September weather forecastEsterbrook, WY
September
Weather in September
The first month of the autumn, September, is still a warm month in Esterbrook, Wyoming, with temperature in the range of an average low of 54°F (12.2°C) and an average high of 75.9°F (24.4°C).Temperature
Esterbrook's weather in September involves a mild decrease in the average high-temperature, moving down slightly from August's 84.4°F (29.1°C) to a still moderately hot 75.9°F (24.4°C). September nights experience a distinct temperature drop from the daily highs, with an average low-temperature of 54°F (12.2°C).Humidity
In Esterbrook, Wyoming, the average relative humidity in September is 42%.Rainfall
In Esterbrook, in September, during 7.3 rainfall days, 0.47" (12mm) of precipitation is typically accumulated. Throughout the year, in Esterbrook, there are 84.9 rainfall days, and 9.61" (244mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows in Esterbrook. Throughout September, in the average 0.3 snowfall days, it receives 0.08" (2mm) of snow. Throughout the year, in Esterbrook, there are 43 snowfall days, and 17.64" (448mm) of snow is accumulated.Daylight
The average length of the day in September in Esterbrook, Wyoming, is 12h and 28min.On the first day of September, sunrise is at 6:27 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:44 pm MDT.
Sunshine
In Esterbrook, the average sunshine in September is 10.8h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: A maximum high UV index of 4 in September translates into the following recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Esterbrook, WY
- Average high temperature in September: 75.9°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is December (33.8°F).
- Average low temperature in September: 54°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is December (19.2°F).
Average pressure in September
Esterbrook, WY
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Esterbrook, WY
- Average wind speed in September: 9.8mph
The windiest month (with the highest average wind speed) is April (11.6mph).
The calmest month (with the lowest average wind speed) is August (8.9mph).
Average humidity in September
Esterbrook, WY
- Average humidity in September: 42%
The month with the highest relative humidity is February (70%).
The month with the lowest relative humidity is August (40%).
Average rainfall in September
Esterbrook, WY
- Average rainfall in September: 0.47"
The wettest month (with the highest rainfall) is May (1.93").
The driest month (with the least rainfall) is January (0.31").
Average rainfall days in September
Esterbrook, WY
- Average rainfall days in September: 7.3 days
The month with the highest number of rainy days is May (12.4 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in September
Esterbrook, WY
- Average snowfall in September: 0.08"
The month with the highest snowfall is November (2.8").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Esterbrook, WY
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is February (8.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Esterbrook, WY
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 10h and 48min
The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 24min).
Average sunshine days in September
Esterbrook, WY
- Average sunshine days in September: 19.9 days
The month with the most sunshine days is December (21.7 days).
The month with the least sunshine days is April (14.5 days).
Average UV index in September
Esterbrook, WY
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Esterbrook, WY
- Average cloud cover in September: 17
The month with the most cloud cover is February (Cloud cover 33).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in September
Esterbrook, 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).
