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City guide · Massachusetts

Outdoor Project Weather in Somerville, MA

This page runs Somerville'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: 235 workable days a year.

Six tasks · one forecast · Massachusetts

AugustBest overall month
Lawn SeedingFriendliest task
886 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	—	Aug, Jul, Sep	Stain a Deck in Somerville →
Exterior Painting	—	Aug, Jul, Sep	Paint Outside in Somerville →
Driveway Sealing	—	Aug, Jul, Sep	Seal a Driveway in Somerville →
Concrete Pouring	—	Aug, Jul, Sep	Pour Concrete in Somerville →
Roof Coating	—	Aug, Jul, Sep	Coat a Roof in Somerville →
Lawn Seeding	—	May, Jul, Aug	Seed a Lawn in Somerville →

Neighbors on the route: Quincy, MA’s outdoor work windows and Springfield, MA’s six-task outlook.

Project weather, month by month

Workable days per month by task, from NOAA 1991–2020 normals for BOSTON LOGAN INTL AP, MA US. Darker = more workable days.
Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deck Staining	0	0	0	10	19	19	21	22	21	21	5	0
Exterior Painting	0	0	0	10	19	19	21	22	21	21	5	0
Driveway Sealing	0	0	0	0	11	19	21	22	21	5	0	0
Concrete Pouring	0	0	0	10	19	19	21	22	21	21	5	0
Roof Coating	0	0	0	10	19	19	21	22	21	21	5	0
Lawn Seeding	0	0	1	30	31	30	31	31	30	31	20	0

Which task gets the most weather in Somerville?

Lawn Seeding235days/yr
Deck Staining138days/yr
Exterior Painting138days/yr
Concrete Pouring138days/yr
Roof Coating138days/yr
Driveway Sealing99days/yr

Season edges differ by task — that's the point of checking six at once. In Somerville the earliest opener starts around April and the last holdout closes after November. 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 — Somerville's longest season at 235 workable days.

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Full 10-day checks

Massachusetts

Climatology: NOAA 1991–2020 normals via BOSTON LOGAN INTL AP, MA US (8.2 km from Somerville center); live outlook by Open-Meteo.