September weather forecast
Cortez, CO

Share
The bright and red rays of the setting sun over the scenic layout of hills and plains of Cortez, Colorado
The bright and red rays of the setting sun over the scenic layout of hills and plains of Cortez, Colorado

Weather in September

In September, the weather in Cortez starts transitioning towards fall, with a gradual drop in temperatures. The arrival of fall paints a beautiful canvas with trees changing colours and the landscape transforming into a picturesque spectacle. September allows for an assortment of activities ranging from scenic drives to hiking, owing to its clement weather conditions.

Temperature

Transitioning from August to September involves a subtle drop in average high-temperatures, descending from a warm 82°F to a still moderately hot 75°F. Cortez observes an average nighttime low-temperature of 54.1°F during the month of September.

Humidity

The average relative humidity in September is 40%.

Rainfall

In September, in Cortez, the rain falls for 6.3 days. Throughout September, 0.47" of precipitation is accumulated. Throughout the year, there are 78.9 rainfall days, and 9.84" of precipitation is accumulated.

Snowfall

In Cortez, Colorado, snow does not fall in May through September.

Daylight

In Cortez, the average length of the day in September is 12h and 25min.
On the first day of the month, sunrise is at 6:44 am and sunset at 7:43 pm. On the last day of September, sunrise is at 7:08 am and sunset at 6:59 pm MDT.

Sunshine

In September, the average sunshine in Cortez is 10.9h.

UV index

The average daily maximum UV index in September in Cortez is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.
Note: In September, a daily maximum UV index of 5 leads to the following instructions:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
[Resources]

FAQ

What is the temperature in September in Cortez?

September temperatures in Cortez, Colorado, vary between a high-temperature of 75°F and a low-temperature of 54.1°F. The average heat index (a.k.a. 'feels like', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in August is appraised at 80.6°F.

What is the average humidity in September in Cortez?

In Cortez, Colorado, the average relative humidity in September is 40%.

How much does it rain in Cortez in September?

In September, in Cortez, the rain falls for 6.3 days. Throughout September, 0.47" of precipitation is accumulated.

When it does not snow in Cortez?

In Cortez, snow does not fall in May through September.

Does it snow in Cortez in September?

In Cortez, Colorado, in September, it doesn't snow. In October, it regularly snows.

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

In September, the average day length in Cortez, Colorado, is 12h and 25min.

When is the sunrise / sunset in September in Cortez?

In September, on the first day of the month, sunrise is at 6:44 am and sunset at 7:43 pm. On the last day of the month, in Cortez, Colorado, sunrise is at 7:08 am and sunset at 6:59 pm MDT.

How long on average sun shines in September in Cortez?

In Cortez, the average sunshine duration in September is 10.9h.

What is the UV index intensity in September in Cortez?

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to UV radiation.
Average high temperature
Average low temperature
Average pressure
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Cortez, CO

Average temperature in September - Cortez, CO
  • Average high temperature in September: 75°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 (35.1°F).

  • Average low temperature in September: 54.1°F

The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

[Resources]

Average pressure in September
Cortez, CO

Average pressure in September - Cortez, CO
  • Average pressure in September: 29.98"Hg

The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

[Resources]

Average wind speed in September
Cortez, CO

Average wind speed in September - Cortez, CO
  • Average wind speed in September: 6.9mph

The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest month (with the lowest average wind speed) is January (5.7mph).

[Resources]

Average humidity in September
Cortez, CO

Average humidity in September - Cortez, CO
  • Average humidity in September: 40%

The month with the highest relative humidity is January (73%).
The month with the lowest relative humidity is June (26%).

[Resources]

Average rainfall in September
Cortez, CO

Average rainfall in September - Cortez, CO
  • Average rainfall in September: 0.47"

The wettest months (with the highest rainfall) are January and December (1.26").
The driest month (with the least rainfall) is June (0.2").

[Resources]

Average rainfall days in September
Cortez, CO

Average rainfall days in September - Cortez, CO
  • Average rainfall days in September: 6.3 days

The month with the highest number of rainy days is July (9.6 days).
The month with the least rainy days is June (2.8 days).

[Resources]

Average snowfall in September
Cortez, CO

Average snowfall in September - Cortez, CO
  • Average snowfall in September: 0"

The month with the highest snowfall is January (8.11").
The months with the least snowfall are May, June, July, August and September (0").

[Resources]

Average snowfall days in September
Cortez, CO

Average snowfall days in September - Cortez, CO
  • Average snowfall days in September: 0 days

The months with the highest number of snowfall days are January and December (8.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

[Resources]

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

Average daylight in September / Average sunshine in September - Cortez, CO
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in September: 10h and 5min

The month with the most sunshine is June (Average sunshine: 12h and 6min).
The months with the least sunshine are January and December (Average sunshine: 6h and 30min).

[Resources]

Average sunshine days in September
Cortez, CO

Average sunshine days in September - Cortez, CO
  • Average sunshine days in September: 21.9 days

The month with the most sunshine days is June (26.2 days).
The month with the least sunshine days is February (17.6 days).

[Resources]

Average UV index in September
Cortez, CO

Average UV index in September - Cortez, 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).

[Resources]

Average cloud cover in September
Cortez, CO

Average cloud cover in September - Cortez, CO
  • Average cloud cover in September: 10

The months with the most cloud cover are January and December (Cloud cover 27).
The month with the least cloud cover is June (Cloud cover 9).

[Resources]

Average visibility in September
Cortez, CO

Average visibility in September - Cortez, 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).

[Resources]

Cortez, Colorado, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location