Portland Weather by Month
Portland, Oregon, has a mild Pacific Northwest climate with cool, wet winters and warm, relatively dry summers. Rainfall varies significantly throughout the year, with November through January among the wettest months and July and August being the driest. Summer also brings the longest daylight hours, making June through August especially popular for outdoor activities.
Portland Weather by Month
You can click the image below to view the full-size weather chart for Portland.
January – Cool Winter Days and Heavy Rainfall
Average high: 46°F (8°C)
Average low: 37°F (3°C)
Rainfall: 5.9 inches
Rainy days: 15
Daylight: 9 hours
January is one of the coolest and wettest months in Portland. Daytime temperatures typically reach around 46°F, while mornings and evenings can feel chilly with average lows near 37°F.
Rain is common throughout the month, with about 5.9 inches of rainfall spread across approximately 15 rainy days. Snowfall can occasionally occur during cold spells, but rain is much more typical.
Best for:
- Indoor attractions and museums
- Coffee shops and restaurants
- Exploring Portland’s neighborhoods
- Quiet city breaks
- Winter sightseeing
February – Cool Temperatures and Frequent Rain
Average high: 50°F (10°C)
Average low: 39°F (4°C)
Rainfall: 4.6 inches
Rainy days: 12
Daylight: 10.5 hours
February brings slightly warmer temperatures and longer days, although Portland remains fairly wet. Average highs reach 50°F, while lows remain around 39°F.
Rainfall decreases compared with January but still averages about 4.6 inches across 12 rainy days. The longer daylight makes it easier to fit outdoor activities between periods of rain.
Best for:
- City sightseeing
- Museums and galleries
- Food and coffee tours
- Winter photography
- Weekend getaways
March – Mild Spring Weather and Moderate Rain
Average high: 55°F (13°C)
Average low: 41°F (5°C)
Rainfall: 4.6 inches
Rainy days: 14
Daylight: 12 hours
March marks the beginning of a noticeable transition toward spring. Temperatures become milder, with average highs around 55°F and lows near 41°F.
Rain remains frequent, with approximately 4.6 inches of precipitation and 14 rainy days. Despite the wet weather, Portland’s parks and gardens begin showing early signs of spring.
Best for:
- Spring sightseeing
- Parks and gardens
- Neighborhood walks
- Museums
- Early-season outdoor activities
April – Mild Spring Days and Decreasing Rainfall
Average high: 61°F (16°C)
Average low: 45°F (7°C)
Rainfall: 3.3 inches
Rainy days: 12
Daylight: 13.5 hours
April offers noticeably milder weather and much longer days. Average highs climb to 61°F, while nighttime temperatures generally remain around 45°F.
Rainfall falls to about 3.3 inches over 12 rainy days. The combination of warmer temperatures and nearly 13.5 hours of daylight makes April a good month for exploring Portland outdoors.
Best for:
- Exploring parks and gardens
- Walking tours
- Hiking
- Spring photography
- Outdoor sightseeing
May – Comfortable Spring Weather and Less Rain
Average high: 68°F (20°C)
Average low: 48°F (9°C)
Rainfall: 2.5 inches
Rainy days: 9
Daylight: 15 hours
May is one of the most comfortable months in Portland. Temperatures are pleasant, with average highs around 68°F and lows near 48°F.
Rainfall continues to decrease to approximately 2.5 inches, occurring over about nine days. With around 15 hours of daylight, May provides plenty of time for hiking, sightseeing, and exploring the city.
Best for:
- Hiking
- Parks and gardens
- Cycling
- Outdoor dining
- Day trips
June – Warm Summer Weather and Light Rainfall
Average high: 73°F (23°C)
Average low: 54°F (12°C)
Rainfall: 1.6 inches
Rainy days: 6
Daylight: 15.5 hours
June brings the start of Portland’s warm and increasingly dry summer season. Average daytime temperatures reach 73°F, while nights remain comfortable at around 54°F.
Rainfall drops significantly to about 1.6 inches, with only around six rainy days. Long daylight hours make June excellent for spending extended periods outdoors.
Best for:
- Hiking
- Cycling
- Outdoor festivals
- River activities
- Day trips
July – Warm, Dry Days and Minimal Rainfall
Average high: 81°F (27°C)
Average low: 57°F (14°C)
Rainfall: 0.5 inches
Rainy days: 2
Daylight: 15.5 hours
July is one of the warmest and driest months in Portland. Average highs reach 81°F, while nighttime temperatures are generally around 57°F.
