WorkWindow

Outdoor Project Weather in Longmont, CO

One forecast, six label checks. Today's verdict for every task in Longmont loads above; the matrix below shows the whole year at a glance, computed from NOAA 1991–2020 normals at Longmont 2 Ese, Co Us. The friendliest calendar here belongs to lawn seeding (90 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, Sep, Jun Stain a Deck in Longmont →
Exterior Painting — Aug, Sep, Jun Paint Outside in Longmont →
Driveway Sealing — Aug, Jun, Sep Seal a Driveway in Longmont →
Concrete Pouring — Aug, Sep, Jun Pour Concrete in Longmont →
Roof Coating — Aug, Sep, Jun Coat a Roof in Longmont →
Lawn Seeding — May, Sep, Jun Seed a Lawn in Longmont →

Project weather, month by month

Workable days per month by task, from NOAA 1991–2020 normals for LONGMONT 2 ESE, CO US. Darker = more workable days.
TaskJanFebMarAprMayJunJulAugSepOctNovDec
Deck Staining 0 0 0 0 14 22 3 22 22 0 0 0
Exterior Painting 0 0 0 0 14 22 3 22 22 0 0 0
Driveway Sealing 0 0 0 0 0 13 3 22 4 0 0 0
Concrete Pouring 0 0 0 0 14 22 3 22 22 0 0 0
Roof Coating 0 0 0 0 14 22 3 22 22 0 0 0
Lawn Seeding 0 0 0 3 31 18 0 0 29 9 0 0

The composite season in Longmont opens around May and closes after June: coatings wait on warm nights, concrete on freeze-free 48-hour stretches, seeding on the 55–80°F germination band. Between those bookends, the right question is which task fits this week — which is what the verdicts above answer.

Deepest calendar first: start with lawn seeding in Longmont (90 workable days a year), then work down the matrix.

Full 10-day checks

Colorado

Climatology: NOAA 1991–2020 normals via LONGMONT 2 ESE, CO US (2.0 km from Longmont center); live outlook by Open-Meteo.