If you’re planning to spend Independence Day in Washington, you’ll need to think about more than just fireworks and parades. The state’s landscapes—from the Pacific coast to the Cascades and then into the drier east—bring some pretty different weather patterns. On average, you’ll see mild to warm temperatures in early July, with drier conditions west of the Cascades and hotter, sunnier days east of the mountains.
Western Washington, including Seattle and the Puget Sound area, usually stays comfortable with highs in the low to mid-70s Fahrenheit. There’s only a small chance of light rain.
Meanwhile, folks in eastern Washington often get clear skies and daytime highs in the 80s or even 90s. Where you celebrate really shapes your experience.
If you know these patterns, you can set realistic expectations for barbecues, hikes, or waterfront events. With a good sense of what the Fourth of July weather brings, you can pick the right spot, pack what you need, and enjoy your holiday without too many surprises.
Typical Weather Conditions on Independence Day
Across Washington, Independence Day usually brings mild to warm temperatures, not much rain, and a mix of morning clouds with afternoon sun. Conditions really depend on whether you’re near the coast, in the Puget Sound area, or east of the Cascades.
Average Temperatures Across the State
Temperatures on July 4th really do differ from west to east. In Western Washington—places like Seattle, Olympia, and Everett—average highs usually land in the mid-70s°F (24°C).
Some years run cooler, with highs in the mid-60s, but warmer years have hit the low 90s. It’s a bit of a toss-up.
In Eastern Washington, including Spokane and the Tri-Cities, average highs are much warmer. You’ll see mid-80s to low 90s°F (29–33°C), and sometimes it even tops 100°F in the hottest years.
Nights in the east cool off pretty quickly, often dropping into the 50s or low 60s. That’s a big swing from the afternoons.
Mountain areas like the Cascades and Olympic ranges stay cooler. Highs often stick to the 60s, and evenings can feel chilly.
If you’re planning outdoor activities at higher elevations, you might want to bring a light jacket for after sunset.
| Region | Typical High (°F) | Typical Low (°F) | Notes |
|---|---|---|---|
| Puget Sound | 72–78 | 54–58 | Morning clouds, afternoon sun |
| Eastern Washington | 85–92 | 55–62 | Hotter, drier conditions |
| Mountain Areas | 60–68 | 45–50 | Cooler, breezy evenings |
Rainfall and Precipitation Trends
Rainfall on Independence Day in Washington doesn’t happen often, especially compared to the wetter spring months. In the Puget Sound region, measurable rain has only shown up a few times in the last twenty years.
When rain does happen, it’s usually light, often less than a tenth of an inch. Not exactly a washout.
Eastern Washington is even drier. July kicks off the driest stretch of the year, so rain on the holiday is rare.
Skies are typically clear, although every so often, a thunderstorm pops up near the mountains or in the Columbia Basin.
Near the coast, you might wake up to a little drizzle or marine clouds. Those usually burn off by midday, leaving things dry and mild for evening fireworks.
You probably won’t see prolonged rain anywhere in the state on July 4.
Humidity and Wind Patterns
Humidity levels swing a lot between western and eastern Washington. In Western Washington, marine air often brings high humidity in the morning—sometimes above 80%.
By afternoon, humidity drops to the 40–60% range as skies clear up. It’s a noticeable shift.
In Eastern Washington, humidity stays much lower. Afternoon levels usually hover around 20–30%, making the air feel pretty dry.
This dryness bumps up the wildfire risk, especially when people set off fireworks or grill outdoors.
Winds usually stay light to moderate. Along the coast and in the Puget Sound lowlands, afternoon breezes from the west or northwest are common—generally 5–15 mph.
In Eastern Washington, winds can get gustier, especially in open valleys or near the Columbia River Gorge, where speeds sometimes top 20 mph.
Most regions see calmer evenings, which makes things pretty pleasant for outdoor gatherings once the sun goes down.
Regional Climate Differences in Washington
Washington’s climate can shift a lot depending on which side of the Cascade Range you’re on. Coastal areas west of the mountains stay cooler and wetter, while inland valleys and plateaus to the east get much drier and warmer in summer.
Western Washington Weather Overview
In western Washington, July weather often feels mild compared to the interior. Average highs in Seattle stick around the mid-70s °F (about 24°C), and nights cool into the upper 50s °F (14–15°C).
Humidity stays moderate, and Puget Sound plus the Pacific Ocean help keep extreme heat in check.
