September weather forecastByron, WY
September
Weather in September
September, the first month of the autumn in Byron, is also an agreeable month, with an average temperature ranging between max 71.4°F (21.9°C) and min 51.3°F (10.7°C).Temperature
In the transition to September, Byron observes a drop in the average high-temperature, moving from a warm 81°F (27.2°C) in August to an agreeable 71.4°F (21.9°C). Throughout the month of September, Byron expects an average low of 51.3°F (10.7°C).Humidity
The average relative humidity in September is 42%.Rainfall
In September, in Byron, the rain falls for 9.5 days. Throughout September, 0.98" (25mm) of precipitation is accumulated. In Byron, during the entire year, the rain falls for 133.8 days and collects up to 9.8" (249mm) of precipitation.Snowfall
January through May, September through December are months with snowfall in Byron. September is the first month it typically snows in Byron. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, in Byron, Wyoming, there are 64 snowfall days, and 19.92" (506mm) of snow is accumulated.Daylight
The average length of the day in September in Byron, Wyoming, is 12h and 30min.On the first day of the month, sunrise is at 6:37 am and sunset at 7:50 pm. On the last day of September, in Byron, Wyoming, sunrise is at 7:11 am and sunset at 6:55 pm MDT.
Sunshine
The average sunshine in September is 10.8h.UV index
In September, the average daily maximum UV index in Byron, Wyoming, is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the maximum UV index of 4 transforms into these recommendations:
Undertake protective steps - Recommendations to avoid sunburn are issued. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Byron, WY
- Average high temperature in September: 71.4°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is December (27.5°F).
- Average low temperature in September: 51.3°F
The month with the highest average low temperature is July (61°F).
The coldest months (with the lowest average low temperature) are January and February (14.4°F).
Average pressure in September
Byron, WY
- Average pressure in September: 29.96"Hg
The months with the highest atmospheric pressure are January and December (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Byron, WY
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is April (8.7mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in September
Byron, WY
- Average humidity in September: 42%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (37%).
Average rainfall in September
Byron, WY
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is May (1.57").
The driest month (with the least rainfall) is December (0.51").
Average rainfall days in September
Byron, WY
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is November (8.3 days).
Average snowfall in September
Byron, WY
- Average snowfall in September: 0.04"
The month with the highest snowfall is February (4.88").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Byron, WY
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (14.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Byron, 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 48min
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: 6h and 24min).
Average sunshine days in September
Byron, WY
- Average sunshine days in September: 16.2 days
The month with the most sunshine days is December (17.2 days).
The month with the least sunshine days is May (10.2 days).
Average UV index in September
Byron, WY
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Byron, WY
- Average cloud cover in September: 16
The month with the most cloud cover is February (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 12).
Average visibility in September
Byron, 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).
