The official National Weather Service forecast for Luther — 44.0403°N, 85.6826°W, 58.8 miles from I-75. Forecasts here are written by NWS GRR, this county’s forecast office.
| Lake County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 29 | 32 | 43 | 56 | 69 | 78 | 82 | 79 | 73 | 59 | 45 | 34 | 57 |
| Avg low °F | 15 | 15 | 22 | 32 | 43 | 52 | 56 | 55 | 48 | 38 | 29 | 21 | 36 |
| Precip in | 2.3 | 1.8 | 2.4 | 3.2 | 3.6 | 3.6 | 3.0 | 3.4 | 2.8 | 4.0 | 2.9 | 2.5 | 35.5 |
1996–2025 normals for Lake County — the climate division Luther sits in. All-time county record high 98.0°F (2012-07-07); record low -29.1°F (1996-02-03). Source: NOAA / National Weather Service.