Rainfall is low during early July, averaging less than 1 inch. Still, skies can be partly cloudy, and marine air sometimes keeps mornings on the cool side.
You’ll get long daylight hours, which is perfect for outdoor events and fireworks.
If you’re heading to coastal areas like the Olympic Peninsula, you’ll probably see even cooler temperatures—often in the 60s °F (16–20°C). Winds off the ocean can bring a chill at night, so packing a light jacket isn’t a bad idea.
Eastern Washington Weather Overview
Eastern Washington looks completely different because the Cascade Range blocks most of the Pacific moisture. July afternoons get hot, with average highs in the upper 80s to low 90s °F (31–34°C).
Nights cool into the 50s or 60s °F, so you’ll notice bigger temperature swings than in the west.
Rain is scarce, often less than half an inch for the whole month. Skies are usually clear, and sunshine dominates.
Cities like Spokane, Yakima, and Walla Walla often get stable weather—great for outdoor barbecues, parades, and even vineyard visits.
The dry air and heat can increase wildfire risk, so keep an eye on local fire restrictions.
Influence of Major Geographic Features
Washington’s summer weather really depends on the terrain. Mountains and coastal features shape rainfall, temperature, and cloud cover, which explains why things can change so quickly within short distances.
Impact of the Cascade Range
The Cascade Range splits Washington into two very different climate zones. Moist air from the Pacific moves inland, and the mountains force it upward, creating heavy rainfall on the western slopes.
By the time the air crosses to the east, it’s much drier, which creates the rain shadow effect.
In early July, you can see this contrast pretty clearly. Western areas like Seattle often get mild temperatures in the 70s °F with occasional light showers.
Eastern cities like Spokane are warmer and drier, often reaching the 80s °F.
Elevation matters, too. Higher spots like Mount Rainier stay cool, and you’ll still find lingering snow at the summit.
If you’re planning to hike or camp near the Cascades around Independence Day, expect cooler nights and more unpredictable afternoon cloud buildups than in the lowlands.
Role of the Olympic Mountains
The Olympic Mountains create another strong rain shadow, especially around the northeastern side of the peninsula. Towns like Sequim stay much drier than places just a short drive away, such as Quinault, which gets some of the state’s highest rainfall totals.
During early July, you may find sunny skies and comfortable mid-70s °F temperatures in the northeast peninsula. The western slopes, meanwhile, remain cooler and cloudier.
The Olympic peaks also block marine air from spreading evenly across the region. This makes coastal areas like Forks more humid and prone to drizzle, while sheltered valleys nearby may be much sunnier.
If you’re traveling around the peninsula, be ready for quick shifts in weather within less than an hour’s drive.
San Juan Islands Microclimate
The San Juan Islands sit in the rain shadow of both the Olympic Mountains and Vancouver Island. This location gives the islands some of the most stable summer weather in Washington.
Around Independence Day, the islands usually enjoy dry, sunny weather with daytime temperatures in the upper 60s to mid-70s °F. Rainfall stays minimal compared to the mainland.
Winds off the Strait of Juan de Fuca keep the air fresh and cooler than inland areas, which makes evenings comfortable.
If you’re visiting the San Juans, you can expect more consistent weather and fewer sudden showers than in other parts of western Washington.
Weather Variability and Historical Patterns
Independence Day weather in Washington can shift a lot depending on where you are. Coastal and western areas often see cooler, cloudier conditions, while inland regions trend warmer and drier.
Looking at past records helps you get a sense of how much things can change from year to year.
Year-to-Year Weather Fluctuations
Washington’s climate splits sharply between west and east. In Seattle, July 4th highs usually settle near the mid-70s °F, but past years have ranged from the upper 60s to the mid-80s.
Cloud cover is also common, with about a 30–40% chance of overcast skies even in midsummer.
Spokane shows bigger swings. Average highs reach the mid-80s °F, but some years have climbed into the 90s, while cooler years barely hit the 70s.
Rain is less frequent than in the west, but thunderstorms still pop up sometimes in early July.
If you plan outdoor activities, expect some variability. A warm, sunny holiday is common, but it’s not a sure thing.
Checking both local records and short-term forecasts helps you get ready for either a pleasant evening barbecue or a cooler, damp celebration.
Recent Independence Day Weather Trends
In recent decades, July 4th in western Washington has trended drier compared to early summer averages. Seattle often records less than 1 inch of rain for the month, and the holiday itself usually passes without measurable precipitation.
