The official National Weather Service forecast for Keystone Heights — 29.7861°N, 82.0315°W, population 8,218, 25.9 miles from I-75. Forecasts here are written by NWS JAX, this county’s forecast office.
| Clay County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 67 | 71 | 76 | 81 | 87 | 91 | 92 | 91 | 88 | 82 | 75 | 70 | 81 |
| Avg low °F | 43 | 47 | 51 | 57 | 64 | 70 | 72 | 73 | 70 | 62 | 53 | 47 | 59 |
| Precip in | 2.7 | 3.1 | 3.4 | 2.8 | 3.3 | 7.0 | 6.6 | 7.4 | 6.3 | 3.4 | 2.1 | 3.0 | 51.1 |
1996–2025 normals for Clay County — the climate division Keystone Heights sits in. All-time county record high 103.1°F (1998-06-20); record low 10.6°F (1985-01-22). Source: NOAA / National Weather Service.