September weather forecastClark, CO
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Clark, Colorado, with an average temperature ranging between max 66.6°F (19.2°C) and min 39.2°F (4°C).Temperature
September's onset corresponds with a subtle shift in the average high-temperature, slightly moving from a warm 73.9°F (23.3°C) in August to a comfortable 66.6°F (19.2°C). September nights are characterized by a notable drop from daytime highs, with an average low-temperature of 39.2°F (4°C).Humidity
In September, the average relative humidity is 52%.Rainfall
In Clark, Colorado, in September, it is raining for 8.2 days, with typically 0.94" (24mm) of accumulated precipitation. In Clark, during the entire year, the rain falls for 96.7 days and collects up to 19.76" (502mm) of precipitation.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 1.1 snowfall days, it receives 0.55" (14mm) of snow. Throughout the year, there are 127.2 snowfall days, and 113.35" (2879mm) of snow is accumulated.Daylight
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 Clark, the average sunshine in September is 11h.UV index
The average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 3 during September leads to these advisories:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Stay sun-safe with clothing that is both closely woven and worn loosely. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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 24min
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).
