The official National Weather Service forecast for Merrill — 43.4098°N, 84.3289°W, 21 miles from I-75. Forecasts here are written by NWS DTX, this county’s forecast office.
| Saginaw County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 31 | 33 | 44 | 58 | 70 | 79 | 83 | 81 | 75 | 61 | 47 | 36 | 58 |
| Avg low °F | 17 | 17 | 26 | 35 | 47 | 57 | 60 | 59 | 52 | 41 | 31 | 23 | 39 |
| Precip in | 1.9 | 1.8 | 2.0 | 3.1 | 3.7 | 3.6 | 3.0 | 3.6 | 2.7 | 3.1 | 2.1 | 2.0 | 32.6 |
1996–2025 normals for Saginaw County — the climate division Merrill sits in. All-time county record high 101.1°F (1988-07-07); record low -19.5°F (1959-02-02). Source: NOAA / National Weather Service.