Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September's onset introduces a mild reduction in the average high-temperature, from a hot 90.1°F (32.3°C) in August to a warm 83.5°F (28.6°C). A significant drop from the day's peak to an average low-temperature of 61.9°F (16.6°C) is noted during the nights in September in Fort Lyon, Colorado.Heat index
September's average heat index is computed to be 82.4°F (28°C). Continued exposure and engagement in activity might trigger tiredness and subsequently heat cramps.For clarity, heat index numbers account for light winds and areas under shade. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
Humidity
In September, the average relative humidity is 43%.Rainfall
In Fort Lyon, during September, the rain falls for 7.8 days and regularly aggregates up to 0.71" (18mm) of precipitation. Throughout the year, there are 89.9 rainfall days, and 10.2" (259mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In Fort Lyon, the average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:22 am and sunset at 7:21 pm. On the last day of September, sunrise is at 6:47 am and sunset at 6:36 pm MDT.
Sunshine
In Fort Lyon, Colorado, the average sunshine in September is 10.6h.UV index
The average daily maximum UV index in September in Fort Lyon is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 5 in September converts into the following recommendations:
Exercise prevention - Warding off sunburn is urged. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Frequently asked questions
How hot does it get in Fort Lyon in September?
What is the average humidity in September in Fort Lyon?
How many days does it rain in September in Fort Lyon?
When it does not snow in Fort Lyon?
Does it snow in Fort Lyon in September?
What is the average length of the day in September in Fort Lyon?
When are sunrise and sunset in September in Fort Lyon?
How many hours of sunshine does Fort Lyon have in September?
What is the UV index reading in September in Fort Lyon?
Average temperature in September
Fort Lyon, CO
- Average high temperature in September: 83.5°F
The warmest month (with the highest average high temperature) is July (92.8°F).
The month with the lowest average high temperature is December (43.7°F).
- Average low temperature in September: 61.9°F
The month with the highest average low temperature is July (70.9°F).
The coldest month (with the lowest average low temperature) is December (26.6°F).
Average pressure in September
Fort Lyon, CO
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.82"Hg).
Average wind speed in September
Fort Lyon, CO
- Average wind speed in September: 10.3mph
The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is January (8.2mph).
Average humidity in September
Fort Lyon, CO
- Average humidity in September: 43%
The month with the highest relative humidity is January (58%).
The month with the lowest relative humidity is June (38%).
Average rainfall in September
Fort Lyon, CO
- Average rainfall in September: 0.71"
The wettest month (with the highest rainfall) is July (1.81").
The driest months (with the least rainfall) are January, November and December (0.35").
Average rainfall days in September
Fort Lyon, CO
- Average rainfall days in September: 7.8 days
The month with the highest number of rainy days is July (13.8 days).
The month with the least rainy days is January (3.3 days).
Average snowfall in September
Fort Lyon, CO
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.17").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Fort Lyon, CO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Fort Lyon, CO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 10h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 42min).
Average sunshine days in September
Fort Lyon, CO
- Average sunshine days in September: 19.9 days
The month with the most sunshine days is November (24.5 days).
The month with the least sunshine days is July (13.2 days).
Average UV index in September
Fort Lyon, CO
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 2).
Average cloud cover in September
Fort Lyon, CO
- Average cloud cover in September: 14
The months with the most cloud cover are February and April (Cloud cover 25).
The months with the least cloud cover are June and September (Cloud cover 14).
Average visibility in September
Fort Lyon, 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).
Fort Lyon, Colorado, USA
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