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It's been a warm fall in the Duluth area, which is marked by a vastly variable growing season depending on how far you are from Lake Superior. In shoreline areas, the average first frost comes in mid-October, with some years making it into November with no sub-freezing temperatures. Just a few miles away from the shore you are lucky to make it into October without a frost. It is currently October 8th and there has been no frost either at my home (about 10 miles inland) or at the airport (about 6 miles away), although my aunt's garden crops - she lives about a further 5 miles inland - were killed by a frost in mid-September. It was a beautiful 70 degrees today, and no temperatures in the 30's are expected until Sunday night. We are set to exceed our record this year (from what I could find, October 10th) for our nearest weather station's most prolonged fall frost.
Chicago's earliest arrival (at 32 degrees) was on Sept. 22, 1995 at O'Hare and its latest (at 30 degrees) was Nov. 24, 1931 at the UofC.
The earliest arrival of killing frost signified by temperatures 28 degrees or lower, was Oct. 2, 1974 (at 28 degrees) at Midway, and the latest arrival (at 27 degrees) was Dec. 3, 1899 at a downtown observation site (Auditorium Tower NE Corner Wabash and Congress) which was the official site back then.
Last edited by chicagogeorge; 10-08-2013 at 08:42 PM..
Not sure about earliest or latest but I do know that in 2010, Downtown Vancouver had a January without a freeze.
Across the water in Victoria, they have gone over 686 days without frost. The winter of 1925/26 did not record a temperature below 34F (1.1C).
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