Sumas, Washington Weather
Fireweed Ignites. Day 14 of summer. Read this microseason across nine climate regions →
Sumas weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast——69°55°—
- SundayJul 5Overcast——77°52°+8°
- MondayJul 6Overcast——81°54°+4°
- TuesdayJul 7Overcast——79°53°-2°
- WednesdayJul 8Drizzle42%0.07″70°56°-9°
- ThursdayJul 9Overcast——75°55°+5°
- FridayJul 10Mostly Clear11%—81°51°+6°
AQI 29 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±4 points).
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
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
- 11:20 PM
- Moonset
- 10:10 AM
- In sign
- ♓︎ Pisces
Fireweed Ignites
Sumas at a glance
- Today vs. normal: 65°F — typical for the season
- Last frost: June 9 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 98295
16-Day Forecast — Sumas
- Sat69°55°3%
- Sun77°52°0%
- Mon81°54°0%
- Tue79°53°2%
- Wed70°56°42%
- Thu75°55°3%
- Fri81°51°11%
- Sat78°54°18%
- Sun87°59°12%
- Mon87°61°6%
- Tue81°56°8%
- Wed81°50°11%
- Thu92°55°9%
- Fri93°60°0%
- Sat96°62°3%
- Sun92°63°3%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 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.
ZIP codes in Sumas
- 98295