September weather forecastLeadville, CO
September
Weather in September
Autumn signifies its arrival in Leadville, Colorado, with September's breezy winds and altering foliage. A reduction in temperatures to 58.8°F (14.9°C) from August's 64.8°F (18.2°C) signals the transition towards colder seasons. The weather becomes drier with 1.02" (26mm) of rainfall over 9.1 days, similar to the drier October. As the city turns a corner from balmy summer into the crisp fall, one can expect spectacular views amidst the cooling weather.Temperature
Transitioning from August to September involves a subtle drop in average high-temperatures, descending from 64.8°F (18.2°C) to a still refreshing 58.8°F (14.9°C). Despite a noticeable differential from daytime highs, Leadville notes an average nighttime low-temperature of 34.7°F (1.5°C) in September.Humidity
In Leadville, the average relative humidity in September is 59%.Rainfall
In Leadville, during September, the rain falls for 9.1 days and regularly aggregates up to 1.02" (26mm) of precipitation. In Leadville, during the entire year, the rain falls for 103.1 days and collects up to 19.65" (499mm) of precipitation.Snowfall
Months with snowfall are January through December. In Leadville, Colorado, in September, snow falls for 2.9 days, with typically accumulated 1.02" (26mm) of snow. In Leadville, during the entire year, snow falls for 141.6 days and aggregates up to 104.69" (2659mm) of snow.Daylight
In Leadville, the average length of the day in September is 12h and 26min.On the first day of September in Leadville, sunrise is at 6:34 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:48 pm MDT.
Sunshine
In September, the average sunshine 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 vulnerability from unsafe exposure to UV radiation for average individuals.Note: In September, a regular UV index of 3 translates into these guidelines:
Take precautions - Protection against sunburn is recommended. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Leadville, CO
- Average high temperature in September: 58.8°F
The warmest month (with the highest average high temperature) is July (66.7°F).
The month with the lowest average high temperature is December (23°F).
- Average low temperature in September: 34.7°F
The month with the highest average low temperature is July (40.5°F).
The coldest month (with the lowest average low temperature) is January (1.8°F).
Average pressure in September
Leadville, CO
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is April (29.94"Hg).
Average wind speed in September
Leadville, CO
- Average wind speed in September: 5.1mph
The windiest months (with the highest average wind speed) are February and June (6.5mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).
Average humidity in September
Leadville, CO
- Average humidity in September: 59%
The month with the highest relative humidity is February (88%).
The month with the lowest relative humidity is June (52%).
Average rainfall in September
Leadville, CO
- Average rainfall in September: 1.02"
The wettest month (with the highest rainfall) is May (2.48").
The driest month (with the least rainfall) is November (0.98").
Average rainfall days in September
Leadville, CO
- Average rainfall days in September: 9.1 days
The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is November (2.9 days).
Average snowfall in September
Leadville, CO
- Average snowfall in September: 1.02"
The month with the highest snowfall is March (18.11").
The month with the least snowfall is August (0.28").
Average snowfall days in September
Leadville, CO
- Average snowfall days in September: 2.9 days
The month with the highest number of snowfall days is April (19.9 days).
The months with the least snowfall days are July and August (1 days).
Average daylight in September /
Average sunshine in September
Leadville, 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 42min).
The month with the least sunshine is February (Average sunshine: 5h and 42min).
Average sunshine days in September
Leadville, CO
- Average sunshine days in September: 16.7 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is April (6.8 days).
Average UV index in September
Leadville, CO
- Average UV index in September: 3
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in September
Leadville, CO
- Average cloud cover in September: 19
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is June (Cloud cover 17).
Average visibility in September
Leadville, 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 and December (4mi).
