The official National Weather Service forecast for Plainfield — 39.7042°N, 86.3994°W, 4.1 miles from I-70. Forecasts here are written by NWS IND, this county’s forecast office.
| Hendricks County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 35 | 40 | 51 | 63 | 73 | 81 | 84 | 83 | 78 | 65 | 52 | 40 | 62 |
| Avg low °F | 19 | 22 | 31 | 41 | 52 | 61 | 64 | 62 | 54 | 44 | 33 | 25 | 42 |
| Precip in | 3.0 | 2.5 | 3.5 | 4.4 | 4.7 | 4.9 | 4.3 | 3.2 | 3.1 | 3.4 | 2.9 | 3.1 | 43.0 |
1996–2025 normals for Hendricks County — the climate division Plainfield sits in. All-time county record high 102.5°F (2012-07-08); record low -26.5°F (1994-01-19). Source: NOAA / National Weather Service.