September weather forecastSouth Burlington, VT
September
Weather in September
As summer fades and autumn ushers in, South Burlington's weather in September takes a slight turn for the cooler. The high temperature dwindles, oscillating between 49.3°F (9.6°C) and 69.1°F (20.6°C). The town witnesses a drop in daylight hours, retreated to a more manageable 12.5 hours. Despite the decline in temperature, the prevalence of sunshine remains high, with 8.9 hours recorded. South Burlington commences autumn with a crisp touch of coolness and slightly less humidity.Temperature
The arrival of September signals a subtle shift in temperature, down from a warm 76.6°F (24.8°C) in August to an agreeable 69.1°F (20.6°C). South Burlington experiences an average low-temperature of 49.3°F (9.6°C) in the month of September.Humidity
In South Burlington, the average relative humidity in September is 78%.Rainfall
In September, the rain falls for 11.3 days. Throughout September, 1.18" (30mm) of precipitation is accumulated. Throughout the year, there are 153.4 rainfall days, and 17.01" (432mm) of precipitation is accumulated.Snowfall
In South Burlington, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 30min.On the first day of September, sunrise is at 6:16 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:34 pm EDT.
Sunshine
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 medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: An average UV index of 3 in September transforms into this advice:
Undertake protective steps - Preventing sun damage is advised. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
South Burlington, 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
South Burlington, 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
South Burlington, 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
South Burlington, 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
South Burlington, 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
South Burlington, 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
South Burlington, 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
South Burlington, 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
South Burlington, 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
South Burlington, 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
South Burlington, 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
South Burlington, 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
South Burlington, 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).
