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's arrival aligns with a minor decrease in average high-temperatures, from August's 84.6°F (29.2°C) to a still moderately hot 77.5°F (25.3°C). Swallows observes a noteworthy temperature drop from the daily highs during September nights, with a mean temperature of 55.6°F (13.1°C).Humidity
The average relative humidity in September in Swallows is 44%.Rainfall
In Swallows, in September, during 11.4 rainfall days, 1.1" (28mm) of precipitation is typically accumulated. In Swallows, during the entire year, the rain falls for 120.5 days and collects up to 14.92" (379mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:29 am and sunset at 7:28 pm. On the last day of September, sunrise is at 6:55 am and sunset at 6:43 pm MDT.
Sunshine
The average sunshine in September in Swallows is 11h.UV index
The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: The UV index of 5 in September translates into these instructions:
Prioritize safety - Recommendations to avert sunburn are shared. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Frequently asked questions
What is the average September temperature in Swallows?
What is the average humidity in September in Swallows?
How much does it rain in Swallows in September?
When it does not snow in Swallows?
Does it snow in Swallows in September?
How many hours of daylight does Swallows have in September?
When is the sunrise / sunset in September in Swallows?
How long on average sun shines in September in Swallows?
How high is the UV index in September in Swallows?
Average temperature in September
Swallows, CO
- Average high temperature in September: 77.5°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is December (41.5°F).
- Average low temperature in September: 55.6°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is December (23°F).
Average pressure in September
Swallows, CO
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is April (29.89"Hg).
Average wind speed in September
Swallows, CO
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in September
Swallows, CO
- Average humidity in September: 44%
The month with the highest relative humidity is February (62%).
The month with the lowest relative humidity is June (38%).
Average rainfall in September
Swallows, CO
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is July (2.76").
The driest month (with the least rainfall) is November (0.43").
Average rainfall days in September
Swallows, CO
- Average rainfall days in September: 11.4 days
The month with the highest number of rainy days is July (20.4 days).
The month with the least rainy days is November (3.9 days).
Average snowfall in September
Swallows, CO
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.06").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Swallows, CO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (7.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Swallows, CO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 11h and 0min
The month with the most sunshine is June (Average sunshine: 12h and 0min).
The month with the least sunshine is February (Average sunshine: 6h and 48min).
Average sunshine days in September
Swallows, CO
- Average sunshine days in September: 13 days
The month with the most sunshine days is November (23.8 days).
The month with the least sunshine days is July (5.1 days).
Average UV index in September
Swallows, 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
Swallows, CO
- Average cloud cover in September: 14
The months with the most cloud cover are February and April (Cloud cover 23).
The months with the least cloud cover are June and September (Cloud cover 14).
Average visibility in September
Swallows, 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).
Swallows, Colorado, USA
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