The official National Weather Service forecast for Cromwell — 41.4006°N, 85.6158°W, 24 miles from I-90. Forecasts here are written by NWS IWX, this county’s forecast office.
| Noble County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 32 | 36 | 48 | 60 | 71 | 80 | 83 | 81 | 76 | 63 | 49 | 37 | 60 |
| Avg low °F | 17 | 20 | 28 | 38 | 49 | 59 | 62 | 60 | 53 | 42 | 32 | 23 | 40 |
| Precip in | 2.3 | 2.1 | 2.5 | 3.5 | 4.3 | 4.1 | 4.0 | 3.8 | 2.8 | 3.1 | 2.6 | 2.5 | 37.6 |
1996–2025 normals for Noble County — the climate division Cromwell sits in. All-time county record high 103.0°F (2012-07-07); record low -21.5°F (1994-01-19). Source: NOAA / National Weather Service.