The official National Weather Service forecast for Harrisville — 44.6564°N, 83.2947°W, 53.9 miles from I-75. Forecasts here are written by NWS APX, this county’s forecast office.
| Alcona County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 28 | 31 | 40 | 52 | 65 | 75 | 80 | 78 | 72 | 58 | 45 | 33 | 55 |
| Avg low °F | 13 | 13 | 20 | 31 | 41 | 52 | 57 | 55 | 48 | 38 | 29 | 20 | 35 |
| Precip in | 1.7 | 1.6 | 1.9 | 3.0 | 3.0 | 3.1 | 3.4 | 3.3 | 2.7 | 2.9 | 1.9 | 2.1 | 30.6 |
1996–2025 normals for Alcona County — the climate division Harrisville sits in. All-time county record high 97.9°F (2026-07-15); record low -34.2°F (1979-02-17). Source: NOAA / National Weather Service.