The official National Weather Service forecast for Delphi — 40.5875°N, 86.675°W, 11.8 miles from I-65. Forecasts here are written by NWS IND, this county’s forecast office.
| Carroll County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 33 | 38 | 50 | 62 | 73 | 82 | 84 | 83 | 78 | 65 | 51 | 39 | 62 |
| Avg low °F | 18 | 21 | 30 | 39 | 51 | 60 | 63 | 61 | 54 | 43 | 33 | 24 | 41 |
| Precip in | 2.5 | 2.2 | 2.9 | 3.8 | 4.3 | 5.0 | 4.5 | 3.8 | 2.8 | 3.1 | 2.7 | 2.7 | 40.3 |
1996–2025 normals for Carroll County — the climate division Delphi sits in. All-time county record high 102.5°F (1980-07-16); record low -23.7°F (1985-01-20). Source: NOAA / National Weather Service.