September weather forecastMarble, CO
September
Weather in September
September, the first month of the autumn in Marble, is still a comfortable month, with an average temperature varying between 61.7°F (16.5°C) and 35.1°F (1.7°C).Temperature
September signals a slight drop in average high-temperature, sliding from August's agreeable 68°F (20°C) to a comfortable 61.7°F (16.5°C). Marble experiences a drastic reduction from day temperatures to an average low of 35.1°F (1.7°C) in September.Humidity
In September, the average relative humidity is 59%.Rainfall
In September, the rain falls for 11.5 days. Throughout September, 1.14" (29mm) of precipitation is accumulated. Throughout the year, there are 121.7 rainfall days, and 17.01" (432mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through December. In Marble, during September, snow falls for 3.5 days and regularly aggregates up to 0.94" (24mm) of snow. In Marble, during the entire year, snow falls for 140.5 days and aggregates up to 73.74" (1873mm) of snow.Daylight
The average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:38 am and sunset at 7:38 pm. On the last day of September, sunrise is at 7:04 am and sunset at 6:52 pm MDT.
Sunshine
The average sunshine in September is 10.9h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: An average maximum UV index of 3 in September leads to these recommendations:
Guard yourself - An obligation to protect skin and eyes from harm exists. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Marble, CO
- Average high temperature in September: 61.7°F
The warmest month (with the highest average high temperature) is July (70.3°F).
The month with the lowest average high temperature is December (24.6°F).
- Average low temperature in September: 35.1°F
The month with the highest average low temperature is July (41.7°F).
The coldest month (with the lowest average low temperature) is January (2.5°F).
Average pressure in September
Marble, CO
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is May (29.94"Hg).
Average wind speed in September
Marble, CO
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is June (6.2mph).
The calmest month (with the lowest average wind speed) is January (4.3mph).
Average humidity in September
Marble, CO
- Average humidity in September: 59%
The month with the highest relative humidity is February (90%).
The month with the lowest relative humidity is June (51%).
Average rainfall in September
Marble, CO
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is July (2.6").
The driest month (with the least rainfall) is November (0.79").
Average rainfall days in September
Marble, CO
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is July (20.8 days).
The month with the least rainy days is November (4.5 days).
Average snowfall in September
Marble, CO
- Average snowfall in September: 0.94"
The month with the highest snowfall is March (12.6").
The month with the least snowfall is July (0.04").
Average snowfall days in September
Marble, CO
- Average snowfall days in September: 3.5 days
The month with the highest number of snowfall days is February (20.3 days).
The month with the least snowfall days is July (0.3 days).
Average daylight in September /
Average sunshine in September
Marble, 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 54min
The month with the most sunshine is June (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 18min).
Average sunshine days in September
Marble, CO
- Average sunshine days in September: 12 days
The month with the most sunshine days is November (17 days).
The month with the least sunshine days is July (6.8 days).
Average UV index in September
Marble, CO
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 4).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in September
Marble, CO
- Average cloud cover in September: 17
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 16).
Average visibility in September
Marble, CO
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
