Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The onset of September introduces a moderate change in White Sulphur Springs's weather, with average high-temperatures falling from August's moderately hot 77.5°F (25.3°C) to an enjoyable 67.1°F (19.5°C). White Sulphur Springs's September nights cool down significantly from the day's heat, to an average low-temperature of 42.4°F (5.8°C).Humidity
In September, the average relative humidity is 54%.Rainfall
In White Sulphur Springs, Montana, during September, the rain falls for 8.7 days and regularly aggregates up to 1.1" (28mm) of precipitation. Throughout the year, in White Sulphur Springs, there are 103.1 rainfall days, and 13.31" (338mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. September is the first month it typically snows in White Sulphur Springs. Throughout September, in the average 1.4 snowfall days, it receives 1.85" (47mm) of snow. In White Sulphur Springs, during the entire year, snow falls for 97.8 days and aggregates up to 52.68" (1338mm) of snow.Daylight
The average length of the day in September in White Sulphur Springs, Montana, is 12h and 32min.On the first day of the month, sunrise is at 6:44 am and sunset at 8:01 pm. On the last day of September, sunrise is at 7:22 am and sunset at 7:04 pm MDT.
Sunshine
In September, the average sunshine is 10.2h.UV index
In White Sulphur Springs, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The UV index of 3 in September translates into these instructions:
Guard yourself - Precautionary measures against sun damage are advocated. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Frequently asked questions
What is the temperature in September in White Sulphur Springs?
What is the average humidity in September in White Sulphur Springs?
How many days does it rain in September in White Sulphur Springs?
When does it start to snow in White Sulphur Springs?
How many hours of daylight does White Sulphur Springs have in September?
What time are sunrise and sunset in September in White Sulphur Springs?
How many hours of sunshine does White Sulphur Springs have in September?
How high is the UV index in September in White Sulphur Springs?
Average temperature in September
White Sulphur Springs, MT
- Average high temperature in September: 67.1°F
The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is December (25.3°F).
- Average low temperature in September: 42.4°F
The month with the highest average low temperature is July (48.7°F).
The coldest month (with the lowest average low temperature) is December (10.9°F).
Average pressure in September
White Sulphur Springs, MT
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
White Sulphur Springs, MT
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is April (5.9mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in September
White Sulphur Springs, MT
- Average humidity in September: 54%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is August (48%).
Average rainfall in September
White Sulphur Springs, MT
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is May (2.05").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in September
White Sulphur Springs, MT
- Average rainfall days in September: 8.7 days
The month with the highest number of rainy days is May (15.1 days).
The month with the least rainy days is November (3.8 days).
Average snowfall in September
White Sulphur Springs, MT
- Average snowfall in September: 1.85"
The month with the highest snowfall is February (9.61").
The months with the least snowfall are July and August (0").
Average snowfall days in September
White Sulphur Springs, MT
- Average snowfall days in September: 1.4 days
The month with the highest number of snowfall days is February (16.5 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
White Sulphur Springs, MT
- Average daylight in September: 12h and 3min
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: 10h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days in September
White Sulphur Springs, MT
- Average sunshine days in September: 18.4 days
The month with the most sunshine days is September (18.4 days).
The month with the least sunshine days is April (10.6 days).
Average UV index in September
White Sulphur Springs, 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 and December (UV index 1).
Average cloud cover in September
White Sulphur Springs, MT
- Average cloud cover in September: 20
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in September
White Sulphur Springs, MT
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
White Sulphur Springs, Montana, USA
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