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Parks / Olympic

When to visit
Olympic.

Busiest monthAugust682K visits
Quietest monthDecember86K visits
Warmest monthAugust67°F average high
Wettest monthNovember20.1" of precipitation

The park drew an average of 3.1M recreation visits a year over 2016–2025. August is the busiest month at 22% of the year's visits, and December the quietest — 7.9× fewer people.

Crowds

August averages 681,950 recreation visits against 85,782 in December. Visit counts are the National Park Service's own monthly totals for the whole park, so unlike the weather figures below they describe every entrance and every trailhead at once.

Conditions through the year

August is the warmest month at 4,252 feet, averaging a daily high of 67°F, and February the coldest at 31°F with lows near 20°F. November is the wettest at 20.1 inches, July the driest at 1.3.

Daylight runs from 8h 30m in December to 15h 54m in June, a difference of 7h 24m of usable time in a day.

Snow shows up in every month except July, August and September. That is snowfall at the grid cell, not road or trail status — parks close roads on their own schedule and conditions, and the park's own alerts are the only authority on what is open.

Read the temperatures this way

Those temperatures come from a reanalysis grid cell centred at 4,252 feet. A park that spans a range of elevations is warmer in some places and colder in others than one cell can show, and most parks span a wide one. Read the month-to-month shape — which months run warm, wet or snowy relative to each other — rather than any single figure as the temperature you will meet at a given trailhead.

Every month

MonthHighLowWet days Snow daysDaylightVisits
January 33° 23° 20 16 8h 54m 87,504
February 31° 20° 20 17 10h 18m 91,051
March 35° 22° 19 16 12h 0m 125,179
April 40° 26° 17 13 13h 42m 140,616
May 50° 31° 13 4 15h 12m 260,867
June 57° 37° 12 1 15h 54m 361,415
July 65° 44° 5 0 15h 30m 510,072
August 67° 46° 6 0 14h 12m 681,950
September 60° 41° 11 0 12h 30m 400,192
October 48° 32° 16 4 10h 48m 219,242
November 38° 26° 20 12 9h 18m 140,380
December 32° 22° 21 17 8h 30m 85,782

Averages over 10 years, 2016–2025. Wet days count days with at least 0.04″ of precipitation; snow days at least 0.4″ of snowfall.

There is no best month here

This page does not pick one. Crowds and weather alone cannot: in the desert parks the emptiest months are empty because the heat is dangerous, and in the mountain parks the quietest ones are quiet because the roads are shut. What a month has usually been like and what it will be like on your date are also different claims — for the second, the planner reads the live seven-day forecast and the park's own notices.

ParkReady is independent and is not affiliated with the National Park Service. Road, trail and campground status comes from the park, and the park is the only authority on it.

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