The official National Weather Service forecast for Clay Center — 41.5634°N, 83.3619°W, 4.6 miles from I-80.
| Ottawa County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 34 | 37 | 47 | 60 | 71 | 81 | 84 | 82 | 76 | 64 | 50 | 39 | 60 |
| Avg low °F | 21 | 23 | 31 | 40 | 51 | 61 | 65 | 63 | 56 | 46 | 35 | 27 | 43 |
| Precip in | 2.1 | 2.1 | 2.5 | 3.3 | 3.7 | 3.6 | 3.4 | 3.4 | 3.1 | 2.7 | 2.3 | 2.3 | 34.5 |
1996–2025 normals for Ottawa County — the climate division Clay Center sits in. All-time county record high 101.1°F (1988-06-26); record low -17.8°F (1994-01-19). Source: NOAA / National Weather Service.