WorkWindow

Outdoor Project Weather in San Leandro, CA

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

Project weather, month by month

Workable days per month by task, from NOAA 1991–2020 normals for HAYWARD AIR TERMINAL, CA US. Darker = more workable days.
TaskJanFebMarAprMayJunJulAugSepOctNovDec
Deck Staining 21 20 22 24 28 29 31 31 29 28 23 21
Exterior Painting 21 20 22 24 28 29 31 31 29 28 23 21
Driveway Sealing 0 0 0 8 28 29 31 31 29 28 2 0
Concrete Pouring 21 20 22 24 28 29 31 31 29 28 23 21
Roof Coating 21 20 22 24 28 29 31 31 29 28 23 21
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 San Leandro 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 lawn seeding — San Leandro's longest season at 366 workable days.

Full 10-day checks

California

Climatology: NOAA 1991–2020 normals via HAYWARD AIR TERMINAL, CA US (6.4 km from San Leandro center); live outlook by Open-Meteo.