Renton, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Renton, a city in King County, Washington.
Overnight
56°F
Clear
Clear, with a low around 56. North northeast wind around 5 mph.
7-day forecast for Renton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Clear | 5 mph NNE | 0% |
| Tuesday | 86°F | Areas Of Smoke | 3 to 8 mph N | 0% |
| Tuesday Night | 60°F | Areas Of Smoke | 2 to 7 mph N | 0% |
| Wednesday | 91°F | Patchy Smoke | 2 to 6 mph N | 0% |
| Wednesday Night | 61°F | Mostly Clear | 1 to 6 mph NNE | 0% |
| Thursday | 91°F | Sunny | 1 to 5 mph WSW | 0% |
| Thursday Night | 62°F | Mostly Clear | 5 mph WNW | 0% |
| Friday | 87°F | Sunny | 3 mph SW | 0% |
| Friday Night | 61°F | Mostly Clear | 1 to 6 mph N | 0% |
| Saturday | 84°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 N | 1% |
| Monday | 78°F | Mostly Sunny | 5 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Renton (47.479, -122.195). Updated through the day.
Growing snapshot for Renton
Last spring frost
Mar 13
First fall frost
Nov 16
Growing season
248 days
Hardiness zone
9a
More local growing data for Renton: nearby ZIP 98057 weather · frost dates · planting calendar · Washington frost dates
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East Renton Highlands
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Climate data from the nearest NOAA station, Renton Muni Ap, Wa (1.5 mi from Renton). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.