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City guide · Washington

Outdoor Project Weather in Kennewick, WA

This page runs Kennewick'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: 178 workable days a year.

Six tasks · one forecast · Washington

SeptemberBest overall month
Lawn SeedingFriendliest task
818 task-daysWorkable task-days/yr
6Tasks tracked
Average of all six tasks

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.
Task	Today	Best months here	Full 10-day check
Deck Staining	—	Sep, Jun, May	Stain a Deck in Kennewick →
Exterior Painting	—	Sep, Jun, May	Paint Outside in Kennewick →
Driveway Sealing	—	Jun, Sep, May	Seal a Driveway in Kennewick →
Concrete Pouring	—	Sep, Jun, May	Pour Concrete in Kennewick →
Roof Coating	—	Sep, Jun, May	Coat a Roof in Kennewick →
Lawn Seeding	—	May, Oct, Apr	Seed a Lawn in Kennewick →

Keep the tour going — compare this calendar with Federal Way, WA behind you or Kent, WA up next.

Project weather, month by month

Workable days per month by task, from NOAA 1991–2020 normals for KENNEWICK, WA US. Darker = more workable days.
Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deck Staining	0	0	0	21	25	25	8	13	27	20	0	0
Exterior Painting	0	0	0	21	25	25	8	13	27	20	0	0
Driveway Sealing	0	0	0	0	14	25	8	13	24	0	0	0
Concrete Pouring	0	0	0	21	25	25	8	13	27	20	0	0
Roof Coating	0	0	0	21	25	25	8	13	27	20	0	0
Lawn Seeding	0	0	19	30	31	26	0	0	27	31	14	0

Which task gets the most weather in Kennewick?

Lawn Seeding178days/yr
Deck Staining139days/yr
Exterior Painting139days/yr
Concrete Pouring139days/yr
Roof Coating139days/yr
Driveway Sealing84days/yr

Season edges differ by task — that's the point of checking six at once. In Kennewick the earliest opener starts around March and the last holdout closes after October. 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 — Kennewick's longest season at 178 workable days.

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Full 10-day checks

Washington

Climatology: NOAA 1991–2020 normals via KENNEWICK, WA US (5.7 km from Kennewick center); live outlook by Open-Meteo.