September weather forecast and climate
Clark, CO

Weather in September

September, the first month of the autumn, in Clark, is also an enjoyable month, with average temperature fluctuating between 66.6°F (19.2°C) and 39.2°F (4°C).

Temperature

In Clark, the average high-temperature marginally drops, from a warm 73.9°F (23.3°C) in August, to a comfortable 66.6°F (19.2°C). In Clark, Colorado, in September, the average low-temperature is 39.2°F (4°C).

Humidity

In September, the average relative humidity 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. 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 12.4h.

Sunshine

In September, the average sunshine is 11h.

UV index

In Clark, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from the exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
[Resources]

FAQ

What is the temperature in September in Clark?

In Clark, Colorado, in September, the average high-temperature is 66.6°F (19.2°C), and the average low-temperature is 39.2°F (4°C).

What is the average humidity in September in Clark?

In September, the average relative humidity is 52%.

How many days does it rain in September in Clark?

In Clark, Colorado, in September, it is raining for 8.2 days, with typically 0.94" (24mm) of accumulated precipitation.

When does it start snowing in Clark?

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.

What is the average length of the day in September in Clark?

In Clark, the average length of the day in September is 12.4h.

How many hours of sunshine does Clark have in September?

In September, the average sunshine in Clark, Colorado, is 11h.

What is the UV index intensity in September in Clark?

In Clark, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate vulnerability from the exposure to the Sun's UV rays.

Average temperature in September
Clark, CO

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).
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).

[Resources]

Average pressure in September
Clark, CO

Average pressure in September - Clark, CO
  • Average pressure in September: 30.01"

The month with the highest atmospheric pressure is January (30.24").
Months with the lowest atmospheric pressure are May and June (29.92").

[Resources]

Average wind speed in September
Clark, CO

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).

[Resources]

Average humidity in September
Clark, CO

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%).

[Resources]

Average rainfall in September
Clark, CO

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").

[Resources]

Average rainfall days in September
Clark, CO

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).

[Resources]

Average snowfall in September
Clark, CO

Average snowfall in September - Clark, CO
  • Average snowfall in September: 0.55"

The month with the highest snowfall is January (17.95").
Months with the least snowfall are July and August (0").

[Resources]

Average snowfall days in September
Clark, CO

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).

[Resources]

Average daylight in September /
Average sunshine in September
Clark, CO

Average daylight in September / Average sunshine in September - Clark, CO
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in September: 11h

Months with the most sunshine are July and August (Average sunshine: 11.8h).
The month with the least sunshine is February (Average sunshine: 4.9h).

[Resources]

Average sunshine days in September
Clark, CO

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).

[Resources]

Average UV index in September
Clark, CO

Average UV index in September - Clark, CO
  • Average UV index in September: 3

Months with the highest UV index are July and August (UV index 5).
Months with the lowest UV index are January, November and December (UV index 1).

[Resources]

Average cloud cover in September
Clark, CO

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).

[Resources]

Average visibility in September
Clark, CO

Average visibility in September - Clark, CO
  • Average visibility in September: 6mi

Months with the highest visibility are May, June, July, August, September and October (6mi).
Months with the lowest visibility are January, February, March and December (4mi).

[Resources]