Early autumn · Weather & things to do
Olympic NP in September
Olympic NP cools off: highs slip to 53°F (12°C), from 59°F in August, with lows of 39°F (4°C) and about 3.4 in (86 mm) of rain.
It scores 69/100 for comfort, 3rd of 12, which makes it a solid shoulder-season month.
- Avg high
- 53°F (12°C)
- Avg low
- 39°F (4°C)
- Rain
- 3.4 in (86 mm)
- Humidity
- 82%
- Cloud cover
- 53%
- Daylight
- ~12 h 20 min
- Comfort score
- 69/100 · Good
What September feels like
Afternoons only reach about 53°F (12°C), so plan on a warm jacket.
Lows average 39°F (4°C).
Showers are part of the month, adding up to about 3.4 in (86 mm).
Plan around September
September is shoulder season: good weather, a step below the best months (July & August).
- Last dry month before the rain picks up: October brings 7.8 in (198 mm).
- Comfort slips from 85/100 in August to 69/100.
- September sits inside the Jun – Sep window our Pacific Northwest route recommends.
What to pack for September
- Insulated jackethighs only 53°F
- Packable rain jacket or umbrellaabout 3.4 in of rain
- Comfortable walking shoesmost places below are best reached on foot or with short walks
What to do in Olympic NP in September
With conditions on your side, the picks below favor time outside.
Hurricane Ridge
Paved road to subalpine meadows with views across the Olympic range and Strait of Juan de Fuca.
Why now Our curated notes say it's best Jul–Sep.
Sol Duc Falls
Short forest walk to a waterfall splitting into channels in a narrow gorge.
Why now September scores 69/100 for comfort, good conditions for being outside.
Lake Crescent Lodge
Historic 1915 lodge whose dining room serves Northwest dishes with lake views.
Why now Highs near 53°F and 3.4 in of monthly rain make this an easy outdoor pick.
Marymere Falls Trail
Easy 1.8-mile round trip through old-growth forest to a 90-foot waterfall.
Why now One to do outside while the weather is on your side.
Next Door Gastropub
Port Angeles gastropub with Northwest taps and burgers, a good base-camp dinner.
Nearby in September
- Victoria in September~45 mi · highs 65°F, 2.0 in rain · 6°C (11°F) warmer by day, drier
- Bainbridge Island in September~52 mi · highs 69°F, 2.3 in rain · 9°C (16°F) warmer by day, drier
- San Juan Island in September~57 mi · highs 65°F, 2.0 in rain · 6°C (11°F) warmer by day, drier
- Seattle in September~61 mi · highs 69°F, 2.3 in rain · 9°C (16°F) warmer by day, drier
NASA POWER 2001–2025 monthly averages on a ~50 km grid, temperatures adjusted from the grid cell's ~664 m to Olympic NP's ~1,317 m elevation (standard lapse rate). Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Olympic NP in September: quick answers
Is September a good time to visit Olympic NP?
It's a good shoulder-season choice, scoring 69/100 against a best of 85 in July & August. Expect highs of 53°F (12°C) and 3.4 in (86 mm) of rain. September is inside the Jun – Sep window our Pacific Northwest route recommends.
How cold is Olympic NP in September?
Average highs are 53°F (12°C) and average lows 39°F (4°C), making it the 3rd-warmest month by daytime highs.
Does it rain a lot in Olympic NP in September?
Some: about 3.4 in (86 mm) of rain falls across September on average, the 4th-driest month of the year. The annual total is about 73.9 in (1877 mm).
What should I pack for Olympic NP in September?
Bring insulated jacket (highs only 53°F), packable rain jacket or umbrella (about 3.4 in of rain) and comfortable walking shoes (most places below are best reached on foot or with short walks).
More on Olympic NP
Routes in season in September
- Pacific Northwest Jun – Sep
Planning Olympic NP in September?
Plan it together in TripsCircle: one itinerary, one shared packing list and costs split as you go.