The official National Weather Service forecast for Sioux Center — 43.0797°N, 96.1756°W, population 8,222, 31.3 miles from I-29.
| Sioux County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 27 | 31 | 45 | 59 | 71 | 81 | 85 | 82 | 76 | 62 | 46 | 31 | 58 |
| Avg low °F | 9 | 12 | 24 | 35 | 47 | 58 | 62 | 59 | 51 | 38 | 25 | 14 | 36 |
| Precip in | 0.7 | 0.8 | 1.6 | 2.9 | 4.1 | 4.7 | 3.3 | 3.3 | 3.0 | 2.4 | 1.2 | 1.0 | 29.0 |
1996–2025 normals for Sioux County — the climate division Sioux Center sits in. All-time county record high 104.6°F (1988-06-22); record low -30.0°F (1970-01-19). Source: NOAA / National Weather Service.