Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September sees a slight reduction in average high-temperature, with a shift from a moderately hot 81.1°F (27.3°C) in August to a pleasant 72.5°F (22.5°C). Throughout September, the average low-temperature in Glenrock records at a fresh 51.1°F (10.6°C).Humidity
In Glenrock, the average relative humidity in September is 41%.Rainfall
In Glenrock, in September, during 8.2 rainfall days, 0.67" (17mm) of precipitation is typically accumulated. Throughout the year, there are 101.1 rainfall days, and 11.54" (293mm) of precipitation is accumulated.Snowfall
Months with snowfall in Glenrock are January through May, September through December. September is the first month it typically snows in Glenrock. Throughout September, in the average 0.3 snowfall days, it receives 0.2" (5mm) of snow. Throughout the year, there are 65.9 snowfall days, and 33.03" (839mm) of snow is accumulated.Daylight
In Glenrock, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:29 am and sunset at 7:37 pm. On the last day of September, in Glenrock, sunrise is at 7:00 am and sunset at 6:45 pm MDT.
Sunshine
The average sunshine in September is 10.9h.UV index
In Glenrock, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: In September, a regular UV index of 4 translates into these guidelines:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Frequently asked questions
What is the average September temperature in Glenrock?
What is the average humidity in September in Glenrock?
How many days does it rain in September in Glenrock?
When does it start snowing in Glenrock?
What is the average length of the day in September in Glenrock?
When is the sunrise / sunset in September in Glenrock?
How long on average sun shines in September in Glenrock?
What is the UV index reading in September in Glenrock?
Average temperature in September
Glenrock, WY
- Average high temperature in September: 72.5°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is December (29.3°F).
- Average low temperature in September: 51.1°F
The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is December (16.2°F).
Average pressure in September
Glenrock, WY
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Glenrock, WY
- Average wind speed in September: 9.8mph
The windiest month (with the highest average wind speed) is January (13mph).
The calmest months (with the lowest average wind speed) are July and August (8.8mph).
Average humidity in September
Glenrock, WY
- Average humidity in September: 41%
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is August (39%).
Average rainfall in September
Glenrock, WY
- Average rainfall in September: 0.67"
The wettest month (with the highest rainfall) is May (1.85").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in September
Glenrock, WY
- Average rainfall days in September: 8.2 days
The month with the highest number of rainy days is May (14.8 days).
The months with the least rainy days are January and December (4.9 days).
Average snowfall in September
Glenrock, WY
- Average snowfall in September: 0.2"
The month with the highest snowfall is November (4.84").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Glenrock, WY
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is February (11.9 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Glenrock, WY
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 10h and 5min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 0min).
Average sunshine days in September
Glenrock, WY
- Average sunshine days in September: 18.7 days
The month with the most sunshine days is November (18.9 days).
The months with the least sunshine days are April and May (11.3 days).
Average UV index in September
Glenrock, WY
- Average UV index in September: 4
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, April, October, November and December (UV index 2).
Average cloud cover in September
Glenrock, WY
- Average cloud cover in September: 15
The month with the most cloud cover is February (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in September
Glenrock, 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).
Glenrock, Wyoming, USA
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