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
During the shift to September, Clifton records a mild decrease in average high-temperature, moving from a moderately hot 82°F (27.8°C) in August to a still warm 74.7°F (23.7°C). Clifton observes a substantial disparity between daytime high and the average low-temperature of 50.5°F (10.3°C) during September nights.Humidity
The average relative humidity in September in Clifton is 42%.Rainfall
In September, in Clifton, the rain falls for 11.9 days. Throughout September, 1.06" (27mm) of precipitation is accumulated. Throughout the year, in Clifton, there are 127.9 rainfall days, and 13.35" (339mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September in Clifton, Colorado, is 12h and 26min.On the first day of September, sunrise is at 6:43 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:57 pm MDT.
Sunshine
In Clifton, the average sunshine in September is 11h.UV index
In September, the average daily maximum UV index in Clifton is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Heed the precautions - It is counselled to guard against solar damage. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Frequently asked questions
What are the temperatures in Clifton in September?
What is the average humidity in September in Clifton?
How many days does it rain in September in Clifton?
When it does not snow in Clifton?
Does it snow in Clifton in September?
How many hours of daylight does Clifton have in September?
What time are sunrise and sunset in September in Clifton?
How long on average sun shines in September in Clifton?
What is the UV index intensity in September in Clifton?
Average temperature in September
Clifton, CO
- Average high temperature in September: 74.7°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (33.3°F).
- Average low temperature in September: 50.5°F
The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).
Average pressure in September
Clifton, CO
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.27"Hg).
The months with the lowest atmospheric pressure are May and June (29.91"Hg).
Average wind speed in September
Clifton, CO
- Average wind speed in September: 5.9mph
The windiest month (with the highest average wind speed) is June (7.2mph).
The calmest month (with the lowest average wind speed) is January (4.1mph).
Average humidity in September
Clifton, CO
- Average humidity in September: 42%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is June (32%).
Average rainfall in September
Clifton, CO
- Average rainfall in September: 1.06"
The wettest month (with the highest rainfall) is March (1.42").
The driest month (with the least rainfall) is November (0.79").
Average rainfall days in September
Clifton, CO
- Average rainfall days in September: 11.9 days
The month with the highest number of rainy days is April (14.8 days).
The month with the least rainy days is November (7 days).
Average snowfall in September
Clifton, CO
- Average snowfall in September: 0"
The month with the highest snowfall is December (5.39").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Clifton, CO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Clifton, CO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 11h and 0min
The months with the most sunshine are June and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 6h and 12min).
Average sunshine days in September
Clifton, CO
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is November (21 days).
The month with the least sunshine days is August (11.2 days).
Average UV index in September
Clifton, CO
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Clifton, CO
- Average cloud cover in September: 12
The months with the most cloud cover are January and February (Cloud cover 33).
The months with the least cloud cover are June and September (Cloud cover 12).
Average visibility in September
Clifton, CO
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Clifton, Colorado, USA
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