September weather forecastLyndon, VT
September
Weather in September
September in Lyndon marks the transition from summer to fall, bringing along a noticeable change in temperature. The cooling trend continues, significantly departing from August’s highest temperature of 67.1°F (19.5°C). The shorter daylight hours and fewer sunshine hours signal the end of summer. The city shifts slowly from its summer slumber as the wind carries the first indicants of fall. The humidity decreases slightly, adding to the freshness of the approaching fall season.Temperature
During the shift to September, a minor reduction in average high-temperature is observed, shifting from a warm 74.7°F (23.7°C) in August to an enjoyable 67.1°F (19.5°C). Lyndon cools down to an average low-temperature of 46.6°F (8.1°C) throughout the month of September.Humidity
In Lyndon, the average relative humidity in September is 80%.Rainfall
August and September are months with the least rain in Lyndon when the rain falls for 12.7 days and typically aggregates up to 2.13" (54mm) of rain.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 31min.On the first day of the month, sunrise is at 6:11 am and sunset at 7:24 pm. On the last day of September, sunrise is at 6:45 am and sunset at 6:29 pm EDT.
Sunshine
In September, the average sunshine is 8.3h.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 unprotected exposure to Sun's UV rays for the average person.Note: A maximum daily UV index of 3 during September morphs into the following directions:
Act with care - Obligation to protect against skin and eye damage is highlighted. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Lyndon, VT
- Average high temperature in September: 67.1°F
The warmest month (with the highest average high temperature) is July (76.5°F).
The month with the lowest average high temperature is January (22.5°F).
- Average low temperature in September: 46.6°F
The month with the highest average low temperature is July (54.3°F).
The coldest month (with the lowest average low temperature) is January (9.1°F).
Average pressure in September
Lyndon, VT
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Lyndon, VT
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is April (6.9mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Lyndon, VT
- Average humidity in September: 80%
The months with the highest relative humidity are January and February (90%).
The month with the lowest relative humidity is May (76%).
Average rainfall in September
Lyndon, VT
- Average rainfall in September: 2.13"
The wettest month (with the highest rainfall) is October (2.99").
The driest months (with the least rainfall) are August and September (2.13").
Average rainfall days in September
Lyndon, VT
- Average rainfall days in September: 12.7 days
The month with the highest number of rainy days is July (19.1 days).
The month with the least rainy days is January (6.1 days).
Average snowfall in September
Lyndon, VT
- Average snowfall in September: 0"
The month with the highest snowfall is February (13.86").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Lyndon, VT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (22.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Lyndon, 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 18min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 2h and 36min).
Average sunshine days in September
Lyndon, VT
- Average sunshine days in September: 15.4 days
The month with the most sunshine days is September (15.4 days).
The month with the least sunshine days is February (5 days).
Average UV index in September
Lyndon, 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 and December (UV index 1).
Average cloud cover in September
Lyndon, VT
- Average cloud cover in September: 40
The month with the most cloud cover is February (Cloud cover 75).
The month with the least cloud cover is August (Cloud cover 39).
Average visibility in September
Lyndon, 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).
