City in Oregon, United States
Portland weather by month and the best time to visit
When to go to Portland
Jul–Sep is dry and sunny. Oct–May is mild, grey and rainy. Wildfire smoke can hit in Aug–Sep; summer is peak season.
Portland weather by month
Average daily high, rainfall and conditions.
- Jan8°216 mm
- Feb9°144 mm
- Mar12°178 mm
- Apr15°119 mm
- May19°79 mm
- Jun22°55 mm
- Jul28°11 mm
- Aug29°20 mm
- Sep25°57 mm
- Oct18°137 mm
- Nov11°217 mm
- Dec7°251 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | 8°C47°F | 2°C36°F | 216 mm | 92% | Rainy |
| February | 9°C49°F | 2°C36°F | 144 mm | 89% | Cold |
| March | 12°C54°F | 4°C39°F | 178 mm | 87% | Rainy |
| April | 15°C59°F | 5°C42°F | 119 mm | 84% | Cool |
| May | 19°C66°F | 9°C47°F | 79 mm | 82% | Pleasant |
| June | 22°C72°F | 11°C52°F | 55 mm | 80% | Pleasant |
| July | 28°C82°F | 13°C56°F | 11 mm | 70% | Pleasant |
| August | 29°C84°F | 14°C56°F | 20 mm | 65% | Pleasant |
| September | 25°C77°F | 11°C52°F | 57 mm | 68% | Pleasant |
| October | 18°C64°F | 8°C46°F | 137 mm | 80% | Cool |
| November | 11°C52°F | 4°C40°F | 217 mm | 89% | Rainy |
| December | 7°C45°F | 2°C35°F | 251 mm | 92% | Rainy |
Best months across United States
| Place | Best months | Warmest month |
|---|---|---|
| New York City | Apr–Jun, Sep–Oct | Jul (26°C) |
| Las Vegas | Mar–May, Oct–Nov | Jul (42°C) |
| Los Angeles | Mar–May, Sep–Nov | Aug (32°C) |
| Orlando | Feb–Apr, Nov | May (31°C) |
| Miami | Nov–Apr | Aug (30°C) |
| San Francisco | Apr–May, Sep–Oct | Sep (24°C) |
| Honolulu | Apr–Jun, Sep–Oct | Sep (28°C) |
| Washington, D.C. | Mar–May, Sep–Oct | Jul (31°C) |
| Chicago | May–Jun, Sep–Oct | Jul (25°C) |
| Boston | May–Jun, Sep–Oct | Jul (28°C) |
| New Orleans | Feb–Apr, Oct–Nov | Jul (30°C) |
| San Diego | Apr–May, Sep–Nov | Aug (32°C) |
| Seattle | Jun–Sep | Aug (24°C) |
| Maui | Apr–May, Sep–Oct | Sep (22°C) |
| Nashville | Apr–May, Sep–Oct | Aug (32°C) |
| Austin | Mar–May, Oct–Nov | Aug (36°C) |
| Miami Beach | Nov–Apr | Aug (30°C) |
| Key West | Dec–Apr | Aug (30°C) |
| Denver | May–Jun, Sep–Oct | Jul (33°C) |
| Philadelphia | Apr–May, Sep–Oct | Jul (30°C) |
| Portland | Jun–Sep | Aug (29°C) |
| Atlanta | Mar–May, Oct–Nov | Jul (32°C) |
| San Antonio | Mar–May, Oct–Nov | Aug (36°C) |
| Charleston | Mar–May, Oct–Nov | Jul (32°C) |
| Savannah | Mar–May, Oct–Nov | Jul (33°C) |
| Fort Lauderdale | Dec–Apr | Aug (30°C) |
| Kauai | Apr–Jun, Sep–Oct | Sep (27°C) |
| Big Island | Apr–Jun, Sep–Oct | Aug (26°C) |
| Sedona | Mar–May, Sep–Nov | Jul (35°C) |
| Scottsdale | Feb–Apr, Oct–Nov | Jul (42°C) |
Quick answers
What is the best month to visit Portland?
Jun–Sep. Jul–Sep is dry and sunny. Oct–May is mild, grey and rainy. Wildfire smoke can hit in Aug–Sep; summer is peak season.
When is the rainy season in Portland?
Rain peaks in December with about 251 mm. Months with 150 mm or more: Mar, Nov–Jan.
What is the hottest month in Portland?
August, with average highs of 29°C (84°F).
How cold does Portland get?
The coolest nights are in December, averaging 2°C (35°F).
More about Portland
Going to Portland solo?
SoloSquare is where travelers, nomads and locals in Portland meet up for small plans: coffee, dinners, walks and day trips. Join one, or start your own in a minute.
Sources
Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Temperatures are adjusted by 1.6°C for the city's elevation. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.