WorkWindow

Outdoor Project Weather in Fairfield, CA

This page runs Fairfield'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: 289 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, Sep Stain a Deck in Fairfield →
Exterior Painting — Jul, Aug, Sep Paint Outside in Fairfield →
Driveway Sealing — Jul, Aug, Sep Seal a Driveway in Fairfield →
Concrete Pouring — Jul, Aug, Sep Pour Concrete in Fairfield →
Roof Coating — Jul, Aug, Sep Coat a Roof in Fairfield →
Lawn Seeding — Jan, Mar, May Seed a Lawn in Fairfield →

Project weather, month by month

Workable days per month by task, from NOAA 1991–2020 normals for FAIRFIELD, CA US. Darker = more workable days.
TaskJanFebMarAprMayJunJulAugSepOctNovDec
Deck Staining 14 19 22 25 28 29 31 31 29 28 23 10
Exterior Painting 14 19 22 25 28 29 31 31 29 28 23 10
Driveway Sealing 0 0 0 0 27 29 31 31 29 25 0 0
Concrete Pouring 14 19 22 25 28 29 31 31 29 28 23 10
Roof Coating 14 19 22 25 28 29 31 31 29 28 23 10
Lawn Seeding 31 29 31 30 31 13 0 0 5 31 30 31

Season edges differ by task — that's the point of checking six at once. In Fairfield 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 — Fairfield's longest season at 289 workable days.

Full 10-day checks

California

Climatology: NOAA 1991–2020 normals via FAIRFIELD, CA US (3.4 km from Fairfield center); live outlook by Open-Meteo.