September weather forecastLas Mesitas, CO
September
Weather in September
The first month of the autumn, September, is still a comfortable month in Las Mesitas, Colorado, with an average temperature varying between 65.7°F (18.7°C) and 40.6°F (4.8°C).Temperature
Las Mesitas's September weather shows a modest shift in high-temperatures, falling from August's pleasant 71.1°F (21.7°C) to an enjoyable 65.7°F (18.7°C). Throughout September, Las Mesitas notes a dramatic plunge from the daily high to an average low-temperature of 40.6°F (4.8°C).Humidity
In Las Mesitas, the average relative humidity in September is 59%.Rainfall
In Las Mesitas, during September, the rain falls for 12.7 days and regularly aggregates up to 1.65" (42mm) of precipitation. Throughout the year, in Las Mesitas, there are 109 rainfall days, and 22.8" (579mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows in Las Mesitas. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. In Las Mesitas, Colorado, during the entire year, snow falls for 87.5 days and aggregates up to 75.04" (1906mm) of snow.Daylight
In Las Mesitas, the average length of the day in September is 12h and 24min.On the first day of September in Las Mesitas, sunrise is at 6:35 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:48 pm MDT.
Sunshine
In September, the average sunshine is 11h.UV index
In September, the average daily maximum UV index in Las Mesitas, Colorado, is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: In September, the maximum UV index of 3 transforms into these recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Las Mesitas, CO
- Average high temperature in September: 65.7°F
The warmest month (with the highest average high temperature) is July (73.8°F).
The month with the lowest average high temperature is January (28.9°F).
- Average low temperature in September: 40.6°F
The month with the highest average low temperature is July (46.8°F).
The coldest month (with the lowest average low temperature) is January (9°F).
Average pressure in September
Las Mesitas, CO
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is April (29.91"Hg).
Average wind speed in September
Las Mesitas, CO
- Average wind speed in September: 5mph
The windiest months (with the highest average wind speed) are April and May (7.3mph).
The calmest months (with the lowest average wind speed) are January, July and August (4.7mph).
Average humidity in September
Las Mesitas, CO
- Average humidity in September: 59%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is June (42%).
Average rainfall in September
Las Mesitas, CO
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is July (4.21").
The driest month (with the least rainfall) is June (1.22").
Average rainfall days in September
Las Mesitas, CO
- Average rainfall days in September: 12.7 days
The month with the highest number of rainy days is July (20 days).
The month with the least rainy days is November (2.1 days).
Average snowfall in September
Las Mesitas, CO
- Average snowfall in September: 0.04"
The month with the highest snowfall is March (14.02").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Las Mesitas, CO
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (15.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Las Mesitas, CO
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 11h and 0min
The month with the most sunshine is June (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 30min).
Average sunshine days in September
Las Mesitas, CO
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is July (9.3 days).
Average UV index in September
Las Mesitas, CO
- Average UV index in September: 3
The month with the highest UV index is June (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in September
Las Mesitas, CO
- Average cloud cover in September: 17
The month with the most cloud cover is January (Cloud cover 45).
The month with the least cloud cover is June (Cloud cover 13).
Average visibility in September
Las Mesitas, CO
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).
