Skip to content

City guide · Pennsylvania

Outdoor Project Weather in Philadelphia, PA

This page runs Philadelphia'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: 191 workable days a year.

Six tasks · one forecast · Pennsylvania

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

Keep the tour going — compare this calendar with Lancaster, PA behind you or Pittsburgh, PA up next.

Project weather, month by month

Workable days per month by task, from NOAA 1991–2020 normals for PHILA FRANKLIN INST, PA US. Darker = more workable days.
Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deck Staining	0	0	2	18	19	19	21	22	21	22	14	0
Exterior Painting	0	0	2	18	19	19	21	22	21	22	14	0
Driveway Sealing	0	0	0	3	19	19	21	22	21	13	0	0
Concrete Pouring	0	0	2	18	19	19	21	22	21	22	14	0
Roof Coating	0	0	2	18	19	19	21	22	21	22	14	0
Lawn Seeding	0	0	21	30	31	15	0	0	30	31	30	3

Which task gets the most weather in Philadelphia?

Lawn Seeding191days/yr
Deck Staining158days/yr
Exterior Painting158days/yr
Concrete Pouring158days/yr
Roof Coating158days/yr
Driveway Sealing118days/yr

Season edges differ by task — that's the point of checking six at once. In Philadelphia the earliest opener starts around March and the last holdout closes after November. 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 — Philadelphia's longest season at 191 workable days.

People also search for

Full 10-day checks

Pennsylvania

Climatology: NOAA 1991–2020 normals via PHILA FRANKLIN INST, PA US (6.4 km from Philadelphia center); live outlook by Open-Meteo.