Issaquah, WA Weather & Growing Conditions
Today
89°F
Areas Of Smoke
Areas of smoke. Sunny, with a high near 89. North wind 2 to 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 89°F | Areas Of Smoke | 2 to 7 mph N | 0% |
| Tonight | 57°F | Areas Of Smoke | 1 to 6 mph NE | 0% |
| Wednesday | 95°F | Areas Of Smoke | 1 to 5 mph N | 0% |
| Wednesday Night | 59°F | Mostly Clear | 3 mph NE | 0% |
| Thursday | 94°F | Sunny | 0 to 3 mph SW | 0% |
| Thursday Night | 59°F | Mostly Clear | 3 mph SW | 0% |
| Friday | 91°F | Sunny | 3 mph SW | 0% |
| Friday Night | 58°F | Mostly Clear | 1 to 5 mph NNE | 0% |
| Saturday | 85°F | Sunny | 3 mph W | 0% |
| Saturday Night | 56°F | Mostly Clear | 1 to 8 mph NNE | 1% |
| Sunday | 81°F | Mostly Sunny | 2 mph W | 1% |
| Sunday Night | 55°F | Mostly Clear | 3 mph NNE | 0% |
| Monday | 80°F | Mostly Sunny | 3 mph W | 1% |
| Monday Night | 55°F | Partly Cloudy | 3 mph NNE | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Issaquah, WA
Last spring frost
Mar 30
First fall frost
Nov 7
Growing season
223 days
Hardiness zone
8b
Explore more for Issaquah, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Snoqualmie Falls, Wa (7.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.