Freeze Warnings and Frost Advisories have been posted for the entire state of Vermont.
The National Weather Service office in Burlington has posted a freeze warning for our area, and indeed the entire state of Vermont is under either freeze warnings or frost advisories, so cover up vegetation as necessary. Though the first frost for valley locations in the Central and Northern Green Mountains does typically happen in September, the average date for the occurrence is toward the end of the month (September 27th for Morrisville and September 30th for Montpelier) so this is a bit on the earlier side. Yesterday in the Northern New England thread at Americanwx.com, Powderfreak posted the chart from the National Weather Service that shows the average dates and ranges for first frost at some of our Vermont climate locations – mid September is in the 10th – 25th percentile. Take a look at that post for more information about average dates of 32 F temperatures around the state.
Low temperatures are going to be down in the 20s F in some locations overnight as the first frosts and freezes hit the North Country of Vermont and New York.