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
The transition into September is accompanied by a slight temperature decrease, with the average high-temperature shifting from a tropical 88.2°F (31.2°C) in August to a moderately hot 80.1°F (26.7°C). The significant decline in Erie's temperature, from day to night, averages of 53.4°F (11.9°C) in September.Humidity
In Erie, the average relative humidity in September is 41%.Rainfall
In Erie, in September, it is raining for 7.5 days, with typically 0.55" (14mm) of accumulated precipitation. Throughout the year, there are 87 rainfall days, and 9.88" (251mm) of precipitation is accumulated.Snowfall
In Erie, Colorado, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:28 am and sunset at 7:31 pm. On the last day of September, sunrise is at 6:56 am and sunset at 6:43 pm MDT.
Sunshine
The average sunshine in September is 10.9h.UV index
In Erie, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 4 during September leads to these instructions:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Erie have in September?
What is the UV index intensity in September?
Average temperature in September
Erie, CO
- Average high temperature in September: 80.1°F
The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is December (40.8°F).
- Average low temperature in September: 53.4°F
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is December (21°F).
Average pressure in September
Erie, CO
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Erie, CO
- Average wind speed in September: 5.9mph
The windiest month (with the highest average wind speed) is April (7mph).
The calmest month (with the lowest average wind speed) is December (5.7mph).
Average humidity in September
Erie, CO
- Average humidity in September: 41%
The month with the highest relative humidity is February (64%).
The month with the lowest relative humidity is August (40%).
Average rainfall in September
Erie, CO
- Average rainfall in September: 0.55"
The wettest month (with the highest rainfall) is May (1.69").
The driest months (with the least rainfall) are January and December (0.35").
Average rainfall days in September
Erie, CO
- Average rainfall days in September: 7.5 days
The months with the highest number of rainy days are May and July (12.3 days).
The months with the least rainy days are January and December (3 days).
Average snowfall in September
Erie, CO
- Average snowfall in September: 0"
The month with the highest snowfall is April (4.45").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Erie, CO
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (7.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Erie, CO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 10h and 5min
The months with the most sunshine are June and July (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 42min).
Average sunshine days in September
Erie, CO
- Average sunshine days in September: 18.5 days
The month with the most sunshine days is December (24.5 days).
The month with the least sunshine days is July (12.8 days).
Average UV index in September
Erie, CO
- Average UV index in September: 4
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
Erie, CO
- Average cloud cover in September: 15
The month with the most cloud cover is April (Cloud cover 27).
The month with the least cloud cover is September (Cloud cover 15).
Average visibility in September
Erie, 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).
Erie, Colorado, USA
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