WorkWindow

Outdoor Project Weather in Billings, MT

This page runs Billings'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: 143 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 Billings →
Exterior Painting — Aug, Jul, Sep Paint Outside in Billings →
Driveway Sealing — Aug, Jul, Jun Seal a Driveway in Billings →
Concrete Pouring — Aug, Jul, Sep Pour Concrete in Billings →
Roof Coating — Aug, Jul, Sep Coat a Roof in Billings →
Lawn Seeding — May, Jun, Sep Seed a Lawn in Billings →

Project weather, month by month

Workable days per month by task, from NOAA 1991–2020 normals for BILLINGS LOGAN INTL AP, MT US. Darker = more workable days.
TaskJanFebMarAprMayJunJulAugSepOctNovDec
Deck Staining 0 0 0 0 16 19 23 25 23 6 0 0
Exterior Painting 0 0 0 0 16 19 23 25 23 6 0 0
Driveway Sealing 0 0 0 0 0 17 23 25 9 0 0 0
Concrete Pouring 0 0 0 0 16 19 23 25 23 6 0 0
Roof Coating 0 0 0 0 16 19 23 25 23 6 0 0
Lawn Seeding 0 0 0 13 31 30 6 12 30 21 0 0

Season edges differ by task — that's the point of checking six at once. In Billings 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 — Billings's longest season at 143 workable days.

Full 10-day checks

Montana

Climatology: NOAA 1991–2020 normals via BILLINGS LOGAN INTL AP, MT US (2.1 km from Billings center); live outlook by Open-Meteo.