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
With the arrival of September, Shell notices a mild change in the average high-temperature, sliding from August's enjoyable 67.5°F (19.7°C) to a moderate 59.7°F (15.4°C). Shell in September anticipates an average nighttime temperature of 40.5°F (4.7°C).Humidity
In Shell, the average relative humidity in September is 54%.Rainfall
In Shell, in September, it is raining for 9.7 days, with typically 1.3" (33mm) of accumulated precipitation. In Shell, during the entire year, the rain falls for 94.3 days and collects up to 19.13" (486mm) of precipitation.Snowfall
January through June, August through December are months with snowfall. In Shell, during September, snow falls for 3.1 days and regularly aggregates up to 3.43" (87mm) of snow. Throughout the year, in Shell, there are 113.3 snowfall days, and 89.02" (2261mm) of snow is accumulated.Daylight
The average length of the day in September is 12h and 30min.On the first day of the month, sunrise is at 6:34 am and sunset at 7:47 pm. On the last day of September, sunrise is at 7:08 am and sunset at 6:52 pm MDT.
Sunshine
In Shell, the average sunshine in September is 10.6h.UV index
In Shell, Wyoming, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: In September, an average UV index of 3 transforms into the following instructions:
Guard yourself - Precautionary measures against sun damage are advocated. The solar radiation around mid-day is intense; avoid the Sun and stay safe. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Frequently asked questions
What are September temperatures in Shell?
What is the average humidity in September in Shell?
How much does it rain in Shell in September?
How many days does it snow in September in Shell?
How many hours of daylight does Shell have in September?
What time are sunrise and sunset in September in Shell?
How long on average sun shines in September in Shell?
What is the UV index reading in September in Shell?
Average temperature in September
Shell, WY
- Average high temperature in September: 59.7°F
The warmest month (with the highest average high temperature) is July (69.4°F).
The month with the lowest average high temperature is December (20.8°F).
- Average low temperature in September: 40.5°F
The month with the highest average low temperature is July (48.7°F).
The coldest month (with the lowest average low temperature) is December (2.3°F).
Average pressure in September
Shell, WY
- Average pressure in September: 29.94"Hg
The months with the highest atmospheric pressure are January and December (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Shell, WY
- Average wind speed in September: 5.4mph
The windiest month (with the highest average wind speed) is June (6.3mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in September
Shell, WY
- Average humidity in September: 54%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is August (51%).
Average rainfall in September
Shell, WY
- Average rainfall in September: 1.3"
The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is December (0.75").
Average rainfall days in September
Shell, WY
- Average rainfall days in September: 9.7 days
The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is November (2.3 days).
Average snowfall in September
Shell, WY
- Average snowfall in September: 3.43"
The month with the highest snowfall is May (19.33").
The month with the least snowfall is July (0").
Average snowfall days in September
Shell, WY
- Average snowfall days in September: 3.1 days
The month with the highest number of snowfall days is January (15.8 days).
The month with the least snowfall days is July (0 days).
Average daylight in September /
Average sunshine in September
Shell, WY
- Average daylight in September: 12h and 3min
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 4min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Shell, WY
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is June (8.6 days).
Average UV index in September
Shell, WY
- Average UV index in September: 3
The month with the highest UV index is July (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
Shell, WY
- Average cloud cover in September: 19
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 16).
Average visibility in September
Shell, WY
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).
Shell, Wyoming, USA
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