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 onset of September results in a small decrease in the average high-temperature, moderately receding from a warm 73.9°F (23.3°C) in August to an enjoyable 66.6°F (19.2°C). In Clark, September nights witness a remarkable decline from the day's zenith to a wintry 39.2°F (4°C).Humidity
In Clark, the average relative humidity in September is 52%.Rainfall
In Clark, during September, the rain falls for 8.2 days and regularly aggregates up to 0.94" (24mm) of precipitation. Throughout the year, in Clark, there are 96.7 rainfall days, and 19.76" (502mm) of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows in Clark. Throughout September, in the average 1.1 snowfall days, it receives 0.55" (14mm) of snow. In Clark, Colorado, during the entire year, snow falls for 127.2 days and aggregates up to 113.35" (2879mm) of snow.Daylight
In Clark, Colorado, the average length of the day in September is 12h and 27min.On the first day of September, sunrise is at 6:35 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:50 pm MDT.
Sunshine
In September, the average sunshine in Clark is 11h.UV index
In Clark, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The UV index of 3 in September translates into these instructions:
Act with care - The suggestion to avoid sunburn is emphasized. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Frequently asked questions
What are the temperatures in Clark in September?
What is the average humidity in September in Clark?
How many days does it rain in September in Clark?
When does it start to snow in Clark?
How many hours of daylight does Clark have in September?
When is the sunrise / sunset in September in Clark?
How long on average sun shines in September in Clark?
What is the UV index intensity in September in Clark?
Average temperature in September
Clark, CO
- Average high temperature in September: 66.6°F
The warmest month (with the highest average high temperature) is July (75.7°F).
The months with the lowest average high temperature are January and December (25.5°F).
- Average low temperature in September: 39.2°F
The month with the highest average low temperature is July (45.7°F).
The coldest month (with the lowest average low temperature) is January (7.5°F).
Average pressure in September
Clark, CO
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.24"Hg).
The months with the lowest atmospheric pressure are May and June (29.92"Hg).
Average wind speed in September
Clark, CO
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is June (7.2mph).
The calmest months (with the lowest average wind speed) are January and December (5.7mph).
Average humidity in September
Clark, CO
- Average humidity in September: 52%
The month with the highest relative humidity is February (89%).
The month with the lowest relative humidity is August (50%).
Average rainfall in September
Clark, CO
- Average rainfall in September: 0.94"
The wettest month (with the highest rainfall) is April (2.44").
The driest month (with the least rainfall) is August (0.87").
Average rainfall days in September
Clark, CO
- Average rainfall days in September: 8.2 days
The month with the highest number of rainy days is May (13.5 days).
The month with the least rainy days is February (4.1 days).
Average snowfall in September
Clark, CO
- Average snowfall in September: 0.55"
The month with the highest snowfall is January (17.95").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Clark, CO
- Average snowfall days in September: 1.1 days
The month with the highest number of snowfall days is February (19.8 days).
The month with the least snowfall days is August (0 days).
Average daylight in September /
Average sunshine in September
Clark, 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 18min).
- Average sunshine in September: 11h and 0min
The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in September
Clark, CO
- Average sunshine days in September: 17.4 days
The month with the most sunshine days is September (17.4 days).
The month with the least sunshine days is April (8.3 days).
Average UV index in September
Clark, CO
- Average UV index in September: 3
The months with the highest UV index are July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in September
Clark, CO
- Average cloud cover in September: 15
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in September
Clark, CO
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
Clark, Colorado, USA
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