Marietta-Alderwood, Washington Weather
Rufous Hummingbirds Arrive. Day 77 of spring. Read this microseason across nine climate regions →
Marietta-Alderwood weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast10%—60°53°—
- FridayJun 5Rain62%0.41″57°49°-3°
- SaturdayJun 6Drizzle69%0.10″56°46°-1°
- SundayJun 7Light Drizzle——61°46°+5°
- MondayJun 8Light Showers50%0.24″61°49°0°
- TuesdayJun 9Heavy Drizzle51%0.25″52°49°-9°
- WednesdayJun 10Overcast26%—59°49°+7°
PM2.5/PM10 ratio 0.68 with 9 mph wind — characteristic of long-range haze transport rather than a local source. AQI projected to ease from current levels toward 43 over the next 6 hours.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 11 AM.
What's driving it
PM × Wind × Precip
PM2.5/PM10 ratio 0.68 with 9 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.68
- 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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 7:16 AM
- Moonset
- 3:46 PM
- In sign
- ♑︎ Capricorn
Rufous Hummingbirds Arrive
Marietta-Alderwood at a glance
- Today vs. normal: 13°F below the seasonal normal for this latitude
- Last frost: June 8 (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 4, 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 — Marietta-Alderwood
SPC has placed Marietta-Alderwood in the General Thunderstorms category for severe thunderstorms tomorrow.
- TODAYNONENo severe risk
- TOMORROWTSTMGeneral Thunderstorms
- 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.