WorkWindow

Outdoor Project Weather in Concord, CA

This page runs Concord'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. Deck Staining gets the most calendar here: 309 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 Concord →
Exterior Painting — Jul, Aug, Jun Paint Outside in Concord →
Driveway Sealing — Jul, Aug, Jun Seal a Driveway in Concord →
Concrete Pouring — Jul, Aug, Jun Pour Concrete in Concord →
Roof Coating — Jul, Aug, Jun Coat a Roof in Concord →
Lawn Seeding — Jan, Mar, May Seed a Lawn in Concord →

Project weather, month by month

Workable days per month by task, from NOAA 1991–2020 normals for CONCORD BUCHANAN FLD, CA US. Darker = more workable days.
TaskJanFebMarAprMayJunJulAugSepOctNovDec
Deck Staining 22 20 22 25 28 29 31 31 29 28 24 22
Exterior Painting 22 20 22 25 28 29 31 31 29 28 24 22
Driveway Sealing 0 0 0 5 28 29 31 31 29 24 0 0
Concrete Pouring 22 20 22 25 28 29 31 31 29 28 24 22
Roof Coating 22 20 22 25 28 29 31 31 29 28 24 22
Lawn Seeding 31 29 31 30 31 18 0 0 13 31 30 31

Season edges differ by task — that's the point of checking six at once. In Concord the earliest opener starts around May 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 deck staining — Concord's longest season at 309 workable days.

Full 10-day checks

California

Climatology: NOAA 1991–2020 normals via CONCORD BUCHANAN FLD, CA US (5.0 km from Concord center); live outlook by Open-Meteo.