The official National Weather Service forecast for Boston — 39.7412°N, 84.8519°W, 6.5 miles from I-70. Forecasts here are written by NWS ILN, this county’s forecast office.
| Wayne County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 35 | 39 | 51 | 63 | 73 | 81 | 84 | 83 | 78 | 65 | 51 | 40 | 62 |
| Avg low °F | 19 | 22 | 31 | 40 | 51 | 59 | 63 | 61 | 54 | 43 | 32 | 25 | 42 |
| Precip in | 3.2 | 2.6 | 3.7 | 4.4 | 4.7 | 4.9 | 4.3 | 3.2 | 3.3 | 3.0 | 3.0 | 3.3 | 43.6 |
1996–2025 normals for Wayne County — the climate division Boston sits in. All-time county record high 103.2°F (2012-06-29); record low -27.9°F (1994-01-19). Source: NOAA / National Weather Service.