Snohomish, Washington Weather
Rufous Hummingbirds Arrive. Day 78 of spring. Read this microseason across nine climate regions →
Snohomish weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Drizzle46%0.06″63°52°—
- FridayJun 5Overcast36%—58°49°-5°
- SaturdayJun 6Light Showers73%—57°45°-1°
- SundayJun 7Light Drizzle13%—64°44°+7°
- MondayJun 8Overcast45%—69°40°+5°
- TuesdayJun 9Overcast57%—74°43°+5°
- WednesdayJun 10Overcast51%—66°47°-8°
AQI 37 (Good), driven by PM2.5. AQI up 11 over the last 6 hours (gradual rise). PM2.5 at 7.2 µg/m³, PM10 at 8.7 µg/m³ — typical background levels with no transport signature.
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 35. Overcast through the UV peak window (cloud cover ~89%) — afternoon ozone should stay flat.
- Present
- AQI 35
- UV peak
- 0.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 4
PM × Wind × Precip
PM2.5 at 7.2 µg/m³, PM10 at 8.7 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.83
- 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
- 7:35 AM
- Moonset
- 5:01 PM
- In sign
- ♒︎ Aquarius
Rufous Hummingbirds Arrive
Snohomish at a glance
- Today vs. normal: 12°F below the seasonal normal for this latitude
- Last frost: June 3 (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 5, 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 — Snohomish
SPC has placed Snohomish 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.