September weather forecastBlack Forest, CO
September
Weather in September
September, the first month of the autumn in Black Forest, is still a pleasant month, with an average temperature varying between 48.9°F (9.4°C) and 70.7°F (21.5°C).Temperature
As August transitions into September, Black Forest sees a gentle drop in the average high-temperature, transitioning from a moderately hot 76.6°F (24.8°C) to a pleasant 70.7°F (21.5°C). Black Forest experiences a substantial decline from the daytime high temperatures in September, settling on an average low of 48.9°F (9.4°C).Humidity
In Black Forest, the average relative humidity in September is 51%.Rainfall
In Black Forest, in September, during 11.5 rainfall days, 1.22" (31mm) of precipitation is typically accumulated. Throughout the year, there are 117.8 rainfall days, and 17.44" (443mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.3 snowfall days, it receives 0.08" (2mm) of snow. Throughout the year, there are 63.1 snowfall days, and 34.76" (883mm) of snow is accumulated.Daylight
The average length of the day in September in Black Forest is 12h and 26min.On the first day of the month, sunrise is at 6:28 am and sunset at 7:28 pm. On the last day of September, sunrise is at 6:54 am and sunset at 6:42 pm MDT.
Sunshine
In Black Forest, the average sunshine in September is 10.5h.UV index
In Black Forest, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Black Forest, 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
Black Forest, 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
Black Forest, 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
Black Forest, 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
Black Forest, 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
Black Forest, 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
Black Forest, 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
Black Forest, 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
Black Forest, 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
Black Forest, 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
Black Forest, 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
Black Forest, 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
Black Forest, 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).
