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
Start of September brings a slight shift in the average high-temperature, dipping a bit from August's warm 84°F (28.9°C) to a still moderately hot 76.8°F (24.9°C). An average low-temperature of 55.8°F (13.2°C) is expected during September.Humidity
The months with the lowest humidity are June and September, with an average relative humidity of 46%.Rainfall
In Flagler, Colorado, during September, the rain falls for 8.2 days and regularly aggregates up to 0.55" (14mm) of precipitation. In Flagler, during the entire year, the rain falls for 83.6 days and collects up to 9.41" (239mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. In Flagler, during the entire year, snow falls for 26.7 days and aggregates up to 9.02" (229mm) of snow.Daylight
The average length of the day in September in Flagler is 12h and 26min.On the first day of September, sunrise is at 6:21 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:35 pm MDT.
Sunshine
The average sunshine in September is 10.6h.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 radiation for the average person.Note: A daily high UV index of 5 in September leads to these guidelines:
Undertake precautions - It is suggested to shield oneself from sunburn. When the Sun is at its strongest around midday, find shade and limit exposure. Stay sun-safe with clothing that is both closely woven and worn loosely. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the least humid month in Flagler?
What is the average humidity in September?
How many days does it rain in September?
When does it start snowing?
How many hours of daylight does Flagler have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Flagler have in September?
What is the UV index intensity in September?
Average temperature in September
Flagler, CO
- Average high temperature in September: 76.8°F
The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is December (39°F).
- Average low temperature in September: 55.8°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is December (22.3°F).
Average pressure in September
Flagler, CO
- Average pressure in September: 29.95"Hg
The months with the highest atmospheric pressure are January and December (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Flagler, CO
- Average wind speed in September: 9.7mph
The windiest month (with the highest average wind speed) is April (12.2mph).
The calmest month (with the lowest average wind speed) is August (9.3mph).
Average humidity in September
Flagler, CO
- Average humidity in September: 46%
The month with the highest relative humidity is February (63%).
The months with the lowest relative humidity are June and September (46%).
Average rainfall in September
Flagler, CO
- Average rainfall in September: 0.55"
The wettest month (with the highest rainfall) is May (1.77").
The driest month (with the least rainfall) is December (0.2").
Average rainfall days in September
Flagler, CO
- Average rainfall days in September: 8.2 days
The month with the highest number of rainy days is July (14.3 days).
The month with the least rainy days is November (1.7 days).
Average snowfall in September
Flagler, CO
- Average snowfall in September: 0.04"
The month with the highest snowfall is February (1.93").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Flagler, CO
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (6.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Flagler, CO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 10h and 4min
The months with the most sunshine are June, July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 36min).
Average sunshine days in September
Flagler, CO
- Average sunshine days in September: 18.4 days
The month with the most sunshine days is December (24.9 days).
The month with the least sunshine days is July (13.4 days).
Average UV index in September
Flagler, 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
Flagler, CO
- Average cloud cover in September: 16
The months with the most cloud cover are February and April (Cloud cover 27).
The months with the least cloud cover are June and September (Cloud cover 16).
Average visibility in September
Flagler, 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).
Flagler, Colorado, USA
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