The official National Weather Service forecast for Saint Augustine — 29.8947°N, 81.3145°W, 6.2 miles from I-95. Forecasts here are written by NWS JAX, this county’s forecast office.
| St. Johns County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 67 | 70 | 75 | 80 | 86 | 89 | 91 | 90 | 87 | 82 | 75 | 70 | 80 |
| Avg low °F | 46 | 49 | 53 | 59 | 66 | 71 | 73 | 74 | 72 | 64 | 55 | 50 | 61 |
| Precip in | 2.6 | 3.1 | 3.3 | 2.8 | 3.3 | 6.4 | 6.1 | 7.4 | 7.2 | 4.1 | 2.4 | 2.9 | 51.6 |
1996–2025 normals for St. Johns County — the climate division Saint Augustine sits in. All-time county record high 101.4°F (1998-06-20); record low 13.0°F (1985-01-22). Source: NOAA / National Weather Service.