September weather forecastMillburne, WY
September
Weather in September
September, the first month of the autumn in Millburne, is still a pleasant month, with an average temperature varying between 68.5°F (20.3°C) and 47.8°F (8.8°C).Temperature
September's onset introduces a mild reduction in the average high-temperature, from a moderately hot 76.6°F (24.8°C) in August to a pleasant 68.5°F (20.3°C). Nighttime temperatures hover around an average low of 47.8°F (8.8°C) in September.Humidity
The average relative humidity in September is 39%.Rainfall
In Millburne, in September, during 8 rainfall days, 0.79" (20mm) of precipitation is typically accumulated. Throughout the year, there are 112.2 rainfall days, and 11.57" (294mm) of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.7 snowfall days, it receives 0.43" (11mm) of snow. In Millburne, during the entire year, snow falls for 85.7 days and aggregates up to 41.18" (1046mm) of snow.Daylight
In Millburne, the average length of the day in September is 12h and 27min.On the first day of September, sunrise is at 6:48 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:04 pm MDT.
Sunshine
In Millburne, the average sunshine in September is 10.5h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Exercise prevention - Warding off sunburn is urged. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Experience reduced UV exposure by about half when donning a wide-brim hat. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Millburne, WY
- Average high temperature in September: 68.5°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is December (26.6°F).
- Average low temperature in September: 47.8°F
The month with the highest average low temperature is July (55.6°F).
The coldest month (with the lowest average low temperature) is January (12.2°F).
Average pressure in September
Millburne, WY
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.28"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Millburne, WY
- Average wind speed in September: 8.8mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).
Average humidity in September
Millburne, WY
- Average humidity in September: 39%
The months with the highest relative humidity are January and February (82%).
The months with the lowest relative humidity are July and August (36%).
Average rainfall in September
Millburne, WY
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is May (2.01").
The driest months (with the least rainfall) are January and July (0.63").
Average rainfall days in September
Millburne, WY
- Average rainfall days in September: 8 days
The month with the highest number of rainy days is May (16.1 days).
The month with the least rainy days is November (6 days).
Average snowfall in September
Millburne, WY
- Average snowfall in September: 0.43"
The month with the highest snowfall is March (8.78").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Millburne, WY
- Average snowfall days in September: 0.7 days
The month with the highest number of snowfall days is March (15.1 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Millburne, WY
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 10h and 30min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in September
Millburne, WY
- Average sunshine days in September: 18.8 days
The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is April (9.4 days).
Average UV index in September
Millburne, WY
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in September
Millburne, WY
- Average cloud cover in September: 13
The month with the most cloud cover is February (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 12).
Average visibility in September
Millburne, WY
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
