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Issaquah, WA Weather Tomorrow

Use tomorrow's Issaquah weather forecast and the next 5 day outlook to track 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 for the Issaquah area and around King county, Washington.
Updated: Wed Aug 12th 2026 12:15 AM PDT
Issaquah, WA Weather – 8-12 – Sunny
79° / 58°
Sunny
Issaquah could see a sunny day with daytime highs of 79°F and nighttime lows near 58°F. There's a very small chance of rainfall, only about 6%. Winds will be light at 6mph and gusts of 8mph at 8 PM. The humidity will be on the higher side, averaging about 65%, the maximum being 87% at 4 AM and 42% being its lowest at 3 PM. Barometric pressure is its highest of 30.04inHg at 2 AM, a lowest point of 29.87inHg at 6 PM with an avg 29.96inHg.
Issaquah, WA Weather – 8-13 – Sunny
86° / 52°

Weather Tomorrow

Sunny
Daytime highs will reach 86°F with lows dropping to 52°F in Issaquah, where bright and sunny conditions. There's a very small chance of rainfall, only about 5%. Winds will be light at 7mph and gusts of 8.5mph at 8 PM. The humidity will be on the higher side, averaging about 65%, the maximum being 96% at 6 AM and 33% being its lowest at 4 PM. Barometric pressure is its highest of 29.92inHg at 7 AM, a lowest point of 29.77inHg at 6 PM with an avg 29.85inHg.
Issaquah, WA Weather – 8-14 – Sunny
85° / 59°
Sunny
Highs will reach 85°F with lows near 59°F in Issaquah, where sunshine is. There's a moderate 41% chance of rainfall with an estimated 0.03in. Winds will be light at 5mph and gusts of 5.2mph at 3 AM. The humidity will be on the higher side, averaging about 69%, the maximum being 95% at 7 AM and 36% being its lowest at 5 PM. Barometric pressure is its highest of 29.96inHg at 11 PM, a lowest point of 29.84inHg at 12 AM with an avg 29.9inHg.
Issaquah, WA Weather – 8-15 – Sunny
85° / 54°
Sunny
Issaquah is set for a sunny day with temperatures peaking at 85°F and dipping to 54°F. There might be light rainfall having a 17% chance with an estimated 0.01in. Winds will be light at 4mph and gusts of 8.5mph at 8 PM. The humidity will be on the higher side, averaging about 66%, the maximum being 94% at 6 AM and 35% being its lowest at 4 PM. Barometric pressure is its highest of 30.05inHg at 9 AM, a lowest point of 29.95inHg at 6 PM with an avg 30inHg.
Issaquah, WA Weather – 8-16 – Sunny
84° / 52°
Sunny
A sunny day is in the forecast for Issaquah, with a high of 84°F and a low of 52°F. There's a very small chance of rainfall, only about 5% with an estimated 0in. Winds will be light at 5mph and gusts of 8.9mph at 8 PM. The humidity will be on the higher side, averaging about 64%, the maximum being 91% at 6 AM and 33% being its lowest at 5 PM. Barometric pressure is its highest of 30.09inHg at 8 AM, a lowest point of 29.97inHg at 5 PM with an avg 30.04inHg.
Issaquah, WA Weather – 8-17 – Sunny
86° / 55°
Sunny
Issaquah is set for a sunny day with temperatures peaking at 86°F and dipping to 55°F. There's a very small chance of rainfall, only about 4%. Winds will be light at 7mph and gusts of 9.9mph at 8 PM. Humidity levels should be comfortable, sitting around 60% on average, the maximum being 89% at 5 AM and 25% being its lowest at 5 PM. Barometric pressure is its highest of 30.11inHg at 9 AM, a lowest point of 30inHg at 5 PM with an avg 30.06inHg.

Currently

Clear 70°F
30.04 inHg.
Barometer
56%
Humidity
E 4 mph
Wind
Clear

5 Day Forecast Nearby

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