The official National Weather Service forecast for Fishers — 39.9556°N, 86.0139°W, 1.1 miles from I-69. Forecasts here are written by NWS IND, this county’s forecast office.
| Hamilton County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 35 | 39 | 51 | 63 | 73 | 82 | 84 | 83 | 78 | 65 | 51 | 40 | 62 |
| Avg low °F | 20 | 22 | 31 | 41 | 51 | 61 | 63 | 62 | 54 | 44 | 33 | 25 | 42 |
| Precip in | 2.8 | 2.5 | 3.3 | 4.2 | 4.6 | 5.1 | 4.1 | 3.5 | 3.2 | 3.2 | 2.8 | 3.0 | 42.3 |
1996–2025 normals for Hamilton County — the climate division Fishers sits in. All-time county record high 102.5°F (2012-06-29); record low -24.9°F (1994-01-19). Source: NOAA / National Weather Service.