Renton, WA Weather & Growing Conditions
Overnight
56°F
Clear
Clear. Low around 56, with temperatures rising to around 58 overnight. North northeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Clear | 5 mph NNE | 0% |
| Tuesday | 85°F | Areas Of Smoke | 3 to 8 mph N | 0% |
| Tuesday Night | 60°F | Areas Of Smoke | 2 to 7 mph N | 0% |
| Wednesday | 90°F | Patchy Smoke | 2 to 6 mph N | 0% |
| Wednesday Night | 61°F | Mostly Clear | 1 to 6 mph NNE | 0% |
| Thursday | 90°F | Sunny | 1 to 5 mph WNW | 0% |
| Thursday Night | 63°F | Mostly Clear | 5 mph W | 0% |
| Friday | 87°F | Sunny | 3 mph SW | 0% |
| Friday Night | 61°F | Mostly Clear | 1 to 6 mph NNE | 0% |
| Saturday | 83°F | Sunny | 1 to 5 mph WSW | 0% |
| Saturday Night | 59°F | Mostly Clear | 2 to 7 mph NE | 1% |
| Sunday | 79°F | Mostly Sunny | 3 mph WSW | 1% |
| Sunday Night | 58°F | Mostly Clear | 3 mph NNE | 1% |
| Monday | 78°F | Mostly Sunny | 3 mph WNW | 1% |
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 (1.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.