The official National Weather Service forecast for Pierre — 44.3683°N, 100.351°W, population 14,755, 31.6 miles from I-90.
| Hughes County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 29 | 33 | 46 | 58 | 70 | 81 | 88 | 86 | 78 | 62 | 46 | 32 | 59 |
| Avg low °F | 8 | 11 | 22 | 32 | 44 | 55 | 61 | 59 | 50 | 36 | 23 | 12 | 34 |
| Precip in | 0.4 | 0.5 | 0.9 | 2.0 | 3.0 | 3.2 | 2.4 | 2.4 | 1.8 | 1.5 | 0.5 | 0.6 | 19.2 |
1996–2025 normals for Hughes County — the climate division Pierre sits in. All-time county record high 111.8°F (2006-07-16); record low -35.4°F (1994-02-09). Source: NOAA / National Weather Service.