshine days is August (19.6 days).
The month with the least sunshine days is February (7.2 days).
Average UV index in September
Packers Roost, MT
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in September
Packers Roost, MT
- Average cloud cover in September: 27
The month with the most cloud cover is January (Cloud cover 71).
The months with the least cloud cover are July and August (Cloud cover 17).
Average visibility in September
Packers Roost, 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).
