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
Clifton's weather changes with the onset of September, slightly falling from a moderately hot 82.9°F (28.3°C) in August to an agreeable 72.5°F (22.5°C). Clifton registers a significant drop in temperature in September, with average nighttime lows of 46.6°F (8.1°C).Humidity
In Clifton, the average relative humidity in September is 45%.Rainfall
In Clifton, during September, the rain falls for 7.5 days and regularly aggregates up to 1.14" (29mm) of precipitation. In Clifton, during the entire year, the rain falls for 127.4 days and collects up to 18.27" (464mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.35" (9mm) of snow. Throughout the year, there are 83.8 snowfall days, and 60.12" (1527mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 28min.On the first day of September in Clifton, sunrise is at 6:54 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:10 pm MDT.
Sunshine
The average sunshine in September is 10h.UV index
In September, the average daily maximum UV index in Clifton, Idaho, is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 4 during September translates into the following directions:
Act with care - The suggestion to avoid sunburn is emphasized. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How many days does it rain in September?
When does it start snowing?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Clifton have in September?
What is the UV index intensity in September?
Average temperature in September
Clifton, ID
- Average high temperature in September: 72.5°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is December (28.8°F).
- Average low temperature in September: 46.6°F
The month with the highest average low temperature is July (53.8°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in September
Clifton, ID
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.3"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Clifton, ID
- Average wind speed in September: 5.4mph
The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is January (4.2mph).
Average humidity in September
Clifton, ID
- Average humidity in September: 45%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (38%).
Average rainfall in September
Clifton, ID
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is February (2.24").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in September
Clifton, ID
- Average rainfall days in September: 7.5 days
The month with the highest number of rainy days is April (16.6 days).
The month with the least rainy days is July (5.5 days).
Average snowfall in September
Clifton, ID
- Average snowfall in September: 0.35"
The month with the highest snowfall is January (16.73").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Clifton, ID
- Average snowfall days in September: 0.1 days
The months with the highest number of snowfall days are January and February (17.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Clifton, ID
- Average daylight in September: 12h and 3min
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 12min).
- Average sunshine in September: 10h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in September
Clifton, ID
- Average sunshine days in September: 18.8 days
The month with the most sunshine days is July (21.8 days).
The month with the least sunshine days is February (8.3 days).
Average UV index in September
Clifton, ID
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Clifton, ID
- Average cloud cover in September: 15
The month with the most cloud cover is February (Cloud cover 51).
The months with the least cloud cover are July and August (Cloud cover 10).
Average visibility in September
Clifton, ID
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).
Clifton, Idaho, USA
Weather forecast for your location
2. Allow the app to use your location