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 beginning of September brings a slight decrease in the average high-temperature, transitioning from a hot 86.7°F (30.4°C) in August to a moderately hot 79.5°F (26.4°C). Despite a significant deviation from daily highs, September sees an average nighttime temperature of 56.3°F (13.5°C) in Cooper, Colorado.Humidity
The months with the lowest humidity in Cooper are August and September, with an average relative humidity of 45%.Rainfall
In Cooper, in September, it is raining for 8.5 days, with typically 0.71" (18mm) of accumulated precipitation. In Cooper, during the entire year, the rain falls for 104 days and collects up to 12.09" (307mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Cooper, the average length of the day in September is 12h and 26min.On the first day of September, sunrise is at 6:22 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:37 pm MDT.
Sunshine
In September, the average sunshine is 10.6h.UV index
The average daily maximum UV index in September in Cooper is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index, 5 in September, converts into the following recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Frequently asked questions
What is the temperature in September in Cooper?
What are the least humid months in Cooper?
What is the average humidity in September in Cooper?
How much does it rain in Cooper in September?
When it does not snow in Cooper?
Does it snow in Cooper in September?
How many hours of daylight does Cooper have in September?
What time are sunrise and sunset in September in Cooper?
How long on average sun shines in September in Cooper?
How high is the UV index in September in Cooper?
Average temperature in September
Cooper, CO
- Average high temperature in September: 79.5°F
The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is December (38.7°F).
- Average low temperature in September: 56.3°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is December (22.5°F).
Average pressure in September
Cooper, CO
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Cooper, CO
- Average wind speed in September: 8.5mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is December (7.8mph).
Average humidity in September
Cooper, CO
- Average humidity in September: 45%
The month with the highest relative humidity is January (64%).
The months with the lowest relative humidity are August and September (45%).
Average rainfall in September
Cooper, CO
- Average rainfall in September: 0.71"
The wettest month (with the highest rainfall) is May (2.2").
The driest months (with the least rainfall) are January and December (0.39").
Average rainfall days in September
Cooper, CO
- Average rainfall days in September: 8.5 days
The month with the highest number of rainy days is July (14.4 days).
The month with the least rainy days is November (2.9 days).
Average snowfall in September
Cooper, CO
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.64").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Cooper, CO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (8.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Cooper, CO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 10h and 4min
The months with the most sunshine are June, July and August (Average sunshine: 11h and 48min).
The months with the least sunshine are February and December (Average sunshine: 6h and 30min).
Average sunshine days in September
Cooper, CO
- Average sunshine days in September: 18.6 days
The month with the most sunshine days is November (23.4 days).
The month with the least sunshine days is July (12.8 days).
Average UV index in September
Cooper, CO
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Cooper, CO
- Average cloud cover in September: 17
The month with the most cloud cover is February (Cloud cover 31).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in September
Cooper, CO
- 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).
Cooper, Colorado, USA
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