Cathlamet, WA Weather Tomorrow

Before heading out, check tomorrow's Cathlamet weather and the extended 5 day forecast featuring daily precipitation forecasts, changing sky conditions, daytime highs, overnight lows, Fahrenheit and Celsius temperatures, sunrise, sunset, wind chill, and local wind details across the Cathlamet area and around Wahkiakum county, Washington.
Updated: Fri Aug 28th 2026 10:00 AM PDT
Cathlamet, WA Weather – 8-28 – Overcast
73° / 48°
Overcast
In Cathlamet, it will be overcast with highs near 73°F and lows around 48°F. There might be light rainfall having a 14% chance. Winds will be light at 10mph and gusts of 20.1mph at 3 PM. The humidity will be on the higher side, averaging about 75%, the maximum being 99% at 10 PM and 40% being its lowest at 2 PM. Barometric pressure is its highest of 30.05inHg at 11 AM, a lowest point of 29.98inHg at 3 PM with an avg 30.01inHg.
Cathlamet, WA Weather – 8-29 – Fog
68° / 48°

Weather Tomorrow

Fog
Highs will reach 68°F with lows near 48°F in Cathlamet, where fog is. There's a moderate 44% chance of rainfall with an estimated 0.02in. Wind will be moderate, blowing around 11mph on average and gusts of 14.3mph at 10 PM. The humidity will be on the higher side, averaging about 76%, the maximum being 99% at 12 AM and 41% being its lowest at 1 PM. Barometric pressure is its highest of 30.1inHg at 10 PM, a lowest point of 30.04inHg at 3 PM with an avg 30.06inHg.
Cathlamet, WA Weather – 8-30 – Overcast
69° / 51°
Overcast
In Cathlamet, cloud-filled skies are likely with a high near 69°F and a low around 51°F. There might be light rainfall having a 18% chance with an estimated 0in. Winds will be light at 8mph and gusts of 18.3mph at 6 PM. The humidity will be on the higher side, averaging about 66%, the maximum being 96% at 11 PM and 43% being its lowest at 5 PM. Barometric pressure is its highest of 30.09inHg at 4 AM, a lowest point of 29.97inHg at 5 PM with an avg 30.03inHg.
Cathlamet, WA Weather – 8-31 – Overcast
74° / 49°
Overcast
It will be overcast in Cathlamet, with a high of 74°F and a low of 49°F. There might be light rainfall having a 19% chance. Winds will be light at 9mph and gusts of 17mph at 4 PM. The humidity will be on the higher side, averaging about 73%, the maximum being 98% at 11 PM and 31% being its lowest at 2 PM. Barometric pressure is its highest of 30.01inHg at 12 AM, a lowest point of 29.79inHg at 6 PM with an avg 29.9inHg.
Cathlamet, WA Weather – 9-1 – Fog
75° / 49°
Fog
Cathlamet is set for fog with temperatures peaking at 75°F and dipping to 49°F. There's a moderate 30% chance of rainfall with an estimated 0.01in. Wind will be moderate, blowing around 12mph on average and gusts of 16.8mph at 7 PM. The humidity will be on the higher side, averaging about 76%, the maximum being 98% at 10 PM and 39% being its lowest at 2 PM. Barometric pressure is its highest of 29.95inHg at 8 AM, a lowest point of 29.81inHg at 3 PM with an avg 29.87inHg.
Cathlamet, WA Weather – 9-2 – Light Rain Shower
56° / 48°
Light Rain Shower
In Cathlamet, rain showers are likely with a high near 56°F and a low around 48°F. The chance of rain is 94% with an estimated 0.88in. Winds will be light at 8mph and gusts of 19mph at 8 AM. High humidity with average of 97% is anticipated, the maximum being 99% at 7 AM and 95% being its lowest at 6 PM. Barometric pressure is its highest of 29.91inHg at 11 PM, a lowest point of 29.84inHg at 6 AM with an avg 29.86inHg.

Currently

Partly Cloudy 63°F
30.06 inHg.
Barometer
74%
Humidity
NW 5.4 mph
Wind
Partly Cloudy

5 Day Forecast Nearby

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