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
The average high-temperature slightly decreases in September, shifting from a hot 87.8°F (31°C) in August to a warm 80.2°F (26.8°C). Idalia's September nights see a large temperature deviation, with temperatures resting at a low of 58.1°F (14.5°C).Humidity
The months with the lowest humidity are July and September, with an average relative humidity of 49%.Rainfall
In Idalia, in September, during 9 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. In Idalia, during the entire year, the rain falls for 100.9 days and collects up to 14.02" (356mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.08" (2mm) of snow. In Idalia, during the entire year, snow falls for 22.8 days and aggregates up to 10.08" (256mm) of snow.Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 6:18 am and sunset at 7:19 pm. On the last day of September, sunrise is at 6:45 am and sunset at 6:32 pm MDT.
Sunshine
In Idalia, the average sunshine in September is 9.8h.UV index
In Idalia, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: The average daily UV index of 5 in September transforms into the following instructions:
Adopt protective measures - It is advised to guard against sun damage. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Stay sun-safe with clothing that is both closely woven and worn loosely. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the least humid month?
What is the average humidity in September?
How many days does it rain in September in Idalia?
When does it start to snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Idalia have in September?
What is the UV index intensity in September?
Average temperature in September
Idalia, CO
- Average high temperature in September: 80.2°F
The warmest month (with the highest average high temperature) is July (90.3°F).
The month with the lowest average high temperature is December (40.6°F).
- Average low temperature in September: 58.1°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is December (23.9°F).
Average pressure in September
Idalia, CO
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.81"Hg).
Average wind speed in September
Idalia, CO
- Average wind speed in September: 10.3mph
The windiest month (with the highest average wind speed) is April (12.3mph).
The calmest month (with the lowest average wind speed) is August (9.8mph).
Average humidity in September
Idalia, CO
- Average humidity in September: 49%
The months with the highest relative humidity are January, February and December (63%).
The months with the lowest relative humidity are July and September (49%).
Average rainfall in September
Idalia, CO
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is May (2.68").
The driest months (with the least rainfall) are January, February and December (0.28").
Average rainfall days in September
Idalia, CO
- Average rainfall days in September: 9 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is December (1.8 days).
Average snowfall in September
Idalia, CO
- Average snowfall in September: 0.08"
The month with the highest snowfall is October (1.93").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Idalia, CO
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (4.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Idalia, 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 24min).
- Average sunshine in September: 9h and 5min
The months with the most sunshine are June, July and August (Average sunshine: 11h and 24min).
The month with the least sunshine is February (Average sunshine: 6h and 12min).
Average sunshine days in September
Idalia, CO
- Average sunshine days in September: 17.3 days
The month with the most sunshine days is December (26 days).
The month with the least sunshine days is May (11.9 days).
Average UV index in September
Idalia, CO
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Idalia, CO
- Average cloud cover in September: 20
The month with the most cloud cover is February (Cloud cover 34).
The month with the least cloud cover is August (Cloud cover 19).
Average visibility in September
Idalia, 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).
Idalia, Colorado, USA
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