WorkWindow

Outdoor Project Weather in Renton, WA

This page runs Renton's forecast against all six task rulesets at once. Verdicts load live above; the month-by-month matrix below — built from NOAA 1991–2020 normals — shows when each job's season opens. Lawn Seeding gets the most calendar here: 288 workable days a year.

Today at a glance

Verdicts load live from the 10-day forecast; without JavaScript this column stays blank and the year-round matrix below still answers the planning question.
TaskTodayBest months hereFull 10-day check
Deck Staining — Jul, Aug, Jun Stain a Deck in Renton →
Exterior Painting — Jul, Aug, Jun Paint Outside in Renton →
Driveway Sealing — Jul, Aug, Jun Seal a Driveway in Renton →
Concrete Pouring — Jul, Aug, Jun Pour Concrete in Renton →
Roof Coating — Jul, Aug, Jun Coat a Roof in Renton →
Lawn Seeding — Mar, May, Jul Seed a Lawn in Renton →

Project weather, month by month

Workable days per month by task, from NOAA 1991–2020 normals for RENTON MUNI AP, WA US. Darker = more workable days.
TaskJanFebMarAprMayJunJulAugSepOctNovDec
Deck Staining 0 0 5 16 19 21 26 26 21 16 7 0
Exterior Painting 0 0 5 16 19 21 26 26 21 16 7 0
Driveway Sealing 0 0 0 0 7 21 26 26 21 1 0 0
Concrete Pouring 0 0 5 16 19 21 26 26 21 16 7 0
Roof Coating 0 0 5 16 19 21 26 26 21 16 7 0
Lawn Seeding 0 18 31 30 31 30 31 31 30 31 25 0

Season edges differ by task — that's the point of checking six at once. In Renton the earliest opener starts around February and the last holdout closes after November. A week that fails the paint rules on humidity can still pass seeding, and a frost that ends concrete season leaves sealing untouched until nights slip under 50°F.

If you only open one full check, make it lawn seeding — Renton's longest season at 288 workable days.

Full 10-day checks

Washington

Climatology: NOAA 1991–2020 normals via RENTON MUNI AP, WA US (2.5 km from Renton center); live outlook by Open-Meteo.