| NWS Forecast for: Grass Valley OR Issued by: National Weather Service Pendleton, OR Last Update: 8:57 am PDT Sep 6, 2026 |  |
| Today: Showers, mainly before 11am. High near 63. Northwest wind 6 to 8 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible. Tonight: Partly cloudy, with a low around 47. West wind 5 to 10 mph, with gusts as high as 21 mph. Labor Day: Sunny, with a high near 66. Southwest wind 9 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph. Monday Night: Mostly clear, with a low around 46. Northwest wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 20 mph. Tuesday: Sunny, with a high near 72. Calm wind becoming northeast around 6 mph in the afternoon. Tuesday Night: Mostly clear, with a low around 53. Wednesday: Sunny, with a high near 79. Wednesday Night: Mostly clear, with a low around 56. Thursday: Sunny, with a high near 79. Thursday Night: Mostly clear, with a low around 52. Friday: Sunny, with a high near 68. Friday Night: Partly cloudy, with a low around 49. Saturday: Sunny, with a high near 66. | |
| Grass Valley OR 45.35°N 120.79°W (Elev. 2300 ft) | |
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