The official National Weather Service forecast for Eaton — 39.7439°N, 84.6366°W, population 8,067, 10.4 miles from I-70.
| Preble County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 36 | 40 | 51 | 63 | 73 | 81 | 84 | 83 | 78 | 66 | 52 | 41 | 62 |
| Avg low °F | 20 | 23 | 31 | 40 | 51 | 60 | 63 | 61 | 54 | 43 | 33 | 26 | 42 |
| Precip in | 3.3 | 2.7 | 3.8 | 4.4 | 4.6 | 4.9 | 4.3 | 3.1 | 3.2 | 3.1 | 2.9 | 3.3 | 43.6 |
1996–2025 normals for Preble County — the climate division Eaton sits in. All-time county record high 102.5°F (2012-06-29); record low -27.3°F (1994-01-19). Source: NOAA / National Weather Service.