September weather forecastMatheson, CO
September
Weather in September
September, the first month of the autumn in Matheson, is still a warm month, with temperature in the range of an average high of 76.8°F (24.9°C) and an average low of 55.8°F (13.2°C).Temperature
The arrival of September corresponds with a minor reduction in the average high-temperature, down from August's 84°F (28.9°C) to a still moderately hot 76.8°F (24.9°C). In Matheson, an average nighttime temperature of 55.8°F (13.2°C) is expected during September.Humidity
June and September, with an average relative humidity of 46%, are the least humid months in Matheson.Rainfall
In Matheson, during September, the rain falls for 8.2 days and regularly aggregates up to 0.55" (14mm) of precipitation. Throughout the year, there are 83.6 rainfall days, and 9.41" (239mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall in Matheson, Colorado. September is the first month it typically snows in Matheson. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. In Matheson, during the entire year, snow falls for 26.7 days and aggregates up to 9.02" (229mm) of snow.Daylight
In Matheson, the average length of the day in September is 12h and 26min.On the first day of September in Matheson, sunrise is at 6:25 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:39 pm MDT.
Sunshine
The average sunshine in September is 10.6h.UV index
In September, the average daily maximum UV index in Matheson, Colorado, is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum daily UV index of 5 during September morphs into the following directions:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Matheson, CO
- Average high temperature in September: 76.8°F
The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is December (39°F).
- Average low temperature in September: 55.8°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is December (22.3°F).
Average pressure in September
Matheson, CO
- Average pressure in September: 29.95"Hg
The months with the highest atmospheric pressure are January and December (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Matheson, CO
- Average wind speed in September: 9.7mph
The windiest month (with the highest average wind speed) is April (12.2mph).
The calmest month (with the lowest average wind speed) is August (9.3mph).
Average humidity in September
Matheson, CO
- Average humidity in September: 46%
The month with the highest relative humidity is February (63%).
The months with the lowest relative humidity are June and September (46%).
Average rainfall in September
Matheson, CO
- Average rainfall in September: 0.55"
The wettest month (with the highest rainfall) is May (1.77").
The driest month (with the least rainfall) is December (0.2").
Average rainfall days in September
Matheson, CO
- Average rainfall days in September: 8.2 days
The month with the highest number of rainy days is July (14.3 days).
The month with the least rainy days is November (1.7 days).
Average snowfall in September
Matheson, CO
- Average snowfall in September: 0.04"
The month with the highest snowfall is February (1.93").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Matheson, CO
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (6.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Matheson, 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 36min
The months with the most sunshine are June, July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 36min).
Average sunshine days in September
Matheson, CO
- Average sunshine days in September: 18.4 days
The month with the most sunshine days is December (24.9 days).
The month with the least sunshine days is July (13.4 days).
Average UV index in September
Matheson, CO
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Matheson, CO
- Average cloud cover in September: 16
The months with the most cloud cover are February and April (Cloud cover 27).
The months with the least cloud cover are June and September (Cloud cover 16).
Average visibility in September
Matheson, 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).
