The official National Weather Service forecast for Rockville — 39.7625°N, 87.2292°W, 21.9 miles from I-70. Forecasts here are written by NWS IND, this county’s forecast office.
| Parke County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 36 | 40 | 52 | 64 | 74 | 83 | 85 | 84 | 79 | 67 | 52 | 40 | 63 |
| Avg low °F | 19 | 22 | 32 | 41 | 52 | 61 | 64 | 62 | 54 | 43 | 33 | 25 | 42 |
| Precip in | 2.8 | 2.5 | 3.3 | 4.6 | 4.5 | 5.3 | 4.2 | 3.1 | 2.9 | 3.4 | 2.8 | 3.0 | 42.4 |
1996–2025 normals for Parke County — the climate division Rockville sits in. All-time county record high 104.2°F (2012-07-08); record low -24.4°F (1994-01-19). Source: NOAA / National Weather Service.