Ohio frost dates: B
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Bainbridge | Apr 21 | Oct 22 | 184 d | 6b |
| Bakersville | Apr 18 | Oct 28 | 193 d | 6b |
| Baltic | Apr 18 | Oct 28 | 193 d | 6a |
| Baltimore | Apr 26 | Oct 13 | 170 d | 6b |
| Bannock | Apr 21 | Oct 25 | 187 d | 6b |
| Barberton | Apr 24 | Oct 28 | 187 d | 6b |
| Barlow | Apr 14 | Oct 30 | 199 d | 6b |
| Barnesville | Apr 27 | Oct 22 | 178 d | 6b |
| Bartlett | Apr 24 | Oct 22 | 181 d | 6b |
| Barton | Apr 20 | Oct 29 | 192 d | 6b |
| Bascom | Apr 23 | Oct 23 | 183 d | 6b |
| Batavia | Apr 23 | Oct 18 | 178 d | 6b |
| Bath | Apr 30 | Oct 21 | 174 d | 6b |
| Bay Village | Apr 20 | Nov 3 | 197 d | 7a |
| Beach City | Apr 30 | Oct 15 | 168 d | 6b |
| Beachwood | Apr 8 | Nov 12 | 218 d | 6b |
| Beallsville | Apr 27 | Oct 22 | 178 d | 6b |
| Beaver | Apr 22 | Oct 21 | 182 d | 6b |
| Beaverdam | Apr 23 | Oct 22 | 182 d | 6a |
| Bedford | Apr 8 | Nov 12 | 218 d | 6b |
| Bellaire | Apr 20 | Oct 29 | 192 d | 6b |
| Bellbrook | Apr 17 | Oct 26 | 192 d | 6b |
| Belle Center | Apr 22 | Oct 27 | 188 d | 6a |
| Belle Valley | Apr 30 | Oct 14 | 167 d | 6b |
| Bellefontaine | Apr 26 | Oct 20 | 177 d | 6a |
| Bellevue | Apr 25 | Oct 25 | 183 d | 6a |
| Bellville | Apr 30 | Oct 15 | 168 d | 6a |
| Belmont | Apr 27 | Oct 22 | 178 d | 6b |
| Belmore | Apr 24 | Oct 21 | 180 d | 6a |
| Beloit | May 2 | Oct 13 | 164 d | 6a |
| Belpre | Apr 14 | Oct 30 | 199 d | 6b |
| Benton Ridge | Apr 19 | Oct 23 | 187 d | 6a |
| Bentonville | Apr 29 | Oct 11 | 165 d | 6b |
| Berea | Apr 20 | Nov 3 | 197 d | 6b |
| Bergholz | Apr 22 | Oct 28 | 189 d | 6b |
| Berkey | Apr 22 | Oct 24 | 185 d | 6a |
| Berlin | May 2 | Oct 14 | 165 d | 6a |
| Berlin Center | May 8 | Oct 12 | 157 d | 6a |
| Berlin Heights | Apr 25 | Oct 25 | 183 d | 6b |
| Bethel | Apr 16 | Oct 31 | 198 d | 6b |
| Bethesda | Apr 27 | Oct 22 | 178 d | 6b |
| Bettsville | Apr 21 | Oct 24 | 186 d | 6a |
| Beverly | Apr 24 | Oct 22 | 181 d | 6b |
| Bidwell | Apr 18 | Oct 28 | 193 d | 6b |
| Big Prairie | May 2 | Oct 14 | 165 d | 6a |
| Birmingham | Apr 27 | Oct 22 | 178 d | 6b |
| Blacklick | Apr 18 | Oct 27 | 192 d | 6b |
| Bladensburg | May 2 | Oct 8 | 159 d | 6a |
| Blaine | Apr 20 | Oct 29 | 192 d | 6b |
| Blakeslee | Apr 28 | Oct 18 | 173 d | 6a |
| Blanchester | Apr 19 | Oct 22 | 186 d | 6b |
| Blissfield | Apr 18 | Oct 28 | 193 d | 6a |
| Bloomdale | Apr 24 | Oct 21 | 180 d | 6b |
| Bloomingburg | Apr 23 | Oct 21 | 181 d | 6b |
| Bloomingdale | Apr 29 | Oct 20 | 174 d | 6b |
| Bloomville | Apr 23 | Oct 23 | 183 d | 6a |
| Blue Creek | Apr 21 | Oct 24 | 186 d | 6b |
| Blue Rock | Apr 19 | Oct 25 | 189 d | 6b |
| Bluffton | Apr 23 | Oct 22 | 182 d | 6a |
| Bolivar | Apr 30 | Oct 15 | 168 d | 6b |
| Botkins | Apr 27 | Oct 20 | 176 d | 6a |
| Bourneville | Apr 20 | Oct 22 | 185 d | 6b |
| Bowerston | Apr 29 | Oct 15 | 169 d | 6b |
| Bowersville | Apr 20 | Oct 20 | 183 d | 6b |
| Bowling Green | Apr 22 | Oct 25 | 186 d | 6b |
| Bradford | Apr 18 | Oct 23 | 188 d | 6a |
| Bradner | Apr 22 | Oct 25 | 186 d | 6b |
| Brady Lake | Apr 21 | Oct 29 | 191 d | 6a |
| Brecksville | Apr 20 | Nov 3 | 197 d | 6b |
| Bremen | Apr 22 | Oct 24 | 185 d | 6a |
| Brewster | Apr 24 | Oct 26 | 185 d | 6b |
| Brice | Apr 23 | Oct 19 | 179 d | 6b |
| Bridgeport | Apr 20 | Oct 29 | 192 d | 6b |
| Brilliant | Apr 23 | Oct 25 | 185 d | 6b |
| Brinkhaven | May 2 | Oct 8 | 159 d | 6a |
| Bristolville | Apr 30 | Oct 23 | 176 d | 6a |
| Broadview Heights | Apr 20 | Nov 3 | 197 d | 6a |
| Broadway | Apr 19 | Oct 26 | 190 d | 6a |
| Brookfield | May 1 | Oct 17 | 169 d | 6a |
| Brookpark | Apr 20 | Nov 3 | 197 d | 6b |
| Brookville | Apr 16 | Oct 28 | 195 d | 6a |
| Brownsville | Apr 22 | Oct 18 | 179 d | 6a |
| Brunswick | Apr 20 | Nov 3 | 197 d | 6b |
| Bryan | Apr 26 | Oct 17 | 174 d | 6a |
| Buchtel | Apr 25 | Oct 23 | 181 d | 6a |
| Buckeye Lake | Apr 22 | Oct 18 | 179 d | 6a |
| Buckland | Apr 24 | Oct 24 | 183 d | 6a |
| Bucyrus | Apr 19 | Oct 27 | 191 d | 6a |
| Buffalo | Apr 28 | Oct 17 | 172 d | 6b |
| Burbank | Apr 29 | Oct 19 | 173 d | 6a |
| Burghill | May 1 | Oct 17 | 169 d | 6a |
| Burgoon | Apr 21 | Oct 24 | 186 d | 6a |
| Burkettsville | Apr 27 | Oct 19 | 175 d | 6a |
| Burton | May 5 | Oct 18 | 166 d | 6a |
| Butler | May 2 | Oct 8 | 159 d | 6a |
| Byesville | Apr 28 | Oct 17 | 172 d | 6b |