The official National Weather Service forecast for Alpena — 45.0617°N, 83.4327°W, population 15,425, 57.3 miles from I-75. Forecasts here are written by NWS APX, this county’s forecast office.
| Alpena County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 28 | 30 | 40 | 52 | 65 | 75 | 80 | 78 | 72 | 58 | 44 | 33 | 55 |
| Avg low °F | 13 | 13 | 20 | 31 | 41 | 52 | 57 | 56 | 49 | 39 | 30 | 20 | 35 |
| Precip in | 1.8 | 1.6 | 2.0 | 2.9 | 2.9 | 3.1 | 3.4 | 3.2 | 2.9 | 3.1 | 1.9 | 2.2 | 31.0 |
1996–2025 normals for Alpena County — the climate division Alpena sits in. All-time county record high 98.6°F (2018-07-01); record low -37.4°F (1979-02-17). Source: NOAA / National Weather Service.