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City guide · Colorado

Outdoor Project Weather in Grand Junction, CO

This page runs Grand Junction'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: 112 workable days a year.

Six tasks · one forecast · Colorado

MayBest overall month
Lawn SeedingFriendliest task
511 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	—	May, Sep, Jun	Stain a Deck in Grand Junction →
Exterior Painting	—	May, Sep, Jun	Paint Outside in Grand Junction →
Driveway Sealing	—	Sep, Jun, Aug	Seal a Driveway in Grand Junction →
Concrete Pouring	—	May, Sep, Jun	Pour Concrete in Grand Junction →
Roof Coating	—	May, Sep, Jun	Coat a Roof in Grand Junction →
Lawn Seeding	—	May, Apr, Oct	Seed a Lawn in Grand Junction →

Keep the tour going — compare this calendar with Fort Collins, CO behind you or Greeley, CO up next.

Project weather, month by month

Workable days per month by task, from NOAA 1991–2020 normals for GRAND JUNCTION WALKER FLD, CO US. Darker = more workable days.
Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deck Staining	0	0	0	5	25	15	0	9	23	11	0	0
Exterior Painting	0	0	0	5	25	15	0	9	23	11	0	0
Driveway Sealing	0	0	0	0	6	15	0	9	17	0	0	0
Concrete Pouring	0	0	0	5	25	15	0	9	23	11	0	0
Roof Coating	0	0	0	5	25	15	0	9	23	11	0	0
Lawn Seeding	0	0	0	29	31	3	0	0	23	26	0	0

Which task gets the most weather in Grand Junction?

Lawn Seeding112days/yr
Deck Staining88days/yr
Exterior Painting88days/yr
Concrete Pouring88days/yr
Roof Coating88days/yr
Driveway Sealing47days/yr

Season edges differ by task — that's the point of checking six at once. In Grand Junction the earliest opener starts around April and the last holdout closes after October. 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 — Grand Junction's longest season at 112 workable days.

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Full 10-day checks

Colorado

Climatology: NOAA 1991–2020 normals via GRAND JUNCTION WALKER FLD, CO US (5.7 km from Grand Junction center); live outlook by Open-Meteo.