Frost dates in Aroostook County, Maine
The average last spring frost in Aroostook County falls May 6 to Jun 2 and the average first fall frost Sep 13 to Oct 2, depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 3b to 5a. Places: Ashland, Blaine, Caribou, Eagle Lake, Fort Fairfield, Fort Kent. Pick a ZIP for 10% and 90% odds, soil temperature and the 7-day freeze forecast.
| ZIP | Place | Last spring frost | First fall frost | Zone |
|---|---|---|---|---|
| 04451 | May 25 | Sep 24 | 5a | |
| 04459 | Mattawamkeag | May 17 | Sep 29 | 5a |
| 04471 | May 27 | Sep 18 | 4b | |
| 04497 | May 25 | Sep 24 | 4b | |
| 04730 | Houlton | May 19 | Sep 23 | 4b |
| 04732 | Ashland | May 14 | Sep 26 | 4a |
| 04733 | May 17 | Sep 29 | 5a | |
| 04734 | Blaine | May 25 | Sep 18 | 4a |
| 04735 | May 25 | Sep 18 | 4b | |
| 04736 | Caribou | May 7 | Oct 1 | 4a |
| 04737 | May 30 | Sep 13 | 3b | |
| 04739 | Eagle Lake | May 23 | Sep 24 | 4a |
| 04740 | May 14 | Sep 26 | 4a | |
| 04742 | Fort Fairfield | May 7 | Oct 1 | 4a |
| 04743 | Fort Kent | May 23 | Sep 24 | 4b |
| 04745 | May 6 | Oct 2 | 4b | |
| 04746 | Grand Isle | May 6 | Oct 2 | 4a |
| 04747 | Island Falls | May 13 | Sep 30 | 4b |
| 04750 | Limestone | May 16 | Sep 24 | 4a |
| 04756 | Madawaska | May 6 | Oct 2 | 4b |
| 04757 | Mapleton | May 14 | Sep 26 | 4a |
| 04758 | Mars Hill | May 25 | Sep 18 | 4a |
| 04760 | May 25 | Sep 18 | 4a | |
| 04761 | May 27 | Sep 18 | 4b | |
| 04762 | May 7 | Oct 1 | 4a | |
| 04763 | Oakfield | May 27 | Sep 18 | 4b |
| 04764 | May 25 | Sep 18 | 4b | |
| 04766 | May 7 | Oct 1 | 4a | |
| 04768 | Jun 2 | Sep 15 | 4a | |
| 04769 | Presque Isle | May 14 | Sep 26 | 4a |
| 04772 | May 6 | Oct 2 | 4a | |
| 04773 | May 6 | Oct 2 | 4b | |
| 04774 | Jun 2 | Sep 15 | 4b | |
| 04776 | May 13 | Sep 30 | 5a | |
| 04779 | May 6 | Oct 2 | 4a | |
| 04780 | May 13 | Sep 30 | 4b | |
| 04781 | May 23 | Sep 24 | 4a | |
| 04783 | May 7 | Oct 1 | 4a | |
| 04785 | Van Buren | May 23 | Sep 26 | 4a |
| 04786 | Washburn | May 7 | Oct 1 | 4a |
| 04787 | May 14 | Sep 26 | 4a |
Nearby counties
Piscataquis County Penobscot County Washington County Somerset County Waldo County Hancock County
All Maine counties · Download Maine frost dates (CSV)
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