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City guide · Illinois

Outdoor Project Weather in Chicago, IL

One forecast, six label checks. Today's verdict for every task in Chicago loads above; the matrix below shows the whole year at a glance, computed from NOAA 1991–2020 normals at Chicago Midway Ap, Il Us. The friendliest calendar here belongs to lawn seeding (215 workable days a year).

Six tasks · one forecast · Illinois

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

Keep the tour going — compare this calendar with Champaign, IL behind you or Cicero, IL up next.

Project weather, month by month

Workable days per month by task, from NOAA 1991–2020 normals for CHICAGO MIDWAY AP, IL US. Darker = more workable days.
Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deck Staining	0	0	0	12	18	18	21	21	21	20	1	0
Exterior Painting	0	0	0	12	18	18	21	21	21	20	1	0
Driveway Sealing	0	0	0	0	12	18	21	21	21	5	0	0
Concrete Pouring	0	0	0	12	18	18	21	21	21	20	1	0
Roof Coating	0	0	0	12	18	18	21	21	21	20	1	0
Lawn Seeding	0	0	5	30	31	30	14	31	30	31	13	0

Which task gets the most weather in Chicago?

Lawn Seeding215days/yr
Deck Staining132days/yr
Exterior Painting132days/yr
Concrete Pouring132days/yr
Roof Coating132days/yr
Driveway Sealing98days/yr

The composite season in Chicago opens around April 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 Chicago (215 workable days a year), then work down the matrix.

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Full 10-day checks

Illinois

Climatology: NOAA 1991–2020 normals via CHICAGO MIDWAY AP, IL US (8.2 km from Chicago center); live outlook by Open-Meteo.