The official National Weather Service forecast for Sac City — 42.4222°N, 94.9897°W, 64.4 miles from I-80.
| Sac County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 28 | 32 | 46 | 60 | 71 | 81 | 84 | 81 | 76 | 63 | 47 | 32 | 58 |
| Avg low °F | 10 | 14 | 26 | 36 | 48 | 59 | 63 | 60 | 52 | 40 | 27 | 15 | 38 |
| Precip in | 0.8 | 0.9 | 1.7 | 3.1 | 4.3 | 4.8 | 3.7 | 4.0 | 2.8 | 2.4 | 1.4 | 1.1 | 31.0 |
1996–2025 normals for Sac County — the climate division Sac City sits in. All-time county record high 104.6°F (1955-07-31); record low -27.8°F (1970-01-21). Source: NOAA / National Weather Service.