The official National Weather Service forecast for Sidney — 47.7167°N, 104.1563°W, population 6,522, 46.5 miles from I-94.
| Richland County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 25 | 29 | 42 | 57 | 68 | 77 | 86 | 85 | 74 | 58 | 40 | 27 | 56 |
| Avg low °F | 5 | 7 | 18 | 30 | 40 | 50 | 56 | 54 | 44 | 31 | 19 | 8 | 30 |
| Precip in | 0.3 | 0.3 | 0.5 | 1.1 | 2.7 | 2.6 | 2.1 | 1.3 | 1.2 | 1.2 | 0.4 | 0.4 | 14.1 |
1996–2025 normals for Richland County — the climate division Sidney sits in. All-time county record high 109.3°F (2026-07-13); record low -43.7°F (1962-02-28). Source: NOAA / National Weather Service.