WorkWindow

Outdoor Project Weather in Vallejo, CA

This page runs Vallejo'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: 366 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 Vallejo →
Exterior Painting — Jul, Aug, Sep Paint Outside in Vallejo →
Driveway Sealing — Jul, Aug, Jun Seal a Driveway in Vallejo →
Concrete Pouring — Jul, Aug, Sep Pour Concrete in Vallejo →
Roof Coating — Jul, Aug, Sep Coat a Roof in Vallejo →
Lawn Seeding — Jan, Mar, May Seed a Lawn in Vallejo →

Project weather, month by month

Workable days per month by task, from NOAA 1991–2020 normals for NAPA CO AP, CA US. Darker = more workable days.
TaskJanFebMarAprMayJunJulAugSepOctNovDec
Deck Staining 0 10 22 24 28 29 31 31 29 28 13 0
Exterior Painting 0 10 22 24 28 29 31 31 29 28 13 0
Driveway Sealing 0 0 0 0 0 29 31 31 22 0 0 0
Concrete Pouring 0 10 22 24 28 29 31 31 29 28 13 0
Roof Coating 0 10 22 24 28 29 31 31 29 28 13 0
Lawn Seeding 31 29 31 30 31 30 31 31 30 31 30 31

Season edges differ by task — that's the point of checking six at once. In Vallejo 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 — Vallejo's longest season at 366 workable days.

Full 10-day checks

California

Climatology: NOAA 1991–2020 normals via NAPA CO AP, CA US (11.3 km from Vallejo center); live outlook by Open-Meteo.