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City guide · California

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.

Six tasks · one forecast · California

MayBest overall month
Deck StainingFriendliest task
1,590 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	—	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 →

City-to-city context helps: browse outdoor project weather in Escondido, CA one stop back, or continue to Folsom, CA’s project calendar.

Project weather, month by month

Workable days per month by task, from NOAA 1991–2020 normals for FAIRFIELD, CA US. Darker = more workable days.
Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
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

Which task gets the most weather in Fairfield?

Deck Staining289days/yr
Exterior Painting289days/yr
Concrete Pouring289days/yr
Roof Coating289days/yr
Lawn Seeding262days/yr
Driveway Sealing172days/yr

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.

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Full 10-day checks

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