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City guide · Pennsylvania

Outdoor Project Weather in Allentown, PA

This page runs Allentown'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: 184 workable days a year.

Six tasks · one forecast · Pennsylvania

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

City-to-city context helps: browse outdoor project weather in Salem, OR one stop back, or continue to Erie, PA’s project calendar.

Project weather, month by month

Workable days per month by task, from NOAA 1991–2020 normals for ALLENTOWN INTL AP, PA US. Darker = more workable days.
Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deck Staining	0	0	0	10	19	19	20	21	21	18	0	0
Exterior Painting	0	0	0	10	19	19	20	21	21	18	0	0
Driveway Sealing	0	0	0	0	11	19	20	21	20	0	0	0
Concrete Pouring	0	0	0	10	19	19	20	21	21	18	0	0
Roof Coating	0	0	0	10	19	19	20	21	21	18	0	0
Lawn Seeding	0	0	1	30	31	27	0	22	30	31	12	0

Which task gets the most weather in Allentown?

Lawn Seeding184days/yr
Deck Staining128days/yr
Exterior Painting128days/yr
Concrete Pouring128days/yr
Roof Coating128days/yr
Driveway Sealing91days/yr

Season edges differ by task — that's the point of checking six at once. In Allentown the earliest opener starts around April 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 — Allentown's longest season at 184 workable days.

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Full 10-day checks

Pennsylvania

Climatology: NOAA 1991–2020 normals via ALLENTOWN INTL AP, PA US (6.4 km from Allentown center); live outlook by Open-Meteo.