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THE NATIONAL WEATHER SERVICE IN BURLINGTON OFFERS THE FOLLOWING DATA FOR SEPTEMBER AS OF 2000:
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NORMAL
SEPTEMBER
49.9°F to 68.9°F
Average 59.4°F
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WARMEST
SEPTEMBER
Average 66.2°F in 1891
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COLDEST
SEPTEMBER
Average 53.5°F in 1963
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WARMEST
SEPTEMBER DAY
95°F
September 11, 1931
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COLDEST
SEPTEMBER DAY
25°F
September 24, 1963
September 29, 1914
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NORMAL
PRECIPITATION
3.83"
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HIGHEST
PRECIPITATION
10.25 in 1999
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LOWEST
PRECIPITATION
0.68 in 1927
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MOST
PRECIPITATION
3.11”
September 21, 1983
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LEAST
PRECIPITATION
0.95"
September 7, 1898
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AVERAGE
SNOWFALL
TRACE
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MAXIMUM
SNOWFALL
0.1" in 1993
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MINIMUM
SNOWFALL
0.0 in Many
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MOST SNOW
Not Available
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LEAST SNOW
Not Available
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TO CHECK FOR ACCURACY AND UPDATES CLICK HERE
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 THE VERMONT WEATHER BOOK by David Ludlum (Vermont Historical Society, 1996) says of September:
The arrival of the autumnal equinox on or about September 23 marks a significant event on nature’s calendar. In the astronomical realm, it indicates that the direct overhead rays of the sun have crossed the equator in their annual southward migration, resulting in a steadily declining solar input for the Northern Hemisphere. The North Pole has seen the last of direct sunlight, and the pall of darkness descends the ladder of latitudes each day. For the atmosphere over North America, it means the doldrum-like circulation of summer is at an end, and storm movement across the continent will soon quicken. A new climatological season is at hand, and all living things must make adjustments to the changing weather conditions.
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