Best Time to Visit Portland
United States · 30-year monthly climate averages
☀️ When to go
Based on 30 years of climate data, the most comfortable months to visit Portland are June, July and September, when daytime temperatures are agreeable and rainfall is relatively low.
Climate profile
Portland sees its warmest weather in August, when daytime highs average around 28°C, and its coolest in December (around 8°C).
Annual precipitation totals roughly 937mm — December is typically the wettest month (~147mm) and July the driest (~13mm).
A distinctly wetter period runs from November to January — worth planning around if you prefer dry days.
Year at a glance
🟧 avg daytime high · 🟦 dashed: avg nighttime low · bars: monthly rainfall
🔥 Recent heat vs normal
Daily forecast highs vs the 30-year normal — last 36 days
Each bar is one day: orange above normal, blue below.
Month by month
| Month | High / Low | Rainfall | Travel rating |
|---|---|---|---|
| January | 9° / 2°C | 128mm | ⚠️ Challenging |
| February | 11° / 3°C | 94mm | 🤔 Fair |
| March | 14° / 4°C | 101mm | 🤔 Fair |
| April | 17° / 7°C | 73mm | 👍 Good |
| May | 21° / 10°C | 64mm | 🌟 Great |
| June | 24° / 12°C | 41mm | 🌟 Great |
| July | 28° / 15°C | 13mm | 🌟 Great |
| August | 28° / 15°C | 14mm | 🌟 Great |
| September | 25° / 12°C | 39mm | 🌟 Great |
| October | 18° / 8°C | 87mm | 👍 Good |
| November | 12° / 5°C | 139mm | ⚠️ Challenging |
| December | 8° / 2°C | 147mm | ⚠️ Challenging |
FAQ
- What is the best time to visit Portland?
- Based on 30 years of climate data, the most comfortable months to visit Portland are June, July and September, when daytime temperatures are agreeable and rainfall is relatively low.
- What is the hottest month in Portland?
- August is typically the hottest month in Portland, with average daytime highs around 28°C.
- What is the rainiest month in Portland?
- December is usually the wettest month, with around 147mm of precipitation.