Bellevue, Washington Weather
Rufous Hummingbirds Arrive. Day 76 of spring. Read this microseason across nine climate regions →
Bellevue weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast13%—70°57°—
- ThursdayJun 4Overcast14%—65°52°-5°
- FridayJun 5Drizzle59%—59°47°-6°
- SaturdayJun 6Light Showers81%—53°42°-6°
- SundayJun 7Light Drizzle——65°44°+12°
- MondayJun 8Light Drizzle53%0.11″53°47°-12°
- TuesdayJun 9Light Drizzle46%—63°47°+10°
Ozone at AQI 56 — peak already passed at 1 PM under partly cloudy skies. AQI flat over the last 6 hours (within ±3 points). Levels should ease through evening.
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 56 — peak already passed at 1 PM under partly cloudy skies. Levels should ease through evening.
- Present
- AQI 56
- UV peak
- 3.1 at earlier today
- Sky at peak
- partly cloudy
- Projected peak
- AQI 56
PM × Wind × Precip
PM2.5/PM10 ratio 0.70 with 8 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.70
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- transport
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
- 6:38 AM
- Moonset
- 2:40 PM
- In sign
- ♑︎ Capricorn
Rufous Hummingbirds Arrive
Bellevue at a glance
- Today vs. normal: 3°F above 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 — Bellevue
SPC has placed Bellevue 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 brings Bellevue's peak warmth at roughly 67°F average, while December delivers the coldest temperatures around 42°F. Rain reaches its maximum in November with 5.8 inches, then drops to just 0.8 inches during July.
| 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
Bellevue falls within a warm-summer Mediterranean climate region, sharing temperature ranges, seasonal rhythms, and growing conditions with other nearby cities in this climate group.
Similar climates: Seattle, WA, Spokane, WA, Kennewick, WA, Bremerton, WA, Tacoma, WA.
Naturalist notes
Pacific rhododendrons reach peak bloom across Bellevue's parks and gardens during late May, their pink and purple clusters marking the transition from spring to early summer.
American robins begin their evening chorus around 5:30 AM in late May, with males establishing territories before the main nesting season intensifies.
Frequently asked
- When does it freeze in Bellevue?
- Spring's final frost in Bellevue usually occurs around mid-May, while the first fall frost returns around mid-October.
- What is the rainy season in Bellevue?
- November stands as the wettest month, delivering about 5.8 inches of rain on average, while the city's total annual rainfall reaches roughly 38 inches.
- What is the warmest month in Bellevue?
- August typically records the highest temperatures, averaging about 67°F.
- What is the coldest month in Bellevue?
- December usually brings the coldest weather, averaging about 42°F.
- When can I start a vegetable garden in Bellevue?
- Cool-season crops like peas and lettuce can be planted around the last spring frost in mid-May, but warm-season varieties such as tomatoes and peppers should wait 1–2 weeks after.
- How many rainy days does Bellevue get?
- Bellevue experiences about 95 rainy days per year on average.
- What hardiness zone is Bellevue?
- Bellevue's USDA hardiness zone depends on its lowest average winter temperature; the USDA's online lookup tool using the city ZIP code will provide the current zone designation.
Climate
Bellevue, Washington experiences a warm-summer Mediterranean climate. January temperatures hover near 42°F, while July averages 67°F — creating a 24°F seasonal swing.
Annual precipitation totals about 38 inches, falling across roughly 95 rainy days throughout the year.
Weather patterns here follow the city's latitude of 47.6°N, along with nearby water bodies and elevation. These factors determine what plants thrive, when frost occurs, and how daily weather unfolds.