Washington Weather & Climate Guide 2025
Plan your trip with detailed weather information and seasonal tips for Washington.
Washington State, located in the Pacific Northwest corner of the United States, is a land of dramatic contrasts — from the rain-soaked temperate rainforests of the Olympic Peninsula to the volcanic peaks of the Cascades and the arid shrub-steppe of the east. Home to Seattle, one of America's most dynamic cities, the state blends cutting-edge technology culture with stunning wilderness, world-class food and coffee scenes, and some of the continent's most diverse outdoor adventure.
Best Time to Visit
Best Months
June–September
Long daylight hours (up to 16 hours), warm and mostly dry weather in western Washington, stable conditions for hiking and outdoor activities, all attractions and lodges are open
Months to Avoid
November–February
Western Washington sees heavy rainfall and gray skies; mountain roads and passes can close; some national park facilities are shuttered; shorter daylight hours limit sightseeing time
Climate Overview
Washington State has two very distinct climates divided by the Cascade Mountains. Western Washington (including Seattle) has a temperate oceanic climate with mild, rainy winters and warm, dry summers — making it one of the most temperate climates in North America. Eastern Washington has a semi-arid continental climate with cold winters, hot dry summers, and much lower annual precipitation. The Olympic Peninsula is among the wettest places in the continental US, while parts of eastern Washington receive less than 8 inches of rain per year.
Month-by-Month Guide
What to expect each month of the year.
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Seasonal Planning Guide
Complete weather data, packing lists by season, and event calendars.
Seasonal Breakdown
Detailed information for each season.
🌸 Spring
Mar-May
Gradual warming and stunning wildflower displays; Skagit Valley tulip fields bloom in April; cherry blossoms appear in Seattle and the UW campus. Expect rain and some sunshine — pack layers. National parks begin opening facilities in May.
☀️ Summer
Jun-Aug
Washington's finest season — long sunny days, warm temperatures, and access to all outdoor attractions. Paradise at Mount Rainier blooms with wildflowers July-August. San Juan Islands orca watching peaks. Coastal temperatures stay mild. Eastern Washington gets very hot (90-100°F).
🍂 Fall
Sep-Nov
Shoulder season with beautiful fall colors, smaller crowds, and excellent hiking conditions in September-October before winter rains arrive. Wine harvest season in eastern Washington. Leavenworth hosts its famous Oktoberfest. Mushroom foraging peaks in October.
❄️ Winter
Dec-Feb
Western Washington is mild, wet, and rarely snowy at sea level — perfect for cozy urban exploration and dramatic stormy beach walks. Cascade ski resorts (Crystal Mountain, Stevens Pass, Snoqualmie Pass, Mt. Baker) receive enormous snowfall. Leavenworth is magical during Christmas celebrations.
What to Pack
Seasonal packing recommendations.
Year-Round Essentials
- Modest clothing (cover shoulders and knees)
- Comfortable walking shoes
- Sun protection (hat, sunscreen, sunglasses)
- Light scarf or shawl (for religious sites)
- Reusable water bottle
- Power adapter
- Basic first aid kit
Hot Weather Additions
- Lightweight, breathable fabrics
- Extra sun protection
- Cooling towel
- Light colors to reflect heat
- Sandals with back straps
Cool Weather Additions
- Warm layers (fleece, sweater)
- Light jacket or coat
- Rain gear (umbrella, waterproof jacket)
- Closed-toe shoes
- Warm accessories (if winter)
Events & Crowd Levels
Plan around busy periods and special events.
🔴 High Season
July-August (peak summer)
Higher prices, advance booking essential, crowded attractions.
🟡 Shoulder Season
April-May, September-October
Good balance of weather and crowds. Reasonable prices.
🟢 Low Season
November-March (except ski areas)
Best deals, fewer tourists. Some services may be limited.
Major Events & Holidays
Millions of tulips bloom across Skagit County farms — one of the most spectacular spring events in the Pacific Northwest
Major LGBTQ+ pride celebration drawing hundreds of thousands to Capitol Hill and the Seattle Center area
Major fireworks over Lake Union, plus celebrations throughout the state
Seattle's premiere summer festival featuring hydroplane racing on Lake Washington, Blue Angels airshow, and waterfront activities
Bavarian-style Oktoberfest celebration in Leavenworth's village, one of Washington's most popular fall events
Wine harvest festival across 100+ wineries in the Yakima Valley wine region
Enchanting Christmas lights illuminate the Bavarian village; multiple weekends of magical winter celebration
Plan Your Perfect Washington Trip
Get our complete seasonal guide with detailed packing lists, event calendars, and month-by-month planning tips.
Download Weather Guide