September weather forecastLaramie, WY
September
Weather in September
September in Laramie, Wyoming, sees a smooth transition from simmering summer to the golden tones of fall. The scorching sun softens to a welcoming warm glow, coloring the foliage in hues of yellow and orange. A slight nip returns to the air as the temperature ranges from 46.8°F (8.2°C) in the mornings to a cool 68.4°F (20.2°C) during the day. The change in weather indicates a shift in the seasonal energy. Outdoor enthusiasts find joy in the serene atmosphere that accompanies the onset of the autumn season.Temperature
As August shifts into September, a minor alteration in temperatures is observed, with average highs reducing from a moderately hot 75.7°F (24.3°C) to an agreeable 68.4°F (20.2°C). Laramie records a consistent low-temperature average of 46.8°F (8.2°C) during September, indicating a significant difference from the daytime heat.Humidity
In September, the average relative humidity is 44%.Rainfall
In Laramie, during September, the rain falls for 9.9 days and regularly aggregates up to 0.98" (25mm) of precipitation. Throughout the year, there are 101.6 rainfall days, and 14.33" (364mm) 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 0.35" (9mm) of snow. Throughout the year, in Laramie, there are 77.7 snowfall days, and 44.8" (1138mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 28min.On the first day of the month, sunrise is at 6:29 am and sunset at 7:34 pm. On the last day of September, sunrise is at 6:58 am and sunset at 6:45 pm MDT.
Sunshine
In September, the average sunshine is 10.9h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high UV index of 4 in September translates into the following recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Laramie, WY
- Average high temperature in September: 68.4°F
The warmest month (with the highest average high temperature) is July (76.8°F).
The month with the lowest average high temperature is December (28.2°F).
- Average low temperature in September: 46.8°F
The month with the highest average low temperature is July (54.1°F).
The coldest month (with the lowest average low temperature) is December (14.4°F).
Average pressure in September
Laramie, WY
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Laramie, WY
- Average wind speed in September: 10.9mph
The windiest month (with the highest average wind speed) is January (14.5mph).
The calmest month (with the lowest average wind speed) is July (9.3mph).
Average humidity in September
Laramie, WY
- Average humidity in September: 44%
The months with the highest relative humidity are January and February (75%).
The month with the lowest relative humidity is August (43%).
Average rainfall in September
Laramie, WY
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is May (2.68").
The driest month (with the least rainfall) is January (0.35").
Average rainfall days in September
Laramie, WY
- Average rainfall days in September: 9.9 days
The months with the highest number of rainy days are May and July (15.1 days).
The months with the least rainy days are January, February and November (2.9 days).
Average snowfall in September
Laramie, WY
- Average snowfall in September: 0.35"
The month with the highest snowfall is April (9.76").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Laramie, WY
- Average snowfall days in September: 0.7 days
The month with the highest number of snowfall days is April (12.5 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Laramie, 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 54min
The month with the most sunshine is July (Average sunshine: 11h and 36min).
The months with the least sunshine are February and December (Average sunshine: 6h and 30min).
Average sunshine days in September
Laramie, WY
- Average sunshine days in September: 16.2 days
The month with the most sunshine days is January (21.4 days).
The month with the least sunshine days is May (8.9 days).
Average UV index in September
Laramie, 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
Laramie, WY
- Average cloud cover in September: 17
The month with the most cloud cover is February (Cloud cover 34).
The month with the least cloud cover is September (Cloud cover 17).
Average visibility in September
Laramie, 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).
