Missouri frost dates: B
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Bakersfield | Apr 9 | Oct 23 | 197 d | 7a |
| Ballwin | Apr 4 | Oct 29 | 208 d | 7a |
| Baring | Apr 23 | Oct 17 | 177 d | 6a |
| Barnard | Apr 17 | Oct 20 | 186 d | 6a |
| Barnett | Apr 7 | Nov 1 | 208 d | 6b |
| Barnhart | Apr 9 | Oct 26 | 200 d | 6b |
| Bates City | Apr 13 | Oct 23 | 193 d | 6a |
| Beaufort | Apr 11 | Oct 23 | 195 d | 6b |
| Belgrade | Apr 11 | Oct 28 | 200 d | 6b |
| Bell City | Apr 7 | Oct 27 | 203 d | 7a |
| Belle | Apr 12 | Oct 25 | 196 d | 6b |
| Belleview | Apr 11 | Oct 28 | 200 d | 6b |
| Bellflower | Apr 14 | Oct 23 | 192 d | 6b |
| Belton | Apr 8 | Oct 29 | 204 d | 6b |
| Benton | Apr 5 | Oct 25 | 203 d | 7a |
| Benton City | Apr 11 | Oct 25 | 197 d | 6b |
| Berger | Apr 27 | Oct 13 | 169 d | 6b |
| Bernie | Mar 29 | Nov 3 | 219 d | 7b |
| Bertrand | Mar 26 | Nov 6 | 225 d | 7b |
| Bethany | Apr 16 | Oct 22 | 189 d | 6a |
| Bethel | Apr 17 | Oct 19 | 185 d | 6a |
| Beulah | Apr 20 | Oct 19 | 182 d | 6b |
| Bevier | Apr 8 | Oct 28 | 203 d | 6a |
| Billings | Apr 15 | Oct 23 | 191 d | 6b |
| Birch Tree | Apr 22 | Oct 18 | 179 d | 6b |
| Bismarck | Apr 13 | Oct 21 | 191 d | 6b |
| Bixby | Apr 11 | Oct 28 | 200 d | 6b |
| Black | Apr 11 | Oct 28 | 200 d | 6b |
| Blackburn | Apr 17 | Oct 20 | 186 d | 6b |
| Blackwater | Apr 5 | Oct 29 | 207 d | 6b |
| Blackwell | Apr 11 | Oct 28 | 200 d | 6b |
| Blairstown | Apr 17 | Oct 21 | 187 d | 6b |
| Bland | Apr 11 | Oct 21 | 193 d | 6b |
| Blodgett | Mar 26 | Nov 6 | 225 d | 7b |
| Bloomfield | Apr 7 | Oct 27 | 203 d | 7a |
| Bloomsdale | Apr 9 | Oct 26 | 200 d | 6b |
| Blue Eye | Apr 8 | Nov 2 | 208 d | 7a |
| Blue Springs | Apr 7 | Oct 29 | 205 d | 6b |
| Blythedale | Apr 17 | Oct 21 | 187 d | 5b |
| Bogard | Apr 16 | Oct 23 | 190 d | 6a |
| Bois D Arc | Apr 11 | Oct 24 | 196 d | 6b |
| Bolckow | Apr 17 | Oct 20 | 186 d | 6a |
| Bolivar | Apr 14 | Oct 23 | 192 d | 6b |
| Bonne Terre | Apr 13 | Oct 21 | 191 d | 6b |
| Bonnots Mill | Apr 10 | Oct 26 | 199 d | 6b |
| Boonville | Apr 12 | Oct 25 | 196 d | 6b |
| Boss | Apr 17 | Oct 18 | 184 d | 6b |
| Bosworth | Apr 10 | Oct 29 | 202 d | 6a |
| Bourbon | Apr 26 | Oct 8 | 165 d | 6b |
| Bowling Green | Apr 13 | Oct 23 | 193 d | 6a |
| Bradleyville | Apr 14 | Oct 21 | 190 d | 7a |
| Bragg City | Mar 31 | Nov 1 | 215 d | 7b |
| Braggadocio | Mar 24 | Nov 9 | 230 d | 7b |
| Brandsville | Apr 16 | Oct 21 | 188 d | 7a |
| Branson | Apr 6 | Oct 31 | 208 d | 7a |
| Brashear | Apr 21 | Oct 19 | 181 d | 6a |
| Braymer | Apr 23 | Oct 17 | 177 d | 6a |
| Brazeau | Apr 19 | Oct 20 | 184 d | 7a |
| Breckenridge | Apr 23 | Oct 17 | 177 d | 6a |
| Briar | Apr 12 | Oct 26 | 197 d | 7a |
| Bridgeton | Apr 2 | Nov 4 | 216 d | 6b |
| Brighton | Apr 14 | Oct 23 | 192 d | 6b |
| Brinktown | Apr 8 | Oct 26 | 201 d | 6b |
| Brixey | Apr 14 | Oct 25 | 194 d | 7a |
| Bronaugh | Apr 7 | Oct 27 | 203 d | 7a |
| Brookfield | Apr 14 | Oct 23 | 192 d | 6a |
| Brookline | Apr 9 | Oct 27 | 201 d | 6b |
| Broseley | Mar 31 | Oct 31 | 214 d | 7b |
| Browning | Apr 15 | Oct 20 | 188 d | 6a |
| Brownwood | Apr 7 | Oct 27 | 203 d | 7a |
| Brumley | Apr 8 | Oct 28 | 203 d | 6b |
| Bruner | Apr 26 | Oct 13 | 170 d | 6b |
| Brunswick | Apr 10 | Oct 29 | 202 d | 6a |
| Bucklin | Apr 14 | Oct 23 | 192 d | 6a |
| Buckner | Apr 10 | Oct 27 | 200 d | 6a |
| Bucyrus | Apr 10 | Oct 23 | 196 d | 6b |
| Buffalo | Apr 23 | Oct 15 | 175 d | 6b |
| Bunceton | Apr 12 | Oct 25 | 196 d | 6b |
| Bunker | Apr 24 | Oct 16 | 175 d | 6b |
| Burfordville | Apr 7 | Oct 29 | 205 d | 7a |
| Burlington Junction | Apr 19 | Oct 17 | 181 d | 5b |
| Butler | Apr 12 | Oct 23 | 194 d | 6b |
| Butterfield | Apr 14 | Oct 26 | 195 d | 7a |