Renton, WA Weather & Growing Conditions
This Afternoon
74°F
Mostly Sunny
Mostly sunny, with a high near 74. Northwest wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 74°F | Mostly Sunny | 3 mph NW | 0% |
| Tonight | 54°F | Mostly Clear | 2 mph N | 0% |
| Sunday | 74°F | Mostly Sunny | 0 to 5 mph NNW | 0% |
| Sunday Night | 53°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Monday | 72°F | Partly Sunny | 0 to 5 mph N | 0% |
| Monday Night | 55°F | Partly Cloudy | 1 to 5 mph NNE | 1% |
| Tuesday | 70°F | Mostly Cloudy | 3 mph WNW | 1% |
| Tuesday Night | 53°F | Mostly Cloudy | 2 mph S | 7% |
| Wednesday | 69°F | Partly Sunny | 3 mph SW | 9% |
| Wednesday Night | 53°F | Mostly Cloudy | 3 mph N | 12% |
| Thursday | 65°F | Mostly Cloudy then Slight Chance Light Rain | 2 to 6 mph NNE | 18% |
| Thursday Night | 51°F | Slight Chance Light Rain | 2 to 6 mph N | 19% |
| Friday | 64°F | Slight Chance Light Rain | 2 to 7 mph N | 21% |
| Friday Night | 50°F | Slight Chance Light Rain then Mostly Cloudy | 6 mph NE | 15% |
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.