The official National Weather Service forecast for McDonald — 41.1637°N, 80.7242°W, 7 miles from I-80.
| Trumbull County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 35 | 38 | 48 | 61 | 71 | 79 | 83 | 81 | 76 | 63 | 50 | 40 | 60 |
| Avg low °F | 19 | 20 | 27 | 36 | 47 | 56 | 60 | 58 | 52 | 42 | 32 | 25 | 40 |
| Precip in | 3.0 | 2.5 | 3.1 | 4.0 | 4.1 | 4.6 | 4.2 | 3.9 | 3.8 | 3.7 | 2.9 | 3.1 | 42.9 |
1996–2025 normals for Trumbull County — the climate division McDonald sits in. All-time county record high 98.9°F (1988-07-08); record low -23.9°F (1994-01-19). Source: NOAA / National Weather Service.