The official National Weather Service forecast for Clear Lake — 43.138°N, 93.3794°W, population 8,406, 8.3 miles from I-35.
| Cerro Gordo County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 25 | 29 | 43 | 58 | 70 | 80 | 82 | 80 | 75 | 61 | 45 | 30 | 56 |
| Avg low °F | 9 | 12 | 24 | 36 | 47 | 58 | 62 | 59 | 51 | 38 | 26 | 15 | 36 |
| Precip in | 0.9 | 1.1 | 2.0 | 3.8 | 4.9 | 5.5 | 4.4 | 4.0 | 3.1 | 2.5 | 1.5 | 1.3 | 35.0 |
1996–2025 normals for Cerro Gordo County — the climate division Clear Lake sits in. All-time county record high 102.2°F (1985-06-09); record low -29.3°F (1996-02-02). Source: NOAA / National Weather Service.