The official National Weather Service forecast for Grandview — 39.1942°N, 84.7244°W, 1.3 miles from I-275.
| Hamilton County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 39 | 44 | 54 | 66 | 75 | 83 | 86 | 86 | 80 | 68 | 54 | 44 | 65 |
| Avg low °F | 23 | 26 | 34 | 43 | 53 | 62 | 65 | 64 | 57 | 45 | 35 | 28 | 45 |
| Precip in | 3.3 | 3.1 | 4.0 | 4.6 | 4.9 | 4.8 | 4.1 | 3.2 | 3.4 | 3.2 | 3.0 | 3.5 | 45.1 |
1996–2025 normals for Hamilton County — the climate division Grandview sits in. All-time county record high 103.4°F (2012-07-08); record low -23.0°F (1994-01-19). Source: NOAA / National Weather Service.