The official National Weather Service forecast for Rossburg — 39.3098°N, 84.1177°W, 8.1 miles from I-71.
| Warren County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 38 | 43 | 53 | 65 | 74 | 83 | 85 | 85 | 79 | 67 | 54 | 43 | 64 |
| Avg low °F | 22 | 25 | 33 | 42 | 52 | 61 | 64 | 63 | 56 | 45 | 34 | 27 | 44 |
| Precip in | 3.3 | 2.9 | 3.9 | 4.5 | 4.6 | 4.9 | 4.1 | 3.2 | 3.3 | 3.1 | 2.9 | 3.5 | 44.2 |
1996–2025 normals for Warren County — the climate division Rossburg sits in. All-time county record high 101.8°F (2012-07-08); record low -22.8°F (1994-01-19). Source: NOAA / National Weather Service.