Drizzle or light showers have shown up in some years, especially near the coast.
Eastern Washington has seen an even stronger pattern of hot, dry holiday weather. Spokane and nearby valleys often reach highs in the upper 80s to low 90s °F, with very low humidity.
Nights cool down more quickly than in the west, making evening fireworks more comfortable.
Clear skies are most common in July, especially inland. Records show 60–70% of Independence Days in Spokane feature mostly sunny conditions, while Seattle sees clearer skies about half the time.
This contrast really highlights how much geography shapes your holiday experience in Washington.
Outdoor Activities and Weather Considerations
Warm, dry conditions usually make Independence Day in Washington a good time for outdoor plans. Still, the mix of coastal coolness and inland heat means you’ll want to prepare for different weather depending on where you celebrate.
Planning for Fireworks and Events
Fireworks displays usually happen in the evening when skies are clear and winds are light. In western Washington, temperatures typically stay between 60–70°F (16–21°C) after sunset.
Eastern Washington can remain warmer, often in the 70s°F (21–25°C). A light jacket might be handy near the coast, while inland you’ll probably be fine in short sleeves.
Rain is uncommon in early July, but haze from wildfire smoke can sometimes reduce visibility in the east. If you’re heading to a big outdoor gathering, check local air quality reports.
Waterfront parks in Seattle, Tacoma, and Olympia attract big crowds, especially since humidity is higher and temperatures feel cooler after dark. Inland cities like Spokane or Yakima often host events in drier, warmer air.
Bring water, sunscreen, and maybe look for some shade during the day before the evening celebrations kick off.
Best Times of Day for Outdoor Gatherings
Midday usually brings the hottest temperatures, especially east of the Cascades. Highs there can jump up to 85–95°F (29–35°C), which, honestly, feels pretty intense.
If you’re planning a picnic or barbecue, you’ll probably want to aim for late morning or early evening to dodge that peak heat. Shade structures or covered picnic spots really do make gatherings more comfortable.
In western Washington, highs generally hang out in the 70s°F (21–26°C). Afternoons feel nice, but it can get surprisingly cool near Puget Sound, thanks to those marine breezes.
Light layers are your friend if you’ll be outside into the night. It’s easy to underestimate how chilly it gets.
Early mornings stay cooler everywhere, often in the 50s–60s°F (10–16°C). That’s perfect for hiking, biking, or hitting the water before the crowds show up.
Evenings usually calm down with mild temps, so it’s a great time for relaxed outdoor dinners or catching fireworks.
Travel Tips for Independence Day in Washington
Early July weather gives you warm days and cooler evenings, with big differences between western and eastern Washington. If you prep for these swings, you’ll stay comfortable at outdoor events, in the city, or out in nature.
Packing and Clothing Recommendations
Daytime highs usually land somewhere between the mid-70s and mid-80s °F, but eastern Washington often hits the 90s. Nights cool off, especially in rural spots or up in the hills, so you’ll want to pack layers.
Bring lightweight shirts and shorts for the day, and toss in a sweater or light jacket for evenings. If you’re heading to the coast or Puget Sound, a windbreaker is a smart move, since those breezes can surprise you even in summer.
You’ll want comfortable walking shoes for parades, festivals, or wandering around parks. If hiking’s on your list, grab sturdy shoes and moisture-wicking socks.
Don’t forget sunscreen, sunglasses, and a hat—the July sun really doesn’t mess around across the state.
A refillable water bottle is a must to stay hydrated, especially east of the Cascades where it’s hotter and the air feels dry.
Advice for Different Regions
Western Washington (Seattle, Olympia, coastal towns) usually gets mild to warm afternoons, with highs hanging around 70–80°F. Evenings cool off fast. Light rain sometimes shows up, but honestly, it’s not that common in July. You’ll probably want a light jacket if you’re out late for fireworks or hanging by the water.
Eastern Washington (Spokane, Tri-Cities, Walla Walla) feels much hotter and drier. Daytime highs often climb into the upper 80s or 90s. Make sure you find shade, drink water often, and maybe skip heavy outdoor stuff during the hottest part of the afternoon.
Mountain areas like Mount Rainier or the Cascades stay cooler, especially after sunset. If you’re camping or hiking, definitely pack warmer layers. Nights can drop into the 40s or 50s °F, even right in the middle of summer.
For coastal regions, fog sometimes rolls in during the mornings and evenings. A light fleece or windproof layer helps a lot if you’re watching fireworks by the ocean.