Seattle, Washington Weather
Rufous Hummingbirds Arrive. Day 76 of spring. Read this microseason across nine climate regions →
Seattle weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast——68°55°—
- ThursdayJun 4Light Drizzle17%0.02″64°51°-4°
- FridayJun 5Drizzle57%—58°47°-6°
- SaturdayJun 6Light Showers72%—56°44°-2°
- SundayJun 7Overcast——65°46°+9°
- MondayJun 8Overcast33%—63°46°-2°
- TuesdayJun 9Light Drizzle35%0.02″62°53°-1°
PM2.5 at 14.4 µg/m³, PM10 at 20.1 µg/m³ — typical background levels with no transport signature. AQI flat over the last 6 hours (within ±3 points).
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 33. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
- Present
- AQI 33
- UV peak
- 2.8 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 6
PM × Wind × Precip
PM2.5 at 14.4 µg/m³, PM10 at 20.1 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.72
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- background
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
The higher the clouds, the finer the weather.
- Moonrise
- 6:39 AM
- Moonset
- 2:41 PM
- In sign
- ♑︎ Capricorn
Rufous Hummingbirds Arrive
Seattle at a glance
- Today vs. normal: 5°F below the seasonal normal for this latitude
- Last frost: June 1 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 3, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Seattle
SPC has placed Seattle in the General Thunderstorms category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWNONENo severe risk
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | — | — |
| April | — | — |
| May | lettuce, peas, spinach, radishes | lettuce, peas, radishes |
| June | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | tomatoes, peppers, beans, squash | tomatoes, beans, summer squash |
| August | tomatoes, peppers, beans, squash, fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| September | fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| October | — | winter squash, tomatoes (last) |
| November | — | — |
| December | — | — |
A year in weather
August marks Seattle's warmest month (~67°F mean), while December brings the coldest temperatures (~42°F). Rain follows its own schedule, with November delivering peak amounts (5.8 inches) and July providing the driest conditions (0.8 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 42° | 5.1″ | 12 |
| February | 43° | 3.5″ | 9 |
| March | 47° | 3.9″ | 11 |
| April | 51° | 3.0″ | 9 |
| May | 57° | 2.2″ | 6 |
| June | 61° | 1.6″ | 5 |
| July | 67° | 0.8″ | 2 |
| August | 67° | 1.0″ | 3 |
| September | 62° | 1.7″ | 5 |
| October | 54° | 3.6″ | 9 |
| November | 46° | 5.8″ | 12 |
| December | 42° | 5.5″ | 12 |
Regional context
Seattle belongs to the warm-summer Mediterranean climate region, sharing temperature ranges, seasonal patterns, and growing conditions with other cities in this climate zone.
Similar climates: Spokane, WA, Kennewick, WA, Bremerton, WA, Tacoma, WA, Olympia, WA.
Naturalist notes
Pacific madrone trees begin their distinctive bark-shedding process in late May, revealing smooth reddish underskin as temperatures warm.
American robins start their second nesting cycle around mid-May, taking advantage of longer daylight hours and abundant earthworms in Seattle's moist soils.
Frequently asked
- When does it freeze in Seattle?
- Seattle's last spring frost typically occurs around mid-May, while the first fall frost returns around mid-October.
- What is the rainy season in Seattle?
- November brings the wettest conditions with about 5.8 inches of rain on average; Seattle receives roughly 38 inches annually.
- What is the warmest month in Seattle?
- August typically delivers the warmest temperatures, averaging about 67°F.
- What is the coldest month in Seattle?
- December typically brings the coldest weather, averaging about 42°F.
- When can I start a vegetable garden in Seattle?
- Cool-season crops like peas and lettuce can be planted around the last spring frost (mid-May); warm-season crops such as tomatoes and peppers should wait until 1–2 weeks after.
- How many rainy days does Seattle get?
- Seattle experiences about 95 rainy days per year on average.
- What hardiness zone is Seattle?
- Seattle's USDA hardiness zone depends on its lowest average winter temperature; the USDA's online lookup tool provides current zone designation when you enter the city ZIP code.
Climate
Seattle, Washington experiences a warm-summer Mediterranean climate zone. Winter temperatures in January typically hover near 42°F, while July brings averages of 67°F — creating a 24°F seasonal swing.
Annual precipitation in Seattle totals about 38 inches, falling across roughly 95 rainy days throughout the year.
Location at 47.6°N latitude, along with proximity to large water bodies and local elevation, determines the rhythm of seasons here. These factors influence plant growth cycles, frost timing, and daily weather patterns.