Columbia County, WA Weather Tomorrow

Tomorrow's weather forecast for Columbia County is supported by a complete 5 day outlook covering precipitation probability, daily and nightly weather conditions, high and low temperature trends, sunrise and sunset information, sky cover, wind speed, wind direction, and wind chill for the Columbia County area.
Updated: Fri Aug 28th 2026 9:30 AM PDT
Columbia County, WA Weather – 8-28 – Sunny
76° / 55°
Sunny
In Columbia County, bright and sunny conditions with highs near 76°F and lows around 55°F. There's a very small chance of rainfall, only about 1%. Wind will be moderate, blowing around 14mph on average and gusts of 24.6mph at 11 PM. Humidity levels should be comfortable, sitting around 40% on average, the maximum being 47% at 10 AM and 20% being its lowest at 3 PM. Barometric pressure is its highest of 29.95inHg at 10 AM, a lowest point of 29.8inHg at 6 PM with an avg 29.86inHg.
Columbia County, WA Weather – 8-29 – Sunny
67° / 53°

Weather Tomorrow

Sunny
In Columbia County, sunshine is likely with a high near 67°F and a low around 53°F. There's a very small chance of rainfall, only about 2%. Winds will be strong at speeds peaking at 24mph and gusts of 31.2mph at 1 AM. Humidity levels should be comfortable, sitting around 40% on average, the maximum being 61% at 6 AM and 22% being its lowest at 5 PM. Barometric pressure is its highest of 29.96inHg at 11 PM, a lowest point of 29.85inHg at 12 AM with an avg 29.91inHg.
Columbia County, WA Weather – 8-30 – Sunny
66° / 51°
Sunny
Sunshine is in the forecast for Columbia County, with a high of 66°F and a low of 51°F. There's a very small chance of rainfall, only about 2%. Wind will be moderate, blowing around 18mph on average and gusts of 21.3mph at 6 AM. Humidity levels should be comfortable, sitting around 40% on average, the maximum being 62% at 4 AM and 20% being its lowest at 4 PM. Barometric pressure is its highest of 29.99inHg at 3 AM, a lowest point of 29.86inHg at 6 PM with an avg 29.94inHg.
Columbia County, WA Weather – 8-31 – Smoky Haze
77° / 60°
Smoky Haze
Columbia County could see smoky Haze with daytime highs of 77°F and nighttime lows near 60°F. There's a very small chance of rainfall, only about 2%. Winds will be light at 10mph and gusts of 18.3mph at 3 PM. Humidity levels should be comfortable, sitting around 34% on average, the maximum being 53% at 6 AM and 18% being its lowest at 3 PM. Barometric pressure is its highest of 29.93inHg at 12 AM, a lowest point of 29.67inHg at 5 PM with an avg 29.82inHg.
Columbia County, WA Weather – 9-1 – Overcast
78° / 61°
Overcast
Overcast is in the forecast for Columbia County, with a high of 78°F and a low of 61°F. There's a very small chance of rainfall, only about 4%. Wind will be moderate, blowing around 18mph on average and gusts of 33.6mph at 11 PM. Humidity levels should be comfortable, sitting around 34% on average, the maximum being 45% at 6 AM and 22% being its lowest at 2 PM. Barometric pressure is its highest of 29.82inHg at 8 AM, a lowest point of 29.63inHg at 5 PM with an avg 29.71inHg.
Columbia County, WA Weather – 9-2 – Overcast
62° / 48°
Overcast
Columbia County may see overcast, with daytime highs of 62°F and overnight lows near 48°F. Rainfall predicted to have a 51% chance with an estimated 0.03in. Wind will be moderate, blowing around 20mph on average and gusts of 31.5mph at 12 AM. The humidity will be on the higher side, averaging about 64%, the maximum being 88% at 8 PM and 46% being its lowest at 12 AM. Barometric pressure is its highest of 29.86inHg at 5 PM, a lowest point of 29.75inHg at 12 AM with an avg 29.82inHg.

Currently

Sunny 65°F
29.96 inHg.
Barometer
53%
Humidity
SW 16.6 mph
Wind
Sunny

5 Day Forecast Nearby

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