September weather forecastBuffalo, WY
September
Weather in September
As the calendars flip over to September, Buffalo starts hinting towards the upcoming season of fall. Canopies of trees begin to change their colors, painting a distinct contrast against transitioning temperatures. The mercury no longer sores with average temperature falling down to 68.2°F (20.1°C). As the transition between September to October takes place, expect weather to cool further while bestowing an exquisite display of fall colors. The shorter days and cooler nights nod towards the creeping in of another winter around the corner.Temperature
September shows a mild decline in the average high-temperature, falling from August's moderately hot 77.2°F (25.1°C) to an agreeable 68.2°F (20.1°C). September brings an average low-temperature of 49.1°F (9.5°C) to Buffalo.Humidity
The average relative humidity in September in Buffalo is 47%.Rainfall
In September, the rain falls for 11.8 days. Throughout September, 1.34" (34mm) of precipitation is accumulated. In Buffalo, during the entire year, the rain falls for 145.3 days and collects up to 18.78" (477mm) of precipitation.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.5 snowfall days, it receives 0.94" (24mm) of snow. Throughout the year, in Buffalo, there are 78 snowfall days, and 39.13" (994mm) of snow is accumulated.Daylight
In Buffalo, Wyoming, the average length of the day in September is 12h and 30min.On the first day of the month, sunrise is at 6:30 am and sunset at 7:42 pm. On the last day of September, in Buffalo, sunrise is at 7:04 am and sunset at 6:48 pm MDT.
Sunshine
In September, the average sunshine in Buffalo is 10.9h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A daily high UV index of 4 in September leads to these guidelines:
Ensure safety - Recommendations to avert sunburn are presented. Around midday, solar radiation is most harmful; hence, exposure should be limited. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Buffalo, WY
- Average high temperature in September: 68.2°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is February (28.9°F).
- Average low temperature in September: 49.1°F
The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is February (14°F).
Average pressure in September
Buffalo, WY
- Average pressure in September: 29.93"Hg
The months with the highest atmospheric pressure are January and December (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Buffalo, WY
- Average wind speed in September: 6.4mph
The windiest month (with the highest average wind speed) is April (7.8mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in September
Buffalo, WY
- Average humidity in September: 47%
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is August (44%).
Average rainfall in September
Buffalo, WY
- Average rainfall in September: 1.34"
The wettest month (with the highest rainfall) is May (3.35").
The driest month (with the least rainfall) is December (0.47").
Average rainfall days in September
Buffalo, WY
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is May (21.2 days).
The month with the least rainy days is December (5 days).
Average snowfall in September
Buffalo, WY
- Average snowfall in September: 0.94"
The month with the highest snowfall is April (7.05").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Buffalo, WY
- Average snowfall days in September: 0.5 days
The month with the highest number of snowfall days is February (13.7 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Buffalo, WY
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 10h and 54min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 18min).
Average sunshine days in September
Buffalo, WY
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is December (19.4 days).
The month with the least sunshine days is May (5.5 days).
Average UV index in September
Buffalo, WY
- 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, April, October, November and December (UV index 2).
Average cloud cover in September
Buffalo, WY
- Average cloud cover in September: 17
The month with the most cloud cover is April (Cloud cover 38).
The months with the least cloud cover are July and September (Cloud cover 17).
Average visibility in September
Buffalo, WY
- 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).
