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
September is characterized by a mild reduction in the average high-temperature, from a warm 82°F (27.8°C) in August to a still moderately hot 75°F (23.9°C). Throughout September, Cortez witnesses a consistent average low-temperature of 54.1°F (12.3°C).Humidity
In Cortez, the average relative humidity in September is 40%.Rainfall
In Cortez, in September, it is raining for 6.3 days, with typically 0.47" (12mm) of accumulated precipitation. Throughout the year, there are 78.9 rainfall days, and 9.84" (250mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 6:45 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:58 pm MDT.
Sunshine
In September, the average sunshine is 10.9h.UV index
The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 5 transforms into these recommendations:
Take precautions - Protection against skin and eye damage is obliged. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Cortez in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in Cortez in September?
How many hours of daylight does Cortez have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Cortez have in September?
What is the UV index intensity in September?
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).
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).
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).
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%).
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").
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).
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").
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).
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).
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).
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).
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).
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).
Cortez, Colorado, USA
Weather forecast for your location
2. Allow the app to use your location