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City guide · Washington

Outdoor Project Weather in Seattle, WA

One forecast, six label checks. Today's verdict for every task in Seattle loads above; the matrix below shows the whole year at a glance, computed from NOAA 1991–2020 normals at Seattle Boeing Fld, Wa Us. The friendliest calendar here belongs to lawn seeding (295 workable days a year).

Six tasks · one forecast · Washington

JulyBest overall month
Lawn SeedingFriendliest task
1,038 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	—	Jul, Aug, Jun	Stain a Deck in Seattle →
Exterior Painting	—	Jul, Aug, Jun	Paint Outside in Seattle →
Driveway Sealing	—	Jul, Aug, Jun	Seal a Driveway in Seattle →
Concrete Pouring	—	Jul, Aug, Jun	Pour Concrete in Seattle →
Roof Coating	—	Jul, Aug, Jun	Coat a Roof in Seattle →
Lawn Seeding	—	Mar, May, Jul	Seed a Lawn in Seattle →

Keep the tour going — compare this calendar with Renton, WA behind you or Spokane, WA up next.

Project weather, month by month

Workable days per month by task, from NOAA 1991–2020 normals for SEATTLE BOEING FLD, WA US. Darker = more workable days.
Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deck Staining	0	0	5	15	19	22	27	27	22	16	6	0
Exterior Painting	0	0	5	15	19	22	27	27	22	16	6	0
Driveway Sealing	0	0	0	0	8	22	27	27	22	1	0	0
Concrete Pouring	0	0	5	15	19	22	27	27	22	16	6	0
Roof Coating	0	0	5	15	19	22	27	27	22	16	6	0
Lawn Seeding	0	22	31	30	31	30	31	31	30	31	28	0

Which task gets the most weather in Seattle?

Lawn Seeding295days/yr
Deck Staining159days/yr
Exterior Painting159days/yr
Concrete Pouring159days/yr
Roof Coating159days/yr
Driveway Sealing107days/yr

The composite season in Seattle opens around February 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 Seattle (295 workable days a year), then work down the matrix.

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Full 10-day checks

Washington

Climatology: NOAA 1991–2020 normals via SEATTLE BOEING FLD, WA US (8.4 km from Seattle center); live outlook by Open-Meteo.