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
Colchester's progression into September involves a minor drop in the average high-temperature, slightly receding from a moderately hot 76.6°F (24.8°C) in August to a pleasant 69.1°F (20.6°C). Colchester usually reports an average low-temperature of 49.3°F (9.6°C) during the month of September.Humidity
In September, the average relative humidity is 78%.Rainfall
In Colchester, in September, it is raining for 11.3 days, with typically 1.18" (30mm) of accumulated precipitation. In Colchester, during the entire year, the rain falls for 153.4 days and collects up to 17.01" (432mm) of precipitation.Snowfall
In Colchester, Vermont, snow does not fall in June through September.Daylight
The average length of the day in September in Colchester is 12h and 31min.On the first day of the month, sunrise is at 6:16 am and sunset at 7:28 pm. On the last day of September, sunrise is at 6:50 am and sunset at 6:34 pm EDT.
Sunshine
In September, the average sunshine is 8.9h.UV index
In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: A daily high UV index of 3 in September leads to these guidelines:
Be vigilant - A duty to shield skin and eyes from injury exists. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
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 are sunrise and sunset in September?
How many hours of sunshine does Colchester have in September?
How high is the UV index in September?
Average temperature in September
Colchester, VT
- Average high temperature in September: 69.1°F
The warmest month (with the highest average high temperature) is July (78.1°F).
The month with the lowest average high temperature is January (24.6°F).
- Average low temperature in September: 49.3°F
The month with the highest average low temperature is July (57.6°F).
The coldest month (with the lowest average low temperature) is January (12.4°F).
Average pressure in September
Colchester, VT
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Colchester, VT
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in September
Colchester, VT
- Average humidity in September: 78%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is May (75%).
Average rainfall in September
Colchester, VT
- Average rainfall in September: 1.18"
The wettest month (with the highest rainfall) is June (2.09").
The driest month (with the least rainfall) is February (0.87").
Average rainfall days in September
Colchester, VT
- Average rainfall days in September: 11.3 days
The month with the highest number of rainy days is June (17.3 days).
The month with the least rainy days is January (7.4 days).
Average snowfall in September
Colchester, VT
- Average snowfall in September: 0"
The month with the highest snowfall is January (5.16").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Colchester, VT
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (19.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Colchester, VT
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The months with the least sunshine are January and February (Average sunshine: 3h and 0min).
Average sunshine days in September
Colchester, VT
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is September (16.4 days).
The month with the least sunshine days is February (7.3 days).
Average UV index in September
Colchester, VT
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Colchester, VT
- Average cloud cover in September: 35
The month with the most cloud cover is February (Cloud cover 70).
The months with the least cloud cover are July, August and September (Cloud cover 35).
Average visibility in September
Colchester, VT
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January and February (4mi).
Colchester, Vermont, USA
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