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City guide · California

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.

Six tasks · one forecast · California

MayBest overall month
Deck StainingFriendliest task
1,498 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	—	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 →

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

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.
Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
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

Which task gets the most weather in Upland?

Deck Staining275days/yr
Exterior Painting275days/yr
Concrete Pouring275days/yr
Roof Coating275days/yr
Lawn Seeding264days/yr
Driveway Sealing134days/yr

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.

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Full 10-day checks

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