Late spring · Weather & things to do
Snoqualmie Pass in May
Snoqualmie Pass warms up: highs climb to 55°F (13°C), from 43°F in April, with lows of 39°F (4°C) and about 4.0 in (101 mm) of rain.
Our comfort score puts it mid-table at 65/100, 5th of 12.
- Avg high
- 55°F (13°C)
- Avg low
- 39°F (4°C)
- Rain
- 4.0 in (101 mm)
- Humidity
- 84%
- Cloud cover
- 65%
- Daylight
- ~14 h 54 min
- Comfort score
- 65/100 · Good
What May feels like
Afternoons only reach about 55°F (13°C), so plan on a warm jacket.
After dark, temperatures fall to about 39°F (4°C).
Some rain is likely, about 4.0 in (101 mm) in the month, so pack for a shower or two.
Plan around May
May sits mid-table; the best months are July – September.
- The year's biggest warm-up: highs jump 7°C (12°F) from April.
- Comfort improves from 40/100 in April to 65/100.
- Our Seattle, Snoqualmie Pass & Leavenworth route is planned for Late Nov – Dec, a window set by the holiday season rather than the weather — May falls outside it.
What to pack for May
- Insulated jackethighs only 55°F
- Packable rain jacket or umbrellaabout 4.0 in of rain
- Comfortable walking shoesmost picks involve some walking
What to do in Snoqualmie Pass in May
With conditions on your side, the picks below favor time outside.
Snoqualmie Falls
A 268-foot waterfall on the Snoqualmie River, running at full force in the wet winter months.
Why now May scores 65/100 for comfort, good conditions for being outside.
Northwest Railway Museum
Railway museum based in the 1890 Snoqualmie Depot, running its Santa Train to the falls on December weekends.
Gold Creek Pond
Flat snowshoe loop around a mountain pond on the east side of the pass, reached from the Gold Creek Sno-Park.
Why now Highs near 55°F and 4.0 in of monthly rain make this an easy outdoor pick.
The Summit at Snoqualmie
Four ski areas at the top of I-90, the closest skiing to Seattle, with one of the largest night-skiing operations in the country.
Why now One to do outside while the weather is on your side.
Nearby in May
- Leavenworth in May~37 mi · highs 68°F, 2.0 in rain · 7°C (13°F) warmer by day, drier
- Seattle in May~45 mi · highs 64°F, 2.8 in rain · 5°C (9°F) warmer by day, drier
- Bainbridge Island in May~54 mi · highs 64°F, 2.8 in rain · 5°C (9°F) warmer by day, drier
- Olympic NP in May~105 mi · highs 48°F, 3.4 in rain · 4°C (7°F) cooler by day, drier
NASA POWER 2001–2025 monthly averages on a ~50 km grid, temperatures adjusted from the grid cell's ~1,198 m to Snoqualmie Pass's ~923 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.
Snoqualmie Pass in May: quick answers
Is May a good time to visit Snoqualmie Pass?
It's middling, scoring 65/100. The best months are July – September, at up to 98. Expect highs of 55°F (13°C) and 4.0 in (101 mm) of rain.
How cold is Snoqualmie Pass in May?
Average highs are 55°F (13°C) and average lows 39°F (4°C), making it the 5th-warmest month by daytime highs.
Does it rain a lot in Snoqualmie Pass in May?
Some: about 4.0 in (101 mm) of rain falls across May on average, the 5th-driest month of the year. The annual total is about 69.4 in (1764 mm).
What should I pack for Snoqualmie Pass in May?
Bring insulated jacket (highs only 55°F), packable rain jacket or umbrella (about 4.0 in of rain) and comfortable walking shoes (most picks involve some walking).
More on Snoqualmie Pass
Planning Snoqualmie Pass in May?
Plan it together in TripsCircle: one itinerary, one shared packing list and costs split as you go.