WorkWindow

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.

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.
TaskTodayBest months hereFull 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 →

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.
TaskJanFebMarAprMayJunJulAugSepOctNovDec
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

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.

Full 10-day checks

Colorado

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