Frost dates in Maine
Across 82 NOAA stations in Maine, the average last spring frost ranges from April 21 at Woodland to June 2 at Allagash.
| Acadia Np | April 27 | October 22 | 177 |
| Allagash | June 2 | September 15 | 102 |
| Andover 2 | May 19 | September 25 | 129 |
| Augusta State Airport | April 27 | October 16 | 172 |
| Bangor Intl Airport | May 4 | October 4 | 152 |
| Barnard | May 12 | October 1 | 141 |
| Bath | May 10 | October 6 | 149 |
| Belfast | May 7 | October 5 | 151 |
| Bethel 6 Sse | May 6 | October 2 | 147 |
| Brassua Dam | May 23 | September 29 | 128 |
| Bridgewater | May 25 | September 18 | 115 |
| Bridgton 3 Nw | May 5 | October 5 | 151 |
| Brunswick Nas | May 2 | October 10 | 160 |
| Cape Neddick | May 1 | October 14 | 165 |
| Caribou Muni Airport | May 7 | October 1 | 143 |
| Clayton Lake | May 30 | September 13 | 106 |
| Corinna | May 8 | October 3 | 148 |
| Danforth | May 25 | September 24 | 119 |
| Dover-Foxcroft Wwtp | May 15 | September 28 | 134 |
| Durham | May 15 | October 2 | 139 |
| E Sangerville | May 6 | October 7 | 153 |
| E Surry | May 8 | October 9 | 152 |
| East Hiram | May 12 | October 1 | 140 |
| Eastport | April 29 | October 25 | 178 |
| Eustis | May 24 | September 21 | 118 |
| Farmington | May 16 | September 26 | 130 |
| Frenchville Aroostook Airport | May 6 | October 2 | 147 |
| Fryeburg E Slopes Airport | May 17 | September 25 | 128 |
| Ft Kent | May 23 | September 24 | 121 |
| Gardiner | May 1 | October 11 | 163 |
| Grand Lake Stream | May 4 | October 10 | 157 |
| Gray | April 28 | October 19 | 172 |
| Greenville Maine Forestry Svc | May 7 | October 9 | 153 |
| Harmony | May 11 | October 1 | 141 |
| Hartford | May 6 | October 3 | 148 |
| Hollis | May 14 | September 30 | 136 |
| Houlton 5N | May 19 | September 23 | 125 |
| Houlton Intl Airport | May 27 | September 18 | 115 |
| Jackman | May 26 | September 23 | 119 |
| Jonesboro | May 3 | October 9 | 158 |
| Kennebunkport | May 9 | October 3 | 146 |
| Lewiston | April 25 | October 19 | 177 |
| Limestone 4 Nnw | May 16 | September 24 | 129 |
| Lincoln Sanitary District/Wtp | May 4 | October 6 | 153 |
| Livermore Falls 1 E | May 11 | September 29 | 138 |
| Long Falls Dam | May 13 | September 30 | 138 |
| Madison | May 8 | October 5 | 149 |
| Middle Dam | May 19 | October 1 | 133 |
| Millinocket | May 9 | October 5 | 147 |
| Millinocket Muni Airport | May 8 | October 1 | 143 |
| Millinocket Wastewater | May 17 | September 29 | 133 |
| Moosehead | May 13 | September 30 | 137 |
| New Sharon | May 7 | October 2 | 146 |
| Newcastle | April 27 | October 18 | 172 |
| Old Town 2 W | May 13 | September 28 | 137 |
| Orono | May 1 | October 6 | 157 |
| Patten 2 | May 13 | September 30 | 138 |
| Pittston Farm | May 20 | September 23 | 123 |
| Pittston Farms Nepp | May 21 | September 21 | 122 |
| Poland | May 3 | October 7 | 157 |
| Portland Intl Jetport | April 26 | October 15 | 170 |
| Presque Isle | May 14 | September 26 | 131 |
| Rangeley | May 23 | September 27 | 127 |
| Rangeley 2 Nw | May 23 | September 24 | 123 |
| Robbinston | May 5 | October 13 | 160 |
| Rumford 1 Sse | May 4 | October 6 | 155 |
| Rumford 6Sw | May 12 | September 29 | 139 |
| Sanford 2 Nnw | May 16 | September 30 | 136 |
| Sebec Lake | May 16 | October 1 | 135 |
| Tenants Harbor | April 27 | October 25 | 178 |
| Topsfield 2 | May 6 | October 8 | 155 |
| Turner | May 1 | October 10 | 162 |
| Van Buren 2 | May 23 | September 26 | 125 |
| Vanceboro No 2 | May 13 | October 1 | 139 |
| W Rockport 1 Nnw | April 27 | October 19 | 175 |
| Waterville Trtmt Plt | May 2 | October 10 | 159 |
| Wesley | May 2 | October 15 | 164 |
| West Buxton 2 Nnw | May 7 | October 4 | 148 |
| Westport Island | April 28 | October 21 | 175 |
| Windham 2Nw | April 30 | October 20 | 172 |
| Wiscasset Airport | May 8 | October 7 | 151 |
| Woodland | April 21 | October 26 | 185 |
Sources
- U.S. Annual/Seasonal Climate Normals, 1991 to 2020 (freeze probability dates by station), NOAA National Centers for Environmental Information, checked 1 November 2026
- Annual/Seasonal Normals 1991 to 2020 documentation, NOAA National Centers for Environmental Information, checked 1 November 2026
- 2024 Gazetteer Files, ZIP Code Tabulation Areas, US Census Bureau, checked 1 November 2026