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City guide · California

Outdoor Project Weather in Alhambra, CA

This page runs Alhambra'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: 333 workable days a year.

Six tasks · one forecast · California

MayBest overall month
Deck StainingFriendliest task
1,857 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	—	Aug, Jul, Sep	Stain a Deck in Alhambra →
Exterior Painting	—	Aug, Jul, Sep	Paint Outside in Alhambra →
Driveway Sealing	—	Aug, Jul, Sep	Seal a Driveway in Alhambra →
Concrete Pouring	—	Aug, Jul, Sep	Pour Concrete in Alhambra →
Roof Coating	—	Aug, Jul, Sep	Coat a Roof in Alhambra →
Lawn Seeding	—	Jan, Mar, May	Seed a Lawn in Alhambra →

Neighbors on the route: Springdale, AR’s outdoor work windows and Anaheim, CA’s six-task outlook.

Project weather, month by month

Workable days per month by task, from NOAA 1991–2020 normals for SAN GABRIEL FIRE DEPT, CA US. Darker = more workable days.
Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deck Staining	25	22	26	27	29	29	31	31	30	29	27	26
Exterior Painting	25	22	26	27	29	29	31	31	30	29	27	26
Driveway Sealing	0	0	19	27	29	29	31	31	30	29	17	0
Concrete Pouring	25	22	26	27	29	29	31	31	30	29	27	26
Roof Coating	25	22	26	27	29	29	31	31	30	29	27	26
Lawn Seeding	31	29	31	30	31	30	6	0	7	31	30	31

Which task gets the most weather in Alhambra?

Deck Staining332days/yr
Exterior Painting332days/yr
Concrete Pouring332days/yr
Roof Coating332days/yr
Lawn Seeding287days/yr
Driveway Sealing242days/yr

Season edges differ by task — that's the point of checking six at once. In Alhambra the earliest opener starts around March 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 deck staining — Alhambra's longest season at 333 workable days.

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Full 10-day checks

California

Climatology: NOAA 1991–2020 normals via SAN GABRIEL FIRE DEPT, CA US (3.2 km from Alhambra center); live outlook by Open-Meteo.