North Dakota · 50 stations
North Dakota Frost Dates: 50 Weather Stations
50 NOAA weather stations in North Dakota with at least 25 years of frost records.
| Station | Zone | Last spring frost (50%) | First fall frost (50%) | Frost-free days |
|---|---|---|---|---|
| Ashley, ND | 4b | May 13 | September 28 | 137 |
| Bismarck, ND | 4a | May 14 | September 27 | 136 |
| Bottineau, ND | 3b | May 15 | September 25 | 133 |
| Bowman, ND | 4b | May 16 | September 25 | 132 |
| Cavalier, ND | 4a | May 12 | September 30 | 139 |
| Crosby, ND | 4a | May 17 | September 23 | 128 |
| Drake, ND | 3b | May 12 | September 27 | 137 |
| Forman, ND | 4a | May 7 | October 1 | 146 |
| Fortuna, ND | 3b | May 19 | September 17 | 121 |
| Fullerton, ND | 4a | May 9 | September 28 | 141 |
| Garrison, ND | 4a | May 12 | September 30 | 140 |
| Grand Forks (Airport), ND | 4a | May 16 | September 27 | 133 |
| Grassy Butte, ND | 4a | May 18 | September 23 | 125 |
| Harvey, ND | 4a | May 12 | September 26 | 135 |
| Hazelton, ND | 4a | May 12 | September 27 | 136 |
| Heart Butte Dam, ND | 4a | May 14 | September 29 | 136 |
| Hebron, ND | 4a | May 19 | September 21 | 123 |
| Jamestown, ND | 4b | May 11 | September 28 | 138 |
| Jamestown State Hosp, ND | 4b | May 8 | September 29 | 143 |
| Keene, ND | 4a | May 20 | September 20 | 121 |
| Kenmare, ND | 4a | May 15 | September 23 | 129 |
| Mandan, ND | 4a | May 13 | September 27 | 136 |
| Max, ND | 4a | May 10 | September 28 | 141 |
| McClusky, ND | 4b | May 8 | October 1 | 145 |
| McHenry, ND | 4a | May 12 | September 28 | 139 |
| McLeod, ND | 4a | May 6 | September 29 | 145 |
| Medora, ND | 4a | May 19 | September 20 | 123 |
| Minot (Airport), ND | 4a | May 10 | October 1 | 144 |
| Napoleon, ND | 4a | May 13 | September 28 | 136 |
| New England, ND | 4a | May 16 | September 24 | 128 |
| New Salem, ND | 4a | May 18 | September 24 | 127 |
| Pembina, ND | 3b | May 16 | September 29 | 137 |
| Petersburg, ND | 4a | May 11 | September 28 | 138 |
| Pretty Rock, ND | 4a | May 20 | September 23 | 124 |
| Richardton Abbey, ND | 4b | May 9 | October 1 | 145 |
| Rugby, ND | 3b | May 17 | September 23 | 129 |
| Steele, ND | 4a | May 15 | September 25 | 133 |
| Streeter, ND | 4a | May 13 | September 30 | 139 |
| Towner, ND | 3b | May 17 | September 22 | 126 |
| Turtle Lake, ND | 4a | May 14 | September 26 | 136 |
| Underwood, ND | 4b | May 10 | September 29 | 139 |
| Upham, ND | 3b | May 15 | September 25 | 132 |
| Williston (Sloulin Airport), ND | 4a | May 21 | September 21 | 123 |
| Willow City, ND | 3b | May 21 | September 20 | 119 |
| near Casselton, ND | 4a | May 9 | October 1 | 143 |
| near Dickinson, ND | 4b | May 18 | September 25 | 129 |
| near Fargo, ND | 4a | May 10 | September 30 | 143 |
| near Grand Forks, ND | 4a | May 10 | October 1 | 144 |
| near Minot, ND | 4a | May 13 | September 27 | 136 |
| near Williston, ND | 4a | May 13 | September 26 | 135 |