Rainfall is extremely limited at only about 0.5 inches, with approximately two rainy days. With long daylight hours and warm temperatures, July is ideal for outdoor adventures throughout the Portland area.
Best for:
- Hiking
- Cycling
- Outdoor festivals
- Parks and gardens
- Day trips
August – Warm Summer Weather and Very Little Rain
Average high: 81°F (27°C)
Average low: 59°F (15°C)
Rainfall: 0.8 inches
Rainy days: 2
Daylight: 14 hours
August remains warm and dry, with average highs around 81°F and the year’s warmest average nighttime temperature at about 59°F.
Rainfall remains very low at approximately 0.8 inches, and rain occurs on only about two days. Although daylight begins to decrease from July, August still offers around 14 hours of daylight for outdoor activities.
Best for:
- Hiking
- Water activities
- Outdoor dining
- Exploring nearby nature
- Summer vacations
September – Warm Early Fall Days and Increasing Rain
Average high: 75°F (24°C)
Average low: 55°F (13°C)
Rainfall: 1.7 inches
Rainy days: 5
Daylight: 12.5 hours
September is often a pleasant transition month between summer and fall. Average highs remain warm at around 75°F, while lows fall to about 55°F.
Rainfall begins to increase compared with July and August, reaching about 1.7 inches over five rainy days. The weather is still comfortable for outdoor exploration, especially early in the month.
Best for:
- Hiking
- Scenic drives
- Outdoor sightseeing
- Parks
- Early fall activities
October – Mild Fall Weather and Increasing Rainfall
Average high: 63°F (17°C)
Average low: 48°F (9°C)
Rainfall: 3.5 inches
Rainy days: 9
Daylight: 11 hours
October brings cooler temperatures and a clear return to Portland’s wetter season. Average highs reach around 63°F, while nighttime temperatures fall to approximately 48°F.
Rainfall increases to about 3.5 inches over nine rainy days. Autumn colors and cooler temperatures make October an attractive month for scenic walks and exploring the surrounding countryside.
Best for:
- Fall foliage
- Scenic drives
- Hiking
- Coffee shops
- Museums and cultural attractions
November – Cool, Wet Days and Shorter Daylight
Average high: 52°F (11°C)
Average low: 41°F (5°C)
Rainfall: 6.1 inches
Rainy days: 15
Daylight: 9.5 hours
November is one of Portland’s wettest months. Average highs are around 52°F, while lows drop to approximately 41°F.
Rainfall reaches about 6.1 inches, with rain occurring on roughly 15 days. Daylight also decreases to about 9.5 hours, so visitors should plan for wet conditions and shorter afternoons.
Best for:
- Museums
- Restaurants and food experiences
- Coffee shops
- Indoor attractions
- Cozy weekend trips
December – Cool Winter Weather and the Year’s Highest Rainfall
Average high: 46°F (8°C)
Average low: 37°F (3°C)
Rainfall: 6.7 inches
Rainy days: 15
Daylight: 9 hours
December is the wettest month in Portland, with approximately 6.7 inches of rainfall and around 15 rainy days. Temperatures remain cool, with average highs of 46°F and lows around 37°F.
With only about nine hours of daylight, December offers the shortest days of the year. While rain is common, the city’s restaurants, cafes, museums, and holiday events provide plenty of indoor options.
Best for:
- Holiday events
- Museums and galleries
- Coffee shops
- Restaurants
- Cozy winter getaways
Portland Weather by Month at a Glance
| Month | Avg High °F (°C) | Avg Low °F (°C) | Rainfall (inches) | Sun (hrs/day) | Snowfall (inches) |
|---|---|---|---|---|---|
| January | 46°F (8°C) | 37°F (3°C) | 5.9 | 9 | 1.3 |
| February | 50°F (10°C) | 39°F (4°C) | 4.6 | 10.5 | 1.2 |
| March | 55°F (13°C) | 41°F (5°C) | 4.6 | 12 | 0.1 |
| April | 61°F (16°C) | 45°F (7°C) | 3.3 | 13.5 | 0.0 |
| May | 68°F (20°C) | 48°F (9°C) | 2.5 | 15 | 0.0 |
| June | 73°F (23°C) | 54°F (12°C) | 1.6 | 15.5 | 0.0 |
| July | 81°F (27°C) | 57°F (14°C) | 0.5 | 15.5 | 0.0 |
| August | 81°F (27°C) | 59°F (15°C) | 0.8 | 14 | 0.0 |
| September | 75°F (24°C) | 55°F (13°C) | 1.7 | 12.5 | 0.0 |
| October | 63°F (17°C) | 48°F (9°C) | 3.5 | 11 | 0.0 |
| November | 52°F (11°C) | 41°F (5°C) | 6.1 | 9.5 | 0.2 |
| December | 46°F (8°C) | 37°F (3°C) | 6.7 | 9 | 0.8 |
Portland Weather Overview
Portland’s weather changes considerably throughout the year. Winter is cool and rainy, with December, January, and November receiving the most rainfall. Spring becomes progressively warmer and drier, while summer is warm, sunny, and remarkably dry.
