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Deck Staining Weather in Massachusetts: Best Months by City

Deck Staining season in Massachusetts, city by city: peak months, season boundaries, and annual workable-day counts from NOAA 1991–2020 normals. Boston leads with 139 workable days a year; Springfield runs the shortest at 100.

Across Massachusetts's 14 listed cities, annual workable days for deck staining run from 100 (Springfield) up to 139 (Boston). Every number comes from NOAA 1991–2020 normals scored against the same label ruleset; every city name links to its live 10-day check.

Statewide, August is the strongest month — it tops or ties the table in most listed cities. The live strips on each city page decide the week; this table decides the month. Scoring rules: methodology; the national playbook: the deck staining guide.

Cities in Massachusetts

Peak months and season boundaries from NOAA 1991–2020 normals; season = months with at least 8 workable days.
CityPeak monthsSeasonWorkable days/yr
Boston Aug, Jul, Sep April–October 139
Worcester Aug, Sep, Jul May–October 115
Springfield Jul, Aug, Sep May–October 100
New Bedford Jul, Aug, Jun May–October 108
Cambridge Aug, Jul, Sep April–October 139
Lowell Aug, Sep, Jul May–October 109
Leominster Aug, Jul, Sep May–October 102
Brockton Aug, Jul, Sep May–October 122
Quincy Aug, Sep, Jul May–October 121
Lynn Aug, Jul, Sep May–October 123
Fall River Jul, Aug, Jun May–October 108
Newton Aug, Jul, Sep May–October 109
Lawrence Aug, Jul, Sep May–October 116
Somerville Aug, Jul, Sep April–October 139

The rules behind these numbers

Typical label thresholds for deck staining — the single ruleset used by every check on this page.
CheckThresholdWhy it matters
Air temperature 50–90°F Air temperature while applying and for the first hours of dry time.
Overnight low ≥40°F during the first 24 h Overnight low during the cure window.
Dry before ≤0.05" rain in the prior 24 h; watch back to 48 h Wood must dry out after rain before it can absorb stain.
Dry after <0.05" rain for 24 h after (48 h oil-based formulas want 48 h dry) Water-based stains need roughly 24 dry hours; oil-based closer to 48.
Evening dew-point spread ≥5°F from 6–11 pm Temperature minus dew point from 6 pm to 11 pm. A small spread means dew will settle on fresh stain.
Daytime humidity ≤85% Daytime relative humidity slows dry time.
Wind ≤15 mph (brush or pad only up to 20 mph) Above 15 mph, spraying drifts; above 20 mph, dust and debris land in wet stain.

Always follow your product label — formulas vary. The table above is the typical range across major manufacturers, not a promise about your can.

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