September weather forecastCalhan, CO
September
Weather in September
September, the first month of the autumn in Calhan, is also an agreeable month, with an average temperature ranging between max 70.7°F (21.5°C) and min 48.9°F (9.4°C).Temperature
The transition into September subtly indicates a reduction in the average high-temperature, down to a pleasant 70.7°F (21.5°C) from August's moderately hot 76.6°F (24.8°C). In September, the nighttime temperature in Calhan, Colorado, plummets remarkably from the daily apex to a steady average of 48.9°F (9.4°C).Humidity
The average relative humidity in September in Calhan is 51%.Rainfall
In Calhan, in September, it is raining for 11.5 days, with typically 1.22" (31mm) of accumulated precipitation. In Calhan, Colorado, during the entire year, the rain falls for 117.8 days and collects up to 17.44" (443mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows in Calhan. Throughout September, in the average 0.3 snowfall days, it receives 0.08" (2mm) of snow. In Calhan, during the entire year, snow falls for 63.1 days and aggregates up to 34.76" (883mm) of snow.Daylight
In Calhan, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:26 am and sunset at 7:27 pm. On the last day of September, in Calhan, sunrise is at 6:52 am and sunset at 6:40 pm MDT.
Sunshine
The average sunshine in September in Calhan is 10.5h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: In September, a daily UV index of 4 turns into the following recommendations:
Ensure safety - Recommendations to avert sunburn are presented. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Tightly woven clothing, when worn loosely, shields effectively against the Sun. 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
Average temperature in September
Calhan, CO
- Average high temperature in September: 70.7°F
The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is December (36.3°F).
- Average low temperature in September: 48.9°F
The month with the highest average low temperature is July (55.8°F).
The coldest month (with the lowest average low temperature) is December (18.5°F).
Average pressure in September
Calhan, 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 (29.9"Hg).
Average wind speed in September
Calhan, CO
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is August (7.1mph).
Average humidity in September
Calhan, CO
- Average humidity in September: 51%
The month with the highest relative humidity is February (67%).
The month with the lowest relative humidity is June (48%).
Average rainfall in September
Calhan, CO
- Average rainfall in September: 1.22"
The wettest month (with the highest rainfall) is July (3.15").
The driest month (with the least rainfall) is December (0.51").
Average rainfall days in September
Calhan, CO
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is July (18.9 days).
The month with the least rainy days is November (2.7 days).
Average snowfall in September
Calhan, CO
- Average snowfall in September: 0.08"
The month with the highest snowfall is April (6.42").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Calhan, CO
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is February (11.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Calhan, CO
- Average daylight in September: 12h and 24min
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 30min
The month with the most sunshine is June (Average sunshine: 11h and 30min).
The month with the least sunshine is February (Average sunshine: 6h and 24min).
Average sunshine days in September
Calhan, CO
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is November (22 days).
The month with the least sunshine days is July (8.3 days).
Average UV index in September
Calhan, CO
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in September
Calhan, CO
- Average cloud cover in September: 20
The month with the most cloud cover is April (Cloud cover 31).
The months with the least cloud cover are June, October and November (Cloud cover 19).
Average visibility in September
Calhan, 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).
