Renton, WA Weather & Growing Conditions
Tonight
42°F
Mostly Clear then Patchy Fog
Patchy fog between 2am and 3am. Mostly clear, with a low around 42. East wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 42°F | Mostly Clear then Patchy Fog | 1 mph E | 3% |
| Wednesday | 59°F | Patchy Fog then Slight Chance Light Rain | 3 mph S | 16% |
| Wednesday Night | 49°F | Light Rain | 3 to 9 mph S | 91% |
| Thursday | 59°F | Slight Chance Light Rain then Partly Sunny | 5 to 8 mph SSW | 21% |
| Thursday Night | 48°F | Light Rain | 6 mph SSE | 77% |
| Friday | 58°F | Light Rain | 3 to 8 mph S | 77% |
| Friday Night | 48°F | Chance Light Rain | 3 mph SSE | 43% |
| Saturday | 62°F | Chance Light Rain | 3 mph SSE | 29% |
| Saturday Night | 51°F | Light Rain Likely | 2 to 14 mph S | 73% |
| Sunday | 58°F | Light Rain Likely | 3 to 14 mph SSW | 73% |
| Sunday Night | 46°F | Slight Chance Light Rain | 3 mph SE | 20% |
| Monday | 58°F | Chance Light Rain | 3 mph SE | 51% |
| Monday Night | 48°F | Light Rain Likely | 3 to 7 mph SSE | 70% |
| Tuesday | 60°F | Light Rain Likely | 5 to 8 mph S | 70% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Renton, WA
Last spring frost
Mar 13
First fall frost
Nov 16
Growing season
248 days
Hardiness zone
9a
Explore more for Renton, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Renton Muni Ap, Wa (1.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.