September weather forecast
Winooski, VT

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Weather in September

September in Winooski heralds the arrival of fall with marginally cooler temperatures and shorter daylight hours. The cityscape gradually takes on hues of amber and red as leaves begin to change color. As the temperature drops to an average high of 69.1°F (20.6°C), residents start to pull out their comfy sweaters and warm beverages. Nature trails, adorned in fall colors, become popular walking spots, portraying the city's seamless blend with mother nature. With October in sight, preparations for a shrouded winter begin to take shape in Winooski's citizens' minds.

Temperature

Transition into September subtly marks a drop in the average high-temperature, moderately moving from a warm 76.6°F (24.8°C) in August to an agreeable 69.1°F (20.6°C). Winooski experiences a mean low-temperature of 49.3°F (9.6°C) during September.

Humidity

The average relative humidity in September is 78%.

Rainfall

In Winooski, in September, during 11.3 rainfall days, 1.18" (30mm) of precipitation is typically accumulated. Throughout the year, in Winooski, there are 153.4 rainfall days, and 17.01" (432mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Winooski.

Daylight

In Winooski, Vermont, the average length of the day in September is 12h and 30min.
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 Winooski, the average sunshine in September is 8.9h.

UV index

The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.
Note: The daily high UV index of 3 during September translates into the following recommendations:
Adopt protective measures - It is advised to guard against sun damage. Around midday, solar radiation is most harmful; hence, exposure should be limited. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.

Frequently asked questions

What is the usual temperature for Winooski in September?

In Winooski, 69.1°F (20.6°C) is the average high-temperature and 49.3°F (9.6°C) is the average low-temperature during September.

What is the average humidity in September in Winooski?

In September, the average relative humidity is 78%.

How many days does it rain in September in Winooski?

In Winooski, in September, it is raining for 11.3 days, with typically 1.18" (30mm) of accumulated precipitation.

When it does not snow in Winooski?

June through September are months without snowfall in Winooski.

Does it snow in Winooski in September?

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

What is the average length of the day in September in Winooski?

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

What time are sunrise and sunset in September in Winooski?

In September, on the first day of the month, sunrise is at 6:16 am and sunset at 7:28 pm. On the last day of the month, in Winooski, sunrise is at 6:50 am and sunset at 6:34 pm EDT.

How many hours of sunshine does Winooski have in September?

In Winooski, the average sunshine duration in September is 8.9h.

How high is the UV index in September in Winooski?

In Winooski, Vermont, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium hazard to health 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
Winooski, VT

Average temperature in September - Winooski, 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
Winooski, VT

Average pressure in September - Winooski, 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
Winooski, VT

Average wind speed in September - Winooski, 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
Winooski, VT

Average humidity in September - Winooski, 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
Winooski, VT

Average rainfall in September - Winooski, 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
Winooski, VT

Average rainfall days in September - Winooski, 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
Winooski, VT

Average snowfall in September - Winooski, 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
Winooski, VT

Average snowfall days in September - Winooski, 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
Winooski, VT

Average daylight in September / Average sunshine in September - Winooski, 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
Winooski, VT

Average sunshine days in September - Winooski, 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
Winooski, VT

Average UV index in September - Winooski, 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
Winooski, VT

Average cloud cover in September - Winooski, 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
Winooski, VT

Average visibility in September - Winooski, 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).

Winooski, Vermont, USA

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