WorkWindow

Outdoor Project Weather in Upland, CA

This page runs Upland'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: 274 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 — May, Jun, Oct Stain a Deck in Upland →
Exterior Painting — May, Jun, Oct Paint Outside in Upland →
Driveway Sealing — May, Jun, Oct Seal a Driveway in Upland →
Concrete Pouring — May, Jun, Oct Pour Concrete in Upland →
Roof Coating — May, Jun, Oct Coat a Roof in Upland →
Lawn Seeding — Jan, Mar, May Seed a Lawn in Upland →

Project weather, month by month

Workable days per month by task, from NOAA 1991–2020 normals for POMONA/FAIRPLEX, CA US. Darker = more workable days.
TaskJanFebMarAprMayJunJulAugSepOctNovDec
Deck Staining 26 23 27 28 30 30 12 0 19 28 26 26
Exterior Painting 26 23 27 28 30 30 12 0 19 28 26 26
Driveway Sealing 0 0 0 11 30 30 12 0 19 28 4 0
Concrete Pouring 26 23 27 28 30 30 12 0 19 28 26 26
Roof Coating 26 23 27 28 30 30 12 0 19 28 26 26
Lawn Seeding 31 29 31 30 31 18 0 0 2 31 30 31

Season edges differ by task — that's the point of checking six at once. In Upland the earliest opener starts around April and the last holdout closes after July. 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 — Upland's longest season at 274 workable days.

Full 10-day checks

California

Climatology: NOAA 1991–2020 normals via POMONA/FAIRPLEX, CA US (10.5 km from Upland center); live outlook by Open-Meteo.