Bellevue, Washington Weather
August Arrives Dimmed. Day 43 of summer. Read this microseason across nine climate regions →
Bellevue weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayAug 2Overcast10%—68°56°—
- MondayAug 3Clear——78°51°+10°
- TuesdayAug 4Clear——88°51°+10°
- WednesdayAug 5Clear——94°54°+6°
- ThursdayAug 6Overcast——96°56°+2°
- FridayAug 7Partly Cloudy——87°56°-9°
- SaturdayAug 8Mostly Clear——86°53°-1°
AQI 21 (Good), driven by Ozone. 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.
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).








































Red sky at night, sailor's delight.
- Moonrise
- 9:55 PM
- Moonset
- 10:21 AM
- In sign
- ♓︎ Pisces
August Arrives Dimmed
Bellevue at a glance
- Today vs. normal: 4°F above the seasonal normal for this latitude
- Last frost: June 1 (climatological average for this latitude)
- Microseason: Aug 1–5
- Planting window: Sow fall peas. Start kale and collard seedlings for fall.
ZIP codes: 98004, 98005, 98006, 98007, 98008
16-Day Forecast — Bellevue
- Sun68°56°10%
- Mon78°51°1%
- Tue88°51°0%
- Wed94°54°0%
- Thu96°56°0%
- Fri87°56°0%
- Sat86°53°0%
- Sun82°51°0%
- Mon83°52°2%
- Tue84°53°3%
- Wed86°56°1%
- Thu85°56°6%
- Fri89°56°6%
- Sat87°57°3%
- Sun80°53°6%
- Mon77°56°10%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Bellevue
Right now in the garden
Peak growing season
As of August 2, 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.
Sun & seasons in Bellevue
Bellevue sits in King County, where the year’s longest day runs 15h 59m of daylight and its shortest just 8h 25m — a swing of +7h 34m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Seattle, the state’s largest city, lies about 8 miles to the WNW. The nearest town Bellevue tracks is Seattle, roughly 8 miles to the WNW.
Air quality in Bellevue’s county has held roughly steady since 2020; its cleanest year on record was 2024 (median AQI 41). See the full air-quality history for Bellevue.
Microseason · August 1–5
August Arrives Dimmed
Smoke persists. Nights fall noticeably earlier—sunset shifts 3 minutes earlier than June's solstice. Resinous fir and cedar scent hangs thick.
Day 214 of 365 · Wedge 43 of 72
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
The year in Bellevue tops out in August (~67°F) and dips lowest in January (~38°F), with November wettest at 7.9 inches and July driest at 0.5 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 38° | 7.5″ | 23 |
| February | 40° | 5.5″ | 20 |
| March | 43° | 5.6″ | 23 |
| April | 48° | 4.1″ | 20 |
| May | 55° | 3.1″ | 19 |
| June | 60° | 2.4″ | 16 |
| July | 66° | 0.5″ | 7 |
| August | 67° | 0.9″ | 6 |
| September | 60° | 2.4″ | 12 |
| October | 51° | 6.2″ | 19 |
| November | 44° | 7.9″ | 23 |
| December | 38° | 7.5″ | 24 |
Regional context
In Bellevue, NOAA NCEI 1991-2020 normals put January near 38°F and July near 66°F — a 28°F seasonal arc — with about 53.6 inches of precipitation over 211 rainy or snowy days.
Precipitation in Bellevue peaks in the cool season: November averages 7.9 inches across 22.6 storm-fed days, while July bottoms out at 0.5 inches over just 6.8 rainy days. That cool-season-wet pattern aligns Bellevue with places like Beaux Arts Village, WA, Clyde Hill, WA and Mercer Island, WA.
Around late-May, Bellevue sheds its freezing nights — peas, lettuce, spinach, and radishes go into Bellevue's beds. Heat-demanding starts go out a fortnight on in Bellevue, after the soil warms and cold snaps clear. Frost returns to Bellevue near early-October, ending the tender-crop season. A creek-bottom lot in Bellevue can lag Bellevue's last frost 7-10 days behind a south slope.
Similar climates: Beaux Arts Village, WA, Clyde Hill, WA, Mercer Island, WA, Newcastle, WA, Medina, 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?
- Frost typically leaves Bellevue by mid-May and returns to Bellevue near mid-October.
- What is the rainy season in Bellevue?
- Bellevue sees its heaviest rain in November (around 7.9 inches), part of roughly 54 inches a year.
- What is the warmest month in Bellevue?
- August is Bellevue's warmest month, averaging about 67°F.
- What is the coldest month in Bellevue?
- Bellevue bottoms out in January, with a mean near 38°F.
- When can I start a vegetable garden in Bellevue?
- Time tomatoes in Bellevue for two weeks after mid-May; peas and greens start at Bellevue's frost line.
- How many rainy days does Bellevue get?
- Bellevue records around 211 days of measurable precipitation annually.
- What hardiness zone is Bellevue?
- Bellevue sits in the USDA zone set by January lows near 38°F; the USDA ZIP tool gives the band.
- What is the 10-day forecast for Bellevue?
- Bellevue's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in Bellevue?
- See this week's day-by-day rain chances for Bellevue in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Bellevue?
- Current conditions for Bellevue and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Bellevue forecast updated?
- The Bellevue forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Bellevue?
- Today's sunrise and sunset times for Bellevue are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for Bellevue?
- The next few days in Bellevue's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Climate
Bellevue, Washington has a warm-summer Mediterranean climate: January averages roughly 38°F, July about 66°F, 28°F between them.
Across the year, Bellevue collects about 54 inches of precipitation over roughly 211 days with measurable rain or snow.
Latitude 47.6°N gives Bellevue its 28°F swing, and with it the rhythm of Bellevue's growing season.
ZIP codes in Bellevue
- 98004
- 98005
- 98006
- 98007
- 98008
- 98009
- 98015