The official National Weather Service forecast for Sheldon — 43.1811°N, 95.8561°W, population 5,381, 38 miles from I-90.
| O'Brien County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 26 | 30 | 44 | 58 | 70 | 81 | 84 | 81 | 75 | 61 | 45 | 31 | 57 |
| Avg low °F | 8 | 11 | 24 | 35 | 47 | 58 | 62 | 59 | 51 | 38 | 25 | 13 | 36 |
| Precip in | 0.7 | 0.8 | 1.8 | 3.1 | 4.2 | 4.7 | 3.4 | 3.5 | 3.1 | 2.4 | 1.4 | 1.1 | 30.2 |
1996–2025 normals for O'Brien County — the climate division Sheldon sits in. All-time county record high 102.4°F (1988-06-22); record low -30.8°F (1970-01-19). Source: NOAA / National Weather Service.