Maine frost dates by county and ZIP code
Across 427 Maine ZIP codes the average last spring frost runs Apr 21 to Jun 2 and the average first fall frost Sep 13 to Oct 26 (50% odds, 32°F, NOAA 1991–2020 normals), with USDA hardiness zones. Download the table as CSV.
Counties
- Androscoggin
- Aroostook
- Cumberland
- Franklin
- Hancock
- Kennebec
- Knox
- Lincoln
- Oxford
- Penobscot
- Piscataquis
- Sagadahoc
- Somerset
- Waldo
- Washington
- York
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