The official National Weather Service forecast for Ithaca — 43.2917°N, 84.6075°W, 32.8 miles from I-96. Forecasts here are written by NWS GRR, this county’s forecast office.
| Gratiot County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 30 | 33 | 44 | 57 | 69 | 79 | 83 | 81 | 74 | 61 | 47 | 35 | 58 |
| Avg low °F | 17 | 17 | 25 | 35 | 46 | 56 | 60 | 59 | 51 | 41 | 31 | 23 | 38 |
| Precip in | 2.0 | 1.8 | 2.1 | 3.2 | 3.8 | 3.4 | 2.9 | 3.6 | 2.6 | 3.2 | 2.2 | 2.1 | 32.9 |
1996–2025 normals for Gratiot County — the climate division Ithaca sits in. All-time county record high 100.8°F (1988-07-07); record low -21.1°F (1959-02-02). Source: NOAA / National Weather Service.