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City guide · Colorado

Outdoor Project Weather in Denver, CO

This page runs Denver'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: 103 workable days a year.

Six tasks · one forecast · Colorado

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

City-to-city context helps: browse outdoor project weather in Colorado Springs, CO one stop back, or continue to Fort Collins, CO’s project calendar.

Project weather, month by month

Workable days per month by task, from NOAA 1991–2020 normals for DENVER-STAPLETON, CO US. Darker = more workable days.
Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deck Staining	0	0	0	0	17	21	7	22	24	3	0	0
Exterior Painting	0	0	0	0	17	21	7	22	24	3	0	0
Driveway Sealing	0	0	0	0	0	19	7	22	9	0	0	0
Concrete Pouring	0	0	0	0	17	21	7	22	24	3	0	0
Roof Coating	0	0	0	0	17	21	7	22	24	3	0	0
Lawn Seeding	0	0	0	9	31	17	0	0	29	17	0	0

Which task gets the most weather in Denver?

Lawn Seeding103days/yr
Deck Staining94days/yr
Exterior Painting94days/yr
Concrete Pouring94days/yr
Roof Coating94days/yr
Driveway Sealing57days/yr

Season edges differ by task — that's the point of checking six at once. In Denver the earliest opener starts around April and the last holdout closes after September. 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 — Denver's longest season at 103 workable days.

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Full 10-day checks

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Climatology: NOAA 1991–2020 normals via DENVER-STAPLETON, CO US (0.6 km from Denver center); live outlook by Open-Meteo.