The official National Weather Service forecast for Shelbyville — 39.5214°N, 85.7769°W, population 21,208, 12.2 miles from I-65. Forecasts here are written by NWS IND, this county’s forecast office.
| Shelby County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 37 | 41 | 52 | 65 | 74 | 82 | 85 | 84 | 79 | 67 | 53 | 41 | 63 |
| Avg low °F | 21 | 24 | 33 | 42 | 53 | 61 | 64 | 62 | 55 | 44 | 34 | 26 | 43 |
| Precip in | 3.2 | 2.7 | 3.7 | 4.7 | 5.0 | 5.1 | 4.5 | 3.3 | 3.2 | 3.2 | 3.1 | 3.4 | 45.1 |
1996–2025 normals for Shelby County — the climate division Shelbyville sits in. All-time county record high 103.5°F (2012-06-29); record low -24.8°F (1994-01-19). Source: NOAA / National Weather Service.