Renton, WA Weather & Growing Conditions
Tonight
53°F
Partly Cloudy
Partly cloudy, with a low around 53. South wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 53°F | Partly Cloudy | 2 mph S | 0% |
| Saturday | 74°F | Partly Sunny | 0 to 3 mph WSW | 1% |
| Saturday Night | 54°F | Partly Cloudy | 2 mph N | 0% |
| Sunday | 74°F | Mostly Sunny | 1 to 6 mph N | 0% |
| Sunday Night | 54°F | Mostly Clear | 0 to 6 mph NNE | 0% |
| Monday | 73°F | Mostly Sunny | 0 to 3 mph WSW | 0% |
| Monday Night | 54°F | Partly Cloudy | 3 mph NNE | 2% |
| Tuesday | 70°F | Partly Sunny | 2 mph NNW | 2% |
| Tuesday Night | 53°F | Partly Cloudy | 2 mph ENE | 2% |
| Wednesday | 69°F | Partly Sunny | 3 mph WNW | 4% |
| Wednesday Night | 53°F | Mostly Cloudy | 3 mph NNE | 6% |
| Thursday | 71°F | Partly Sunny | 1 to 5 mph N | 14% |
| Thursday Night | 54°F | Chance Light Rain | 5 mph S | 26% |
| Friday | 68°F | Chance Light Rain | 2 to 6 mph SW | 26% |
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 Sep 19, 2026.