The official National Weather Service forecast for Fort Oglethorpe — 34.949°N, 85.2569°W, 4 miles from I-75. Forecasts here are written by NWS FFC, this county’s forecast office.
| Catoosa County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 50 | 55 | 64 | 72 | 80 | 87 | 89 | 89 | 84 | 73 | 62 | 53 | 72 |
| Avg low °F | 31 | 34 | 41 | 47 | 57 | 64 | 68 | 67 | 61 | 49 | 39 | 34 | 49 |
| Precip in | 5.0 | 4.9 | 5.1 | 4.6 | 4.5 | 3.9 | 4.1 | 4.4 | 4.3 | 3.3 | 4.1 | 5.0 | 53.2 |
1996–2025 normals for Catoosa County — the climate division Fort Oglethorpe sits in. All-time county record high 104.0°F (1980-07-17); record low -10.5°F (1985-01-21). Source: NOAA / National Weather Service.