Chehalis, Washington Weather
Fireweed Ignites. Day 15 of summer. Read this microseason across nine climate regions →
Chehalis weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——76°51°—
- MondayJul 6Overcast——83°52°+7°
- TuesdayJul 7Light Drizzle—0.01″77°46°-6°
- WednesdayJul 8Light Drizzle—0.01″71°50°-6°
- ThursdayJul 9Partly Cloudy——77°43°+6°
- FridayJul 10Overcast——71°46°-6°
- SaturdayJul 11Overcast——72°50°+1°
AQI 15 (Good), driven by PM2.5. AQI down 11 over the last 6 hours (gradual decline). PM2.5 at 4.9 µg/m³ (AQI 27) with a 0.83 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 4.9 µg/m³ (AQI 27) with a 0.83 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.83
- Wind
- calm
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:37 PM
- Moonset
- 11:28 AM
- In sign
- ♓︎ Pisces
Fireweed Ignites
Chehalis at a glance
- Today vs. normal: 14°F below the seasonal normal for this latitude
- Last frost: May 26 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 98532
16-Day Forecast — Chehalis
- Sun76°51°0%
- Mon83°52°0%
- Tue77°46°1%
- Wed71°50°9%
- Thu77°43°1%
- Fri71°46°3%
- Sat72°50°7%
- Sun78°45°5%
- Mon84°52°2%
- Tue84°56°3%
- Wed84°51°1%
- Thu87°52°6%
- Fri86°52°0%
- Sat84°52°7%
- Sun79°50°0%
- Mon75°46°7%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 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.
ZIP codes in Chehalis
- 98532