30YearWeather
Portland in October
Portland weather in October - United States
🌤️Mild & Comfortable

Portland Weather in October

Plan your October trip to Portland, United States. Based on 30 years of NASA data, expect temperatures of 17°C (high) to 8°C (low), with 32% rain probability and 8 hours of daily sunshine. Pack rain gear for around 25 rainy days.

Avg High
17°C

Hottest around day 1

Avg Low
8°C

Coolest around day 31

Rainy Days
25days

32% avg rain chance

Sunshine
8hrs/day

Autumn season

Portland October Weather Calendar

Click any day to see detailed weather information

Currency

USD

$ United States dollar

Language

English

Driving

Right side

Safety

Moderate Safety

GPI: 2.44

Travel Intelligence

Exclusive flight analytics & health data for Portland

Smart Flight Estimator

Airport-to-Airport Logistics

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Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Well Connected
62/ 100
Traffic Index

Popular destination

Peak Daily Arrivals

0

slots per day

Peak

Aug

Low

Jan

Monthly Traffic Distribution

203
Jan
204
Feb
225
Mar
256
Apr
287
May
297
Jun
324
Jul
326
Aug
305
Sep
275
Oct
209
Nov
253
Dec
Traffic Level
Low Season

Key Connections

Seattle Tacoma (SEA)
Los Angeles (LAX)
Denver (DEN)
Phoenix Sky Harbor (PHX)
San Francisco (SFO)

Health & Safety Advisory

CDC travel health recommendations

No Requirements

No Special Vaccinations Required

Standard travel precautions apply

Source: CDC Travelers' Health

View Complete Health Guide

Is October a Good Time to Visit Portland?

👍Very good conditions overall
Short Answer

October delivers Portland's best weather - 17°C days, rare rain (32%), and comfortable 79% humidity. Book accommodation early as this is well-known as an excellent period.

Decision Factors

Near active volcano: Mount St. Helens

Medium volcanic risk

Shoulder season - balanced conditions

84% of peak - good value with moderate crowds

Good For

  • 🏛️
    Cultural tourists

    Comfortable conditions for exploring museums and sites

  • 💼
    Business travelers

    Climate-controlled meetings unaffected by weather

Who Should Avoid

  • 👴
    Elderly travelers

    79% humidity creates difficult conditions

930 observations30-year historical data
Confidence: 95%

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Portland in October averages 17°C with 32% precipitation probability."

📊 Source: 30YearWeather.com🛰️ Data: NASA POWER (1991-2021)View Methodology →

Frequently Asked Questions: Portland in October

What are the temperatures in Portland in October?

Daytime highs average 17°C, nights drop to 8°C. Temperatures remain fairly consistent.

How many rainy days in Portland in October?

Expect around 25 days with measurable rainfall. An umbrella is advisable.

What to wear in Portland in October?

Layers are key. A medium-weight jacket and closed-toe shoes.

Is October peak season in Portland?

This is shoulder season—moderate prices and manageable crowds.