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Thornton Weather Forecast 48 Hour Graphical Forecast |
| WEATHER STORY Portland Weather Forecast Office |
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🌡️ An Extreme Heat Warning & Heat Advisory have been issued from Sunday, June 14th through Tuesday, June 16th.
Update: Heat Advisory now includes the coast on Sunday, June 14th.
Daytime temperatures from 92°F to 100°F with overnight lows of 63°F to 67°F are expected to impact the majority of the Willamette Valley from Sunday, June 14th through Tuesday June 16th, 2026.
The Extreme Heat Warning is for the Greater Portland-Vancouver Metro, Western Columbia River Gorge, and Chehalem Mountains.
The Heat Advisory is for all locations except for the Cascades, the Greater Portland-Vancouver, and Western Columbia River Gorge.
Now is the time to prepare for hot temperatures!
🧢 Have sunscreen & light-colored, loose-fitted clothing
🥵 Avoid strenuous outdoor activities during the hottest part of the day if possible
💨 Find locations with air conditioning
⚠️ Beware of cold water shock: wear a life jacket when swimming in local rivers and lakes
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Data Courtesy of Portland Weather Forecast Office
