The official National Weather Service forecast for Westphalia — 42.9295°N, 84.7986°W, 6.2 miles from I-96. Forecasts here are written by NWS GRR, this county’s forecast office.
| Clinton County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 31 | 34 | 45 | 58 | 69 | 79 | 83 | 81 | 74 | 61 | 47 | 36 | 58 |
| Avg low °F | 17 | 18 | 26 | 36 | 47 | 57 | 61 | 59 | 52 | 41 | 31 | 23 | 39 |
| Precip in | 2.1 | 1.9 | 2.1 | 3.2 | 4.0 | 3.6 | 3.1 | 3.5 | 2.6 | 3.3 | 2.3 | 2.1 | 33.8 |
1996–2025 normals for Clinton County — the climate division Westphalia sits in. All-time county record high 100.9°F (1988-07-07); record low -18.8°F (1994-01-19). Source: NOAA / National Weather Service.