Summit, Washington Weather
Rufous Hummingbirds Arrive. Day 76 of spring. Read this microseason across nine climate regions →
Summit weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast——71°56°—
- ThursdayJun 4Overcast——65°51°-6°
- FridayJun 5Drizzle73%0.03″57°46°-8°
- SaturdayJun 6Showers83%0.34″53°42°-4°
- SundayJun 7Light Drizzle——64°43°+11°
- MondayJun 8Drizzle44%0.15″53°46°-11°
- TuesdayJun 9Light Drizzle37%—58°47°+5°
PM2.5 at 12.0 µg/m³, PM10 at 17.1 µg/m³ — typical background levels with no transport signature. 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 37. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
- Present
- AQI 37
- UV peak
- 4.2 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 10
PM × Wind × Precip
PM2.5 at 12.0 µg/m³, PM10 at 17.1 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.70
- 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
- 6:36 AM
- Moonset
- 2:43 PM
- In sign
- ♑︎ Capricorn
Rufous Hummingbirds Arrive
Summit at a glance
- Today vs. normal: 68°F — typical for the season
- Last frost: May 29 (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 — Summit
SPC has placed Summit 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.