Portland Weather in October

Portland in October averages 18°C (64°F) during the day and 8°C (46°F) at night. Keep in mind that quite a bit of rainfall is expected this month.

Rainfall in Portland in October

Rain is expected on roughly 14 days, totalling around 86 mm (3.4 in) for the month. Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.

Temperature in Portland in October

October in Portland brings moderate temperatures, with highs of 18°C (64°F) and nights around 8°C (46°F). Conditions are often most pleasant around the middle of the day. With lows around 8°C (46°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.

Sunshine in Portland in October

The area enjoys a moderate level of sunlight, with around 152 hours. It's a good balance between sunny and cloudy days.

Wind Speed in Portland in October

October sees wind speeds averaging 2 m/s (4 knots). You'll typically experience pleasant light breezes that move leaves slightly and feel refreshing. As an average, expect variation from very calm days to periods with more apparent air movement.

Should you favor a climate that's both dry and comfortably warm, May, June, July, August and September typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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For a detailed overview over the year and the best time to visit the United States of America, check out our Portland's climate page.

Portland Temperature in October

Min Temperature 8°C (46°F)  

Max Temperature 18°C (64°F)  

Chance of Rain 47%  

Precipitation 86 mm (3.4 in)  

Rainy days 14 days  

Humidity 78%  

Windspeed 2 m/s (4 knots)  

Sunshine 152 hours  

Percentage Sunshine  

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Portland typically drop from around 21°C (70°F) at the start of October to approximately 14°C (57°F) by the end. Nights are cool, with lows typically ranging from 7°C (45°F) to 11°C (52°F).

Average temperatures in October

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Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in October

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Historical weather for Portland in October

Browse day-by-day weather records for Portland spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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‹ January February March April May June July August September October November December ›

Portland historical weather extremes in October

Our historical data for Portland spans 1976 to 2025, revealing these weather extremes.

• The hottest October day on record in Portland reached 31°C (88°F) (October 5, 1980).
• The lowest daytime temperature in October was 6°C (43°F), recorded on October 28, 1991.
• The coldest night in October in Portland was on October 30, 1991, with a minimum of -2°C (28°F).

What to Wear in Portland in October

Comfortable temperatures call for an easy wardrobe in October. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Portland in October

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Cycling

6/10

Walking

6/10

Barbeque

6/10

Camping

4/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Portland's climate page.

More climate data for Portland

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Portland climate overview or explore weather in the United States of America.