September Weather

September Average Temperatures

September Average Temperatures

| Categories: Eye on the Sky, Skywatch Almanac Weather, Weather, What's Happening

Weather almost always takes a back seat to the harvest of the fields and gardens, as well as the blaze of foliage by late in the month.  Yet the same decreasing daylight that signals plants to ripen their fruit, and triggers chemical changes in the leaves to stop making green and reveal their true colors, has a pronounced affect on the weather.  Longer nights allow cool air to collect over the tundra in northern Canada, occasionally dropping south to curtail any tardy spell of summer warmth.  The North Atlantic actually reaches its warmest temperatures on the average, promoting high pressure, and leaving us with less rain than summer, barring a visit from the tropics.  Though Vermont’s inland location spares it the greatest wrath of any hurricane, the dying storms may still strip the early leaves, and suddenly fill the thirsty river beds to punctuate the transition from summer to fall.

Weather Highlights

2 – 1967:  An early frost ended the growing season in Grafton, NH, falling to 29 degrees.  The coldest was North Danville, VT, at 27.

3 – 2010:  September heat wave; 92, 92, 91, and 92 in Burlington, VT from the 30th to the 3rd.  Springfield, VT roasted at 95 on the 2nd.

7 – 1953:  Late-season heat wave ended with a soaking rain; Bloomfield, VT 3.11 inches, and West Danville 4.33 inches.

15 – 1939: A late-season heat-wave from the 15th to the 17th;  East Barnet, VT was 96, Burlington’s 92 is also the latest 90 degree day on record.

20 – 1845:  A tremendous tornado crossed the Adirondacks, finishing as a water spout over Lake Champlain, crossing just south of Port Kent east to South Burlington

27 – 1947:  After a hot summer, the coldest weather so early in the season, St. Johnsbury falling to 22°F, Dorset, VT set the state record at 15°F.


“The morns are meeker than they were,

The nuts are getting brown;

The berry’s cheek is plumper,

The rose is out of town”

               – Emily Dickinson


“A good apple year is a good snow year”


September Records and Averages

Warmest: 67.9°F in 1961

Coldest: 54.2°F in 1950

Wettest: 8.59 inches in 1999

Driest: 0.68 inches in 1908

Tags: Fairbanks Musem, Fairbanks Museum weather, Mark Breen, meteorology, Saint Johnsbury, skywatch, St. Johnsbury, Vermont Weather Almanac, weather lore