| NWS Forecast for: Grass Valley OR Issued by: National Weather Service Pendleton, OR Last Update: 3:01 pm PDT Sep 10, 2026 | |
| Tonight: Patchy blowing dust before 11pm. Cloudy during the early evening, then clearing, with a low around 46. Northwest wind 13 to 18 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 31 mph. Friday: Increasing clouds, with a high near 68. Southwest wind 5 to 8 mph becoming northwest in the afternoon. Friday Night: Cloudy, with a low around 48. Northwest wind 5 to 8 mph becoming calm in the evening. Winds could gust as high as 18 mph. Saturday: Partly sunny, with a high near 65. Calm wind becoming north 5 to 9 mph in the morning. Winds could gust as high as 18 mph. Saturday Night: Showers likely. Mostly cloudy, with a low around 46. West wind 11 to 20 mph, with gusts as high as 38 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible. Sunday: A 20 percent chance of showers before 11am. Partly sunny, with a high near 61. Sunday Night: Mostly clear, with a low around 43. Monday: Sunny, with a high near 65. Monday Night: Mostly clear, with a low around 46. Tuesday: Sunny, with a high near 68. Tuesday Night: Mostly clear, with a low around 48. Wednesday: Sunny, with a high near 72. Wednesday Night: Mostly clear, with a low around 50. Thursday: Sunny, with a high near 74. | |
| Grass Valley OR 45.35°N 120.79°W (Elev. 2300 ft) | |
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