Oklahoma frost dates: B
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Balko | Apr 14 | Oct 30 | 199 d | 6b |
| Barnsdall | Mar 31 | Oct 31 | 214 d | 7a |
| Bartlesville | Apr 11 | Oct 24 | 196 d | 7a |
| Battiest | Apr 13 | Oct 27 | 197 d | 7b |
| Beaver | Apr 21 | Oct 21 | 183 d | 6b |
| Beggs | Apr 8 | Oct 28 | 203 d | 7b |
| Bennington | Mar 19 | Nov 12 | 238 d | 8a |
| Bessie | Apr 3 | Nov 1 | 212 d | 7b |
| Bethany | Apr 2 | Nov 4 | 216 d | 7b |
| Bethel | Apr 13 | Oct 27 | 197 d | 7b |
| Big Cabin | Apr 7 | Nov 2 | 209 d | 7a |
| Billings | Apr 15 | Oct 26 | 194 d | 7a |
| Binger | Apr 5 | Nov 3 | 212 d | 7b |
| Bison | Apr 14 | Oct 30 | 199 d | 7a |
| Bixby | Apr 1 | Nov 1 | 214 d | 7b |
| Blackwell | Apr 12 | Oct 29 | 200 d | 7a |
| Blair | Apr 10 | Oct 29 | 202 d | 7b |
| Blanchard | Apr 3 | Nov 4 | 215 d | 7b |
| Blanco | Mar 31 | Nov 3 | 217 d | 7b |
| Blocker | Mar 31 | Nov 3 | 217 d | 7b |
| Bluejacket | Apr 6 | Oct 27 | 204 d | 7a |
| Boise City | Apr 26 | Oct 17 | 174 d | 6b |
| Bokchito | Mar 19 | Nov 12 | 238 d | 8a |
| Bokoshe | Mar 23 | Nov 5 | 227 d | 7b |
| Boley | Mar 24 | Nov 9 | 230 d | 7b |
| Boswell | Apr 2 | Nov 1 | 213 d | 8a |
| Bowlegs | Apr 1 | Nov 1 | 214 d | 7b |
| Boynton | Apr 2 | Nov 2 | 214 d | 7b |
| Bradley | Apr 13 | Oct 27 | 197 d | 7b |
| Braggs | Apr 2 | Nov 2 | 214 d | 7b |
| Braman | Apr 12 | Oct 29 | 200 d | 7a |
| Bristow | Apr 9 | Oct 25 | 199 d | 7b |
| Broken Arrow | Apr 1 | Nov 1 | 214 d | 7b |
| Broken Bow | Apr 1 | Nov 2 | 215 d | 8a |
| Bromide | Mar 31 | Nov 5 | 219 d | 7b |
| Buffalo | Apr 13 | Oct 25 | 195 d | 7a |
| Bunch | Mar 30 | Nov 7 | 222 d | 7b |
| Burbank | Apr 11 | Oct 24 | 196 d | 7a |
| Burlington | Apr 8 | Oct 31 | 206 d | 7a |
| Burneyville | Mar 31 | Nov 4 | 218 d | 8a |
| Burns Flat | Apr 3 | Nov 1 | 212 d | 7b |
| Butler | Apr 9 | Oct 28 | 202 d | 7a |
| Byars | Mar 25 | Nov 8 | 228 d | 7b |