The official National Weather Service forecast for Grand View — 42.9896°N, 116.0934°W, 20.8 miles from I-84. Forecasts here are written by NWS BOI, this county’s forecast office.
| Owyhee County | J | F | M | A | M | J | J | A | S | O | N | D | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 39 | 42 | 50 | 57 | 66 | 77 | 89 | 86 | 77 | 62 | 48 | 39 | 61 |
| Avg low °F | 21 | 22 | 28 | 32 | 39 | 47 | 55 | 53 | 45 | 35 | 26 | 21 | 35 |
| Precip in | 1.4 | 1.0 | 1.2 | 1.3 | 1.6 | 0.9 | 0.3 | 0.3 | 0.6 | 0.9 | 1.0 | 1.6 | 12.1 |
1996–2025 normals for Owyhee County — the climate division Grand View sits in. All-time county record high 104.9°F (2002-07-13); record low -26.2°F (1990-12-23). Source: NOAA / National Weather Service.