WorkWindow

Outdoor Project Weather in Napa, CA

One forecast, six label checks. Today's verdict for every task in Napa loads above; the matrix below shows the whole year at a glance, computed from NOAA 1991–2020 normals at Napa State Hospital, Ca Us. The friendliest calendar here belongs to lawn seeding (359 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 — Aug, Jul, Sep Stain a Deck in Napa →
Exterior Painting — Aug, Jul, Sep Paint Outside in Napa →
Driveway Sealing — Aug, Jul, Sep Seal a Driveway in Napa →
Concrete Pouring — Aug, Jul, Sep Pour Concrete in Napa →
Roof Coating — Aug, Jul, Sep Coat a Roof in Napa →
Lawn Seeding — Jan, Mar, May Seed a Lawn in Napa →

Project weather, month by month

Workable days per month by task, from NOAA 1991–2020 normals for NAPA STATE HOSPITAL, CA US. Darker = more workable days.
TaskJanFebMarAprMayJunJulAugSepOctNovDec
Deck Staining 10 18 21 23 27 29 31 31 29 27 22 6
Exterior Painting 10 18 21 23 27 29 31 31 29 27 22 6
Driveway Sealing 0 0 0 0 14 29 31 31 29 11 0 0
Concrete Pouring 10 18 21 23 27 29 31 31 29 27 22 6
Roof Coating 10 18 21 23 27 29 31 31 29 27 22 6
Lawn Seeding 31 29 31 30 31 30 31 31 23 31 30 31

The composite season in Napa opens around January and closes after November: 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 Napa (359 workable days a year), then work down the matrix.

Full 10-day checks

California

Climatology: NOAA 1991–2020 normals via NAPA STATE HOSPITAL, CA US (3.9 km from Napa center); live outlook by Open-Meteo.