July and August are the driest months, with only about 0.5 to 0.8 inches of rainfall. They are also among the warmest months, with average highs of 81°F. For visitors who prefer mild temperatures and fewer rainy days, May, June, September, and early October can offer an excellent balance of comfortable weather and outdoor opportunities.
If your priority is warm, dry weather, July and August are the best months to visit Portland. If you prefer cooler temperatures, fewer crowds, and spring or fall scenery, April, May, September, and October are good alternatives.
20 FAQs About Portland Weather
1. What is the weather like in Portland, Oregon?
Portland has a mild climate with cool, rainy winters and warm, dry summers. Rain is most common from late fall through winter, while July and August are typically the driest months.
2. What is the best month to visit Portland?
May, June, September, and early October are excellent months to visit because temperatures are generally comfortable and rainfall is lower than during winter.
3. What is the hottest month in Portland?
July and August are typically the hottest months, with average high temperatures around 81°F (27°C).
4. What is the coldest month in Portland?
January and December are among the coolest months, with average highs around 46°F (8°C) and average lows near 37°F (3°C).
5. Does it rain a lot in Portland?
Yes. Portland receives frequent rainfall, particularly from October through March. December is the wettest month in the provided data, with about 6.7 inches of rainfall.
6. What is the rainiest month in Portland?
December is the wettest month, averaging approximately 6.7 inches of rainfall and around 15 rainy days.
7. What is the driest month in Portland?
July is the driest month, with only about 0.5 inches of rainfall and approximately 2 rainy days.
8. Does Portland get snow?
Yes, but significant snowfall is relatively uncommon in the city. Snow is most likely during winter, particularly in January and February, while summer has virtually no snowfall.
9. What is Portland weather like in January?
January is cool and wet, with an average high of 46°F (8°C), an average low of 37°F (3°C), and about 5.9 inches of rainfall.
10. What is Portland weather like in summer?
Summer is warm, dry, and sunny compared with the rest of the year. July and August have average highs around 81°F (27°C) and very little rainfall.
11. Is Portland hot in July?
July is warm rather than extremely hot. Average daytime temperatures reach about 81°F (27°C), while nighttime temperatures average around 57°F (14°C).
12. Is August a good time to visit Portland?
Yes. August is one of the best months for outdoor activities because temperatures are warm, rainfall is very low, and there are around 14 hours of daylight.
13. What is Portland weather like in spring?
Spring temperatures gradually increase from cool to mild. March averages about 55°F (13°C), while May reaches around 68°F (20°C). Rainfall also decreases as spring progresses.
14. What is Portland weather like in fall?
Fall starts mild and gradually becomes cooler and wetter. September has an average high of 75°F (24°C), while October falls to 63°F (17°C) and November to 52°F (11°C).
15. What month has the most daylight in Portland?
June and July have the longest daylight periods, at approximately 15.5 hours per day.
16. What month has the least daylight in Portland?
January and December have the shortest daylight periods, with about 9 hours per day.
17. Is Portland weather humid?
Portland can feel damp because of its frequent rainfall and generally moist climate, especially during the cooler months. Summers are usually much more comfortable and dry.
18. What should I wear in Portland in winter?
Layers, a waterproof jacket, comfortable waterproof shoes, and warm clothing are useful. Winter temperatures are generally cool rather than extremely cold, but frequent rain can make conditions feel colder.
19. What is the best month for outdoor activities in Portland?
July and August are excellent for hiking, cycling, parks, and day trips because they combine warm temperatures with very little rainfall. May, June, and September are also good choices if you prefer milder temperatures.
20. When is the best time to visit Portland for good weather?
For warm, dry weather, July and August are the best choices. For a balance of pleasant temperatures, fewer rainy days, and comfortable outdoor conditions, May, June, and September are also excellent options.
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