The official National Weather Service forecast for Fern Park — 28.6492°N, 81.3512°W, 2.3 miles from I-4. Forecasts here are written by NWS MLB, this county’s forecast office.
| Seminole County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 71 | 75 | 79 | 83 | 88 | 91 | 92 | 92 | 89 | 84 | 78 | 73 | 83 |
| Avg low °F | 49 | 52 | 56 | 61 | 67 | 72 | 74 | 74 | 73 | 66 | 58 | 53 | 63 |
| Precip in | 2.3 | 2.2 | 2.8 | 2.5 | 3.5 | 7.8 | 6.7 | 7.4 | 7.3 | 3.6 | 2.1 | 2.4 | 50.6 |
1996–2025 normals for Seminole County — the climate division Fern Park sits in. All-time county record high 101.0°F (1998-06-20); record low 18.6°F (1985-01-22). Source: NOAA / National Weather Service.