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City guide · California

Outdoor Project Weather in San Bernardino, CA

One forecast, six label checks. Today's verdict for every task in San Bernardino loads above; the matrix below shows the whole year at a glance, computed from NOAA 1991–2020 normals at Redlands, Ca Us. The friendliest calendar here belongs to lawn seeding (242 workable days a year).

Six tasks · one forecast · California

MayBest overall month
Lawn SeedingFriendliest task
1,183 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	—	Oct, May, Nov	Stain a Deck in San Bernardino →
Exterior Painting	—	Oct, May, Nov	Paint Outside in San Bernardino →
Driveway Sealing	—	May, Oct, Jun	Seal a Driveway in San Bernardino →
Concrete Pouring	—	Oct, May, Nov	Pour Concrete in San Bernardino →
Roof Coating	—	Oct, May, Nov	Coat a Roof in San Bernardino →
Lawn Seeding	—	Jan, Mar, May	Seed a Lawn in San Bernardino →

Keep the tour going — compare this calendar with Salinas, CA behind you or San Buenaventura, CA up next.

Project weather, month by month

Workable days per month by task, from NOAA 1991–2020 normals for REDLANDS, CA US. Darker = more workable days.
Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deck Staining	24	21	25	26	28	18	0	0	7	28	26	12
Exterior Painting	24	21	25	26	28	18	0	0	7	28	26	12
Driveway Sealing	0	0	0	2	28	18	0	0	7	26	0	0
Concrete Pouring	24	21	25	26	28	18	0	0	7	28	26	12
Roof Coating	24	21	25	26	28	18	0	0	7	28	26	12
Lawn Seeding	31	29	31	30	31	5	0	0	0	24	30	31

Which task gets the most weather in San Bernardino?

Lawn Seeding242days/yr
Deck Staining215days/yr
Exterior Painting215days/yr
Concrete Pouring215days/yr
Roof Coating215days/yr
Driveway Sealing81days/yr

The composite season in San Bernardino opens around May and closes after June: coatings wait on warm nights, concrete on freeze-free 48-hour stretches, seeding on the 55–80°F germination band. Between those bookends, the right question is which task fits this week — which is what the verdicts above answer.

Deepest calendar first: start with lawn seeding in San Bernardino (242 workable days a year), then work down the matrix.

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Full 10-day checks

California

Climatology: NOAA 1991–2020 normals via REDLANDS, CA US (14.8 km from San Bernardino center); live outlook by Open-Meteo.