NWS Jacksonville » Climate Page » St. Simons Island Normals for December
| SSI | November Normals | December Normals | January Normals |
| November Records | December Records | January Records |
| St. Simons Island Normals for December | |||||||
| Day | High | Low | Avg | Pcpn | Year To Date | HDD | CDD |
| 01 | 66 | 49 | 58 | 0.08 | 42.44 | 08 | 01 |
| 02 | 66 | 49 | 57 | 0.08 | 42.52 | 09 | 01 |
| 03 | 66 | 48 | 57 | 0.08 | 42.60 | 09 | 01 |
| 04 | 65 | 48 | 57 | 0.08 | 42.68 | 09 | 01 |
| 05 | 65 | 48 | 57 | 0.08 | 42.76 | 09 | 01 |
| 06 | 65 | 48 | 56 | 0.08 | 42.84 | 09 | 01 |
| 07 | 65 | 47 | 56 | 0.08 | 42.92 | 10 | 01 |
| 08 | 64 | 47 | 56 | 0.08 | 43.00 | 10 | 01 |
| 09 | 64 | 47 | 55 | 0.08 | 43.08 | 10 | 01 |
| 10 | 64 | 47 | 55 | 0.09 | 43.17 | 10 | 00 |
| 11 | 64 | 46 | 55 | 0.08 | 43.25 | 10 | 00 |
| 12 | 63 | 46 | 55 | 0.08 | 43.33 | 11 | 00 |
| 13 | 63 | 46 | 55 | 0.08 | 43.41 | 11 | 00 |
| 14 | 63 | 46 | 54 | 0.09 | 43.50 | 11 | 00 |
| 15 | 63 | 45 | 54 | 0.08 | 43.58 | 11 | 00 |
| 16 | 63 | 45 | 54 | 0.09 | 43.67 | 11 | 00 |
| 17 | 62 | 45 | 54 | 0.08 | 43.75 | 12 | 00 |
| 18 | 62 | 45 | 53 | 0.10 | 43.85 | 12 | 00 |
| 19 | 62 | 45 | 53 | 0.09 | 43.94 | 12 | 00 |
| 20 | 62 | 44 | 53 | 0.09 | 44.03 | 12 | 00 |
| 21 | 62 | 44 | 53 | 0.10 | 44.13 | 12 | 00 |
| 22 | 62 | 44 | 53 | 0.09 | 44.22 | 13 | 00 |
| 23 | 61 | 44 | 53 | 0.10 | 44.32 | 13 | 00 |
| 24 | 61 | 44 | 52 | 0.09 | 44.41 | 13 | 00 |
| 25 | 61 | 44 | 52 | 0.08 | 44.49 | 13 | 00 |
| 26 | 61 | 43 | 52 | 0.09 | 44.58 | 13 | 00 |
| 27 | 61 | 43 | 52 | 0.08 | 44.66 | 13 | 00 |
| 28 | 61 | 43 | 52 | 0.09 | 44.75 | 13 | 00 |
| 29 | 61 | 43 | 52 | 0.08 | 44.83 | 13 | 00 |
| 30 | 61 | 43 | 52 | 0.08 | 44.91 | 14 | 00 |
| 31 | 61 | 43 | 52 | 0.09 | 45.00 | 14 | 00 |
| Month | 62.8 | 45.4 | 54.1 | 2.64 | 45.00 | 0351 | 0013 |
| Season | - | - | - | - | - | 0351 | 0013 |