September weather forecastWinooski, VT
September
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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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: 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: 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: 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: 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: 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: 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: 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: 12h and 30min
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 54min
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: 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: 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: 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: 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).
