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 shift from August to September involves a decrease in the average high-temperature, dropping from a moderately hot 81.5°F (27.5°C) to an agreeable 70.7°F (21.5°C). The temperature in Vaughn dips to an average of 50.2°F (10.1°C) during September nights.Humidity
In September, the average relative humidity is 47%.Rainfall
In September, in Vaughn, the rain falls for 7.9 days. Throughout September, 0.98" (25mm) of precipitation is accumulated. Throughout the year, in Vaughn, there are 102.6 rainfall days, and 11.89" (302mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall in Vaughn. September is the first month it typically snows in Vaughn, Montana. Throughout September, in the average 0.7 snowfall days, it receives 1.61" (41mm) of snow. In Vaughn, Montana, during the entire year, snow falls for 66.6 days and aggregates up to 32.17" (817mm) of snow.Daylight
In September, the average length of the day in Vaughn, Montana, is 12h and 33min.On the first day of the month, sunrise is at 6:45 am and sunset at 8:05 pm. On the last day of September, sunrise is at 7:24 am and sunset at 7:06 pm MDT.
Sunshine
The average sunshine in September is 9.7h.UV index
The average daily maximum UV index in September in Vaughn, Montana, is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Vaughn?
What is the average humidity in September in Vaughn?
How many days does it rain in September in Vaughn?
When does it start to snow in Vaughn?
How many hours of daylight does Vaughn have in September?
When is the sunrise / sunset in September in Vaughn?
How long on average sun shines in September in Vaughn?
What is the UV index reading in September in Vaughn?
Average temperature in September
Vaughn, MT
- Average high temperature in September: 70.7°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is December (29.8°F).
- Average low temperature in September: 50.2°F
The month with the highest average low temperature is August (57.6°F).
The coldest month (with the lowest average low temperature) is December (18.1°F).
Average pressure in September
Vaughn, MT
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Vaughn, MT
- Average wind speed in September: 8.5mph
The windiest month (with the highest average wind speed) is November (11.2mph).
The calmest month (with the lowest average wind speed) is August (7.5mph).
Average humidity in September
Vaughn, MT
- Average humidity in September: 47%
The month with the highest relative humidity is January (77%).
The month with the lowest relative humidity is August (41%).
Average rainfall in September
Vaughn, MT
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is June (1.97").
The driest months (with the least rainfall) are January and July (0.59").
Average rainfall days in September
Vaughn, MT
- Average rainfall days in September: 7.9 days
The month with the highest number of rainy days is May (14.5 days).
The month with the least rainy days is November (4.4 days).
Average snowfall in September
Vaughn, MT
- Average snowfall in September: 1.61"
The month with the highest snowfall is February (5.28").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Vaughn, MT
- Average snowfall days in September: 0.7 days
The month with the highest number of snowfall days is February (12.6 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Vaughn, MT
- Average daylight in September: 12h and 3min
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 4min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 30min).
Average sunshine days in September
Vaughn, MT
- Average sunshine days in September: 20.5 days
The month with the most sunshine days is September (20.5 days).
The month with the least sunshine days is April (11.6 days).
Average UV index in September
Vaughn, 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
Vaughn, MT
- Average cloud cover in September: 23
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 13).
Average visibility in September
Vaughn, 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).
Vaughn, Montana, USA
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