WorkWindow

Outdoor Project Weather in Missoula, MT

This page runs Missoula'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: 137 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 — Aug, Jul, Sep Stain a Deck in Missoula →
Exterior Painting — Aug, Jul, Sep Paint Outside in Missoula →
Driveway Sealing — Jul, Aug Seal a Driveway in Missoula →
Concrete Pouring — Aug, Jul, Sep Pour Concrete in Missoula →
Roof Coating — Aug, Jul, Sep Coat a Roof in Missoula →
Lawn Seeding — May, Jun, Sep Seed a Lawn in Missoula →

Project weather, month by month

Workable days per month by task, from NOAA 1991–2020 normals for MISSOULA 2 NE, MT US. Darker = more workable days.
TaskJanFebMarAprMayJunJulAugSepOctNovDec
Deck Staining 0 0 0 0 11 17 24 24 20 0 0 0
Exterior Painting 0 0 0 0 11 17 24 24 20 0 0 0
Driveway Sealing 0 0 0 0 0 0 22 17 0 0 0 0
Concrete Pouring 0 0 0 0 11 17 24 24 20 0 0 0
Roof Coating 0 0 0 0 11 17 24 24 20 0 0 0
Lawn Seeding 0 0 0 4 31 30 13 18 30 11 0 0

Season edges differ by task — that's the point of checking six at once. In Missoula the earliest opener starts around May 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 — Missoula's longest season at 137 workable days.

Full 10-day checks

Montana

Climatology: NOAA 1991–2020 normals via MISSOULA 2 NE, MT US (4.8 km from Missoula center); live outlook by Open-Meteo.