The official National Weather Service forecast for New Carlisle — 39.9362°N, 84.0255°W, population 5,507, 5.1 miles from I-70.
| Clark 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 | 65 | 52 | 41 | 62 |
| Avg low °F | 21 | 23 | 31 | 41 | 51 | 60 | 63 | 62 | 55 | 44 | 34 | 26 | 43 |
| Precip in | 3.1 | 2.6 | 3.7 | 4.3 | 4.8 | 4.5 | 4.5 | 3.2 | 3.3 | 2.9 | 2.9 | 3.2 | 43.0 |
1996–2025 normals for Clark County — the climate division New Carlisle sits in. All-time county record high 101.6°F (1988-06-26); record low -24.3°F (1994-01-19). Source: NOAA / National Weather Service.