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Grass Valley, OR Weather Tomorrow

Before heading out, check tomorrow's Grass Valley weather and the extended 5 day forecast featuring precipitation potential, daytime and nighttime forecasts, temperature highs and lows in Fahrenheit and Celsius, sunrise and sunset times, cloud cover, wind chill, wind speed, and wind direction across the Grass Valley area and around Sherman county, Oregon.
Updated: Fri Nov 6th 2026 3:15 PM PST
Grass Valley, OR Weather – 11-6 – Overcast
62° / 41°
Overcast
Skies will be overcast in Grass Valley, with a high of 62°F and a low of 41°F. There might be light rainfall having a 17% chance with an estimated 0.01in. Wind will be moderate, blowing around 11mph on average and gusts of 20.6mph at 8 PM. Humidity levels should be comfortable, sitting around 42% on average, the maximum being 62% at 9 PM and 30% being its lowest at 5 PM. Barometric pressure is its highest of 30.17inHg at 7 PM, a lowest point of 30.11inHg at 4 PM with an avg 30.14inHg.
Grass Valley, OR Weather – 11-7 – Overcast
63° / 44°

Weather Tomorrow

Overcast
Grass Valley may see cloud-filled skies, with daytime highs of 63°F and overnight lows near 44°F. There's a very small chance of rainfall, only about 7%. Winds will be light at 10mph and gusts of 18.8mph at 11 PM. Humidity levels should be comfortable, sitting around 44% on average, the maximum being 69% at 1 AM and 23% being its lowest at 2 PM. Barometric pressure is its highest of 30.14inHg at 12 AM, a lowest point of 29.86inHg at 10 PM with an avg 29.99inHg.
Grass Valley, OR Weather – 11-8 – Overcast
58° / 41°
Overcast
It will be overcast in Grass Valley, with a high of 58°F and a low of 41°F. There might be light rainfall having a 17% chance with an estimated 0in. Winds will be strong at speeds peaking at 30mph and gusts of 39mph at 3 AM. Humidity levels should be comfortable, sitting around 58% on average, the maximum being 82% at 10 PM and 38% being its lowest at 12 AM. Barometric pressure is its highest of 30.23inHg at 9 PM, a lowest point of 29.87inHg at 12 AM with an avg 30.14inHg.
Grass Valley, OR Weather – 11-9 – Overcast
55° / 37°
Overcast
In Grass Valley, cloud-filled skies are likely with a high near 55°F and a low around 37°F. There might be light rainfall having a 21% chance with an estimated 0.01in. Winds will be light at 7mph and gusts of 15.9mph at 3 PM. The humidity will be on the higher side, averaging about 69%, the maximum being 85% at 4 AM and 45% being its lowest at 3 PM. Barometric pressure is its highest of 30.25inHg at 11 PM, a lowest point of 30.07inHg at 4 PM with an avg 30.16inHg.
Grass Valley, OR Weather – 11-10 – Overcast
60° / 41°
Overcast
Daytime highs will reach 60°F with lows dropping to 41°F in Grass Valley, where skies will be overcast. There's a moderate 39% chance of rainfall with an estimated 0.03in. Winds will be light at 9mph and gusts of 18.1mph at 5 AM. Humidity levels should be comfortable, sitting around 58% on average, the maximum being 76% at 1 AM and 38% being its lowest at 11 AM. Barometric pressure is its highest of 30.31inHg at 8 AM, a lowest point of 30.12inHg at 10 PM with an avg 30.22inHg.
Grass Valley, OR Weather – 11-11 – Overcast
60° / 43°
Overcast
Overcast is in the forecast for Grass Valley, with a high of 60°F and a low of 43°F. There might be light rainfall having a 14% chance. Winds will be light at 6mph and gusts of 15.4mph at 12 AM. The humidity will be on the higher side, averaging about 61%, the maximum being 74% at 10 PM and 43% being its lowest at 1 PM. Barometric pressure is its highest of 30.25inHg at 12 AM, a lowest point of 30inHg at 11 PM with an avg 30.08inHg.

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