Skip to content

City guide · District of Columbia

Outdoor Project Weather in Washington, DC

This page runs Washington'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. Lawn Seeding gets the most calendar here: 180 workable days a year.

Six tasks · one forecast · District of Columbia

SeptemberBest overall month
Lawn SeedingFriendliest task
881 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, Aug, Sep	Stain a Deck in Washington →
Exterior Painting	—	Oct, Aug, Sep	Paint Outside in Washington →
Driveway Sealing	—	Aug, Sep, May	Seal a Driveway in Washington →
Concrete Pouring	—	Oct, Aug, Sep	Pour Concrete in Washington →
Roof Coating	—	Oct, Aug, Sep	Coat a Roof in Washington →
Lawn Seeding	—	May, Oct, Apr	Seed a Lawn in Washington →

City-to-city context helps: browse outdoor project weather in Dover, DE one stop back, or continue to Alafaya, FL’s project calendar.

Project weather, month by month

Workable days per month by task, from NOAA 1991–2020 normals for NATL ARBORETUM DC, MD US. Darker = more workable days.
Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deck Staining	0	0	3	18	19	19	17	21	21	22	8	0
Exterior Painting	0	0	3	18	19	19	17	21	21	22	8	0
Driveway Sealing	0	0	0	3	19	19	17	21	21	9	0	0
Concrete Pouring	0	0	3	18	19	19	17	21	21	22	8	0
Roof Coating	0	0	3	18	19	19	17	21	21	22	8	0
Lawn Seeding	0	0	21	30	31	13	0	0	24	31	30	0

Which task gets the most weather in Washington?

Lawn Seeding180days/yr
Deck Staining148days/yr
Exterior Painting148days/yr
Concrete Pouring148days/yr
Roof Coating148days/yr
Driveway Sealing109days/yr

Season edges differ by task — that's the point of checking six at once. In Washington the earliest opener starts around March and the last holdout closes after October. 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 lawn seeding — Washington's longest season at 180 workable days.

People also search for

Full 10-day checks

District of Columbia

Climatology: NOAA 1991–2020 normals via NATL ARBORETUM DC, MD US (4.1 km from Washington center); live outlook by Open-Meteo.