The official National Weather Service forecast for Newtonsville — 39.182°N, 84.0863°W, 14.5 miles from I-71.
| Clermont County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 39 | 44 | 54 | 66 | 75 | 83 | 86 | 85 | 80 | 68 | 55 | 44 | 65 |
| Avg low °F | 23 | 26 | 33 | 42 | 52 | 61 | 64 | 63 | 56 | 45 | 34 | 28 | 44 |
| Precip in | 3.3 | 3.3 | 4.2 | 4.6 | 4.9 | 4.8 | 4.5 | 3.3 | 3.4 | 3.2 | 3.0 | 3.6 | 46.1 |
1996–2025 normals for Clermont County — the climate division Newtonsville sits in. All-time county record high 103.3°F (2012-07-08); record low -23.6°F (1994-01-19). Source: NOAA / National Weather Service.