Startup, Washington Weather
Rufous Hummingbirds Arrive. Day 76 of spring. Read this microseason across nine climate regions →
Startup weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Light Drizzle20%0.02″70°58°—
- ThursdayJun 4Light Rain37%0.29″63°53°-7°
- FridayJun 5Drizzle88%—57°48°-6°
- SaturdayJun 6Showers87%0.22″54°44°-3°
- SundayJun 7Drizzle—0.01″65°43°+11°
- MondayJun 8Heavy Drizzle50%0.17″55°49°-10°
- TuesdayJun 9Light Drizzle51%—59°49°+4°
PM2.5 at 13.3 µg/m³ (AQI 59) with a 0.71 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust. 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 43. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
- Present
- AQI 43
- UV peak
- 4.1 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 12
PM × Wind × Precip
PM2.5 at 13.3 µg/m³ (AQI 59) with a 0.71 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.71
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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
- 2:37 PM
- In sign
- ♑︎ Capricorn
Rufous Hummingbirds Arrive
Startup at a glance
- Today vs. normal: 66°F — typical for the season
- Last frost: June 2 (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 — Startup
SPC has placed Startup 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.