Issaquah, WA Weather & Growing Conditions
This Afternoon
58°F
Partly Sunny
Partly sunny. High near 58, with temperatures falling to around 52 in the afternoon. North wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 58°F | Partly Sunny | 1 mph N | 3% |
| Tonight | 41°F | Partly Cloudy | 0 to 3 mph SSE | 3% |
| Wednesday | 59°F | Mostly Sunny | 0 to 3 mph S | 12% |
| Wednesday Night | 48°F | Light Rain | 1 to 10 mph SSE | 98% |
| Thursday | 57°F | Chance Light Rain then Partly Sunny | 1 to 8 mph S | 39% |
| Thursday Night | 47°F | Light Rain | 1 to 8 mph SE | 79% |
| Friday | 56°F | Light Rain | 1 to 8 mph SSE | 79% |
| Friday Night | 47°F | Chance Light Rain | 1 to 5 mph SE | 50% |
| Saturday | 63°F | Chance Light Rain | 1 to 5 mph SE | 26% |
| Saturday Night | 50°F | Light Rain | 1 to 14 mph S | 79% |
| Sunday | 56°F | Light Rain | 1 to 14 mph SSW | 79% |
| Sunday Night | 45°F | Slight Chance Light Rain | 1 to 6 mph SE | 21% |
| Monday | 57°F | Chance Light Rain | 1 to 6 mph SE | 49% |
| Monday Night | 47°F | Light Rain Likely | 1 to 10 mph SE | 70% |
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 Nov 4, 2026.