When to go · Portland, Oregon

Portland, Oregon in September

Great month. Inside Portland, Oregon's best window: Jul–mid-Oct (dry, warm); May–Jun and late Sep for fewer crowds.

Key facts

Verdict: Great
Temperature: 25°C (77°F)77°F (25°C) / 12°C (54°F)54°F (12°C); average high / low
Rain days: 7
Crowds: Medium; United States overall
Prices: Medium; United States overall

Plan around it

Verdict

GreatBest and avoid months for Portland, Oregon

Inside Portland, Oregon's best window: Jul–mid-Oct (dry, warm); May–Jun and late Sep for fewer crowds.

Is another month better than September?

No other month rates higher than September for Portland, Oregon in this guide.

Weather in September

Long-term averages

Portland, OregonHighs around 25 °C (77 °F), lows around 12 °C (54 °F), rain on about 7 daysHighs around 77 °F (25 °C), lows around 54 °F (12 °C), rain on about 7 days

Festivals and holidays

Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.

Labor Day big impact
1st Monday of September · United States
End of summer; last big road-trip weekend.

Crowds and prices

Crowds · United States overall: Medium
Prices · United States overall: Medium

United States overall: After Labor Day the crowds drop and parks stay open; Florida and the Gulf are at hurricane peak.

Compare two months

Weather, crowds and prices for any two months in Portland, Oregon, side by side.

First month

Second month

Verdict
Sep: Great
May: Great
Daytime high
Sep: 25 °C (77 °F)77 °F (25 °C)
May: 21 °C (70 °F)70 °F (21 °C)
Night low
Sep: 12 °C (54 °F)54 °F (12 °C)
May: 10 °C (50 °F)50 °F (10 °C)
Rain days
Sep: 7 (better)
May: 12
Crowds
Sep: Medium
May: Medium
Prices
Sep: Medium
May: Medium
Festivals listed
Sep: 1
May: 1

September: Inside Portland, Oregon's best window: Jul–mid-Oct (dry, warm); May–Jun and late Sep for fewer crowds.

May: Inside Portland, Oregon's best window: Jul–mid-Oct (dry, warm); May–Jun and late Sep for fewer crowds.

Portland, Oregon: figures are long-term averages from this guide, not a forecast.

What to pack

A warm layer for the evenings

Build the full packing list for your trip →

Across United States in September →