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 arrival signals a moderate reduction in the average high-temperature, easing from a pleasant 70.2°F (21.2°C) in August to a refreshing 63°F (17.2°C). Throughout September, Avon acknowledges a distinct difference between its daytime highs and the steady low average of 35.1°F (1.7°C).Humidity
In September, the average relative humidity is 55%.Rainfall
September is the month with the least rainfall in Avon. Rain falls for 5.4 days and accumulates 0.43" (11mm) of precipitation.Snowfall
January through June, September through December are months with snowfall in Avon. September is the first month it typically snows. Throughout September, in the average 0.6 snowfall days, it receives 0.24" (6mm) of snow. In Avon, during the entire year, snow falls for 89.3 days and aggregates up to 62.91" (1598mm) of snow.Daylight
In Avon, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:35 am and sunset at 7:36 pm. On the last day of September, in Avon, sunrise is at 7:02 am and sunset at 6:49 pm MDT.
Sunshine
In Avon, the average sunshine in September is 11.1h.UV index
In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the maximum UV index of 3 suggests these recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. Around midday, solar radiation is most harmful; hence, exposure should be limited. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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
What are September temperatures in Avon?
What is the average humidity in September in Avon?
What is the driest month in Avon?
How many days does it rain in September in Avon?
When does it start snowing in Avon?
What is the average length of the day in September in Avon?
When are sunrise and sunset in September in Avon?
How long on average sun shines in September in Avon?
How high is the UV index in September in Avon?
Average temperature in September
Avon, CO
- Average high temperature in September: 63°F
The warmest month (with the highest average high temperature) is July (72.1°F).
The month with the lowest average high temperature is December (24.4°F).
- Average low temperature in September: 35.1°F
The month with the highest average low temperature is July (41.4°F).
The coldest month (with the lowest average low temperature) is January (0.9°F).
Average pressure in September
Avon, CO
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is January (30.22"Hg).
The months with the lowest atmospheric pressure are April and May (29.94"Hg).
Average wind speed in September
Avon, CO
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is June (6.4mph).
The calmest months (with the lowest average wind speed) are January and December (4.8mph).
Average humidity in September
Avon, CO
- Average humidity in September: 55%
The month with the highest relative humidity is February (90%).
The month with the lowest relative humidity is June (51%).
Average rainfall in September
Avon, CO
- Average rainfall in September: 0.43"
The wettest months (with the highest rainfall) are February and March (1.26").
The driest month (with the least rainfall) is September (0.43").
Average rainfall days in September
Avon, CO
- Average rainfall days in September: 5.4 days
The month with the highest number of rainy days is July (11.2 days).
The month with the least rainy days is November (2.1 days).
Average snowfall in September
Avon, CO
- Average snowfall in September: 0.24"
The month with the highest snowfall is February (10.35").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Avon, CO
- Average snowfall days in September: 0.6 days
The month with the highest number of snowfall days is February (15.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Avon, CO
- Average daylight in September: 12h and 2min
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 24min).
- Average sunshine in September: 11h and 1min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 18min).
Average sunshine days in September
Avon, CO
- Average sunshine days in September: 23.2 days
The month with the most sunshine days is October (23.3 days).
The month with the least sunshine days is February (12.4 days).
Average UV index in September
Avon, CO
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 4).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Avon, CO
- Average cloud cover in September: 15
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 14).
Average visibility in September
Avon, CO
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (3mi).
Avon, Colorado, USA
Weather forecast for your location
2. Allow the app to use your location