September weather forecastWalkerville, MT
September
Weather in September
September, the first month of the autumn in Walkerville, is still a refreshing month, with temperature in the range of an average high of 64.9°F (18.3°C) and an average low of 40.1°F (4.5°C).Temperature
During the transition into September, Walkerville observes a decrease in the average high-temperature, falling from a moderately hot 74.8°F (23.8°C) in August to an enjoyable 64.9°F (18.3°C). The temperature notes a substantial fall from the daily peak to an average of 40.1°F (4.5°C) during September nights.Humidity
In September, the average relative humidity in Walkerville is 54%.Rainfall
In Walkerville, in September, during 8.5 rainfall days, 1.06" (27mm) of precipitation is typically accumulated. Throughout the year, there are 102.5 rainfall days, and 13.74" (349mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. September is the first month it typically snows in Walkerville. Throughout September, in the average 1.1 snowfall days, it receives 1.65" (42mm) of snow. Throughout the year, in Walkerville, Montana, there are 103.1 snowfall days, and 52.56" (1335mm) of snow is accumulated.Daylight
In Walkerville, the average length of the day in September is 12h and 31min.On the first day of the month, sunrise is at 6:51 am and sunset at 8:07 pm. On the last day of September, sunrise is at 7:28 am and sunset at 7:11 pm MDT.
Sunshine
The average sunshine in September is 9.5h.UV index
In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: A maximum UV index of 3 in September translates into the following recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Walkerville, MT
- Average high temperature in September: 64.9°F
The warmest month (with the highest average high temperature) is July (76.5°F).
The month with the lowest average high temperature is December (25.2°F).
- Average low temperature in September: 40.1°F
The month with the highest average low temperature is July (46.9°F).
The coldest month (with the lowest average low temperature) is December (9°F).
Average pressure in September
Walkerville, MT
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.21"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Walkerville, MT
- Average wind speed in September: 5.6mph
The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Walkerville, MT
- Average humidity in September: 54%
The months with the highest relative humidity are January, February and December (87%).
The month with the lowest relative humidity is July (48%).
Average rainfall in September
Walkerville, MT
- Average rainfall in September: 1.06"
The wettest month (with the highest rainfall) is May (2.24").
The driest months (with the least rainfall) are January, November and December (0.67").
Average rainfall days in September
Walkerville, MT
- Average rainfall days in September: 8.5 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is November (4.1 days).
Average snowfall in September
Walkerville, MT
- Average snowfall in September: 1.65"
The month with the highest snowfall is March (8.74").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Walkerville, MT
- Average snowfall days in September: 1.1 days
The month with the highest number of snowfall days is February (17.7 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Walkerville, MT
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 9h and 30min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in September
Walkerville, MT
- Average sunshine days in September: 18.9 days
The month with the most sunshine days is August (19.1 days).
The month with the least sunshine days is April (9.8 days).
Average UV index in September
Walkerville, MT
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in September
Walkerville, MT
- Average cloud cover in September: 23
The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in September
Walkerville, 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 and December (4mi).
