September weather forecast
Chelsea, VT

Share

Weather in September

The first month of the autumn, September, is still a comfortable month in Chelsea, Vermont, with temperature in the range of an average high of 67.6°F (19.8°C) and an average low of 48°F (8.9°C).

Temperature

With the onset of September, Chelsea's climate undergoes a slight change as the average high-temperature moves from a moderately hot 74.8°F (23.8°C) in August to a refreshing 67.6°F (19.8°C). In September, Chelsea reports a consistent average low-temperature of 48°F (8.9°C) during the nights.

Humidity

The average relative humidity in September is 81%.

Rainfall

September is the month with the least rainfall. Rain falls for 13.1 days and accumulates 2.09" (53mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

In September, the average length of the day in Chelsea is 12h and 30min.
On the first day of the month, sunrise is at 6:13 am and sunset at 7:25 pm. On the last day of September, in Chelsea, sunrise is at 6:47 am and sunset at 6:31 pm EDT.

Sunshine

In Chelsea, the average sunshine in September is 8h.

UV index

In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: An average maximum UV index of 3 in September leads to these recommendations:
Heed the precautions - It is counselled to guard against solar damage. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Updated: Jul 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in September?

An average high-temperature, in September, in Chelsea, is 67.6°F (19.8°C) and the average low-temperature is 48°F (8.9°C).

What is the average humidity in September?

In Chelsea, the average relative humidity in September is 81%.

What is the driest month in Chelsea?

The month with the least rainfall is September, when the rain falls for 13.1 days and typically collects 2.09" (53mm) of precipitation.

How many days does it rain in September?

In Chelsea, during September, the rain falls for 13.1 days and regularly aggregates up to 2.09" (53mm) of precipitation.

When it does not snow?

In Chelsea, snow does not fall in June through September.

Does it snow in September?

In Chelsea, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September?

The average day length in September is 12h and 30min.

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 6:13 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 6:31 pm EDT.

How many hours of sunshine does Chelsea have in September?

In Chelsea, the average sunshine duration in September is 8h.

How high is the UV index in September?

The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Chelsea, VT

Average temperature in September - Chelsea, VT
  • Average high temperature in September: 67.6°F

The warmest month (with the highest average high temperature) is July (76.8°F).
The month with the lowest average high temperature is January (23.2°F).

  • Average low temperature in September: 48°F

The month with the highest average low temperature is July (55.2°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).

Average pressure in September
Chelsea, VT

Average pressure in September - Chelsea, 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
Chelsea, VT

Average wind speed in September - Chelsea, VT
  • Average wind speed in September: 5.3mph

The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (5mph).

Average humidity in September
Chelsea, VT

Average humidity in September - Chelsea, VT
  • Average humidity in September: 81%

The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is May (76%).

Average rainfall in September
Chelsea, VT

Average rainfall in September - Chelsea, VT
  • Average rainfall in September: 2.09"

The wettest month (with the highest rainfall) is June (3.43").
The driest month (with the least rainfall) is September (2.09").

Average rainfall days in September
Chelsea, VT

Average rainfall days in September - Chelsea, VT
  • Average rainfall days in September: 13.1 days

The month with the highest number of rainy days is June (18.8 days).
The month with the least rainy days is January (6.8 days).

Average snowfall in September
Chelsea, VT

Average snowfall in September - Chelsea, VT
  • Average snowfall in September: 0"

The month with the highest snowfall is February (13.31").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Chelsea, VT

Average snowfall days in September - Chelsea, VT
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (22.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Chelsea, VT

Average daylight in September / Average sunshine in September - Chelsea, VT
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in September: 8h and 0min

The month with the most sunshine is July (Average sunshine: 9h and 48min).
The months with the least sunshine are January and February (Average sunshine: 2h and 42min).

Average sunshine days in September
Chelsea, VT

Average sunshine days in September - Chelsea, VT
  • Average sunshine days in September: 14.6 days

The month with the most sunshine days is September (14.6 days).
The month with the least sunshine days is February (5.5 days).

Average UV index in September
Chelsea, VT

Average UV index in September - Chelsea, VT
  • Average UV index in September: 3

The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).

Average cloud cover in September
Chelsea, VT

Average cloud cover in September - Chelsea, VT
  • Average cloud cover in September: 43

The months with the most cloud cover are January and February (Cloud cover 74).
The month with the least cloud cover is July (Cloud cover 39).

Average visibility in September
Chelsea, VT

Average visibility in September - Chelsea, VT
  • Average visibility in September: 5mi

The months with the highest visibility are April, May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February, March and December (4mi).

Chelsea, Vermont, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location