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
The move into September indicates a reduction in the average high-temperature, down from August's pleasant 72.1°F (22.3°C) to an enjoyable 62.8°F (17.1°C). A noticeable downturn in temperature characterizes the September nights, averaging at a cold 37.2°F (2.9°C).Humidity
In September, the average relative humidity is 57%.Rainfall
In September, the rain falls for 10.8 days. Throughout September, 1.77" (45mm) of precipitation is accumulated. Throughout the year, there are 103 rainfall days, and 29.84" (758mm) of precipitation is accumulated.Snowfall
Months with snowfall in Rafter J Ranch, Wyoming, are January through December. In Rafter J Ranch, in September, snow falls for 3.3 days, with typically accumulated 5.12" (130mm) of snow. Throughout the year, there are 173.6 snowfall days, and 181.26" (4604mm) of snow is accumulated.Daylight
The average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:48 am and sunset at 7:57 pm. On the last day of September, sunrise is at 7:20 am and sunset at 7:05 pm MDT.
Sunshine
The average sunshine in September is 10h.UV index
The average daily maximum UV index in September is 2. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: In September, the maximum UV index of 2 suggests these recommendations:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. To protect against the Sun's most potent rays, avoid direct exposure around midday. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How many days does it rain in September?
How many days does it snow in September?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How long on average sun shines in September in Rafter J Ranch?
What is the UV index reading in September?
Average temperature in September
Rafter J Ranch, WY
- Average high temperature in September: 62.8°F
The warmest month (with the highest average high temperature) is July (73.4°F).
The month with the lowest average high temperature is December (21.9°F).
- Average low temperature in September: 37.2°F
The month with the highest average low temperature is July (43.5°F).
The coldest month (with the lowest average low temperature) is January (4.8°F).
Average pressure in September
Rafter J Ranch, WY
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Rafter J Ranch, WY
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is June (5.7mph).
The calmest month (with the lowest average wind speed) is December (4.3mph).
Average humidity in September
Rafter J Ranch, WY
- Average humidity in September: 57%
The month with the highest relative humidity is February (94%).
The month with the lowest relative humidity is August (50%).
Average rainfall in September
Rafter J Ranch, WY
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is February (3.54").
The driest month (with the least rainfall) is August (1.34").
Average rainfall days in September
Rafter J Ranch, WY
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is January (2.9 days).
Average snowfall in September
Rafter J Ranch, WY
- Average snowfall in September: 5.12"
The month with the highest snowfall is February (29.33").
The month with the least snowfall is August (0.12").
Average snowfall days in September
Rafter J Ranch, WY
- Average snowfall days in September: 3.3 days
The month with the highest number of snowfall days is March (24.8 days).
The month with the least snowfall days is July (0.4 days).
Average daylight in September /
Average sunshine in September
Rafter J Ranch, WY
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 10h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 36min).
The month with the least sunshine is February (Average sunshine: 3h and 24min).
Average sunshine days in September
Rafter J Ranch, WY
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is July (15.6 days).
The month with the least sunshine days is April (3.8 days).
Average UV index in September
Rafter J Ranch, WY
- Average UV index in September: 2
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 1).
Average cloud cover in September
Rafter J Ranch, WY
- Average cloud cover in September: 21
The month with the most cloud cover is February (Cloud cover 72).
The months with the least cloud cover are July and August (Cloud cover 16).
Average visibility in September
Rafter J Ranch, WY
- Average visibility in September: 6mi
The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January, February, March and December (3mi).
Rafter J Ranch, Wyoming, USA
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