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Lawn Seeding Weather in Massachusetts: Best Months by City

Lawn Seeding season in Massachusetts, city by city: peak months, season boundaries, and annual workable-day counts from NOAA 1991–2020 normals. Boston leads with 235 workable days a year; Springfield runs the shortest at 182.

Across Massachusetts's 14 listed cities, annual workable days for lawn seeding run from 182 (Springfield) up to 235 (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, May 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 lawn seeding 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 May, Jul, Aug April–November 235
Worcester May, Jul, Aug April–October 210
Springfield May, Aug, Jun April–October 182
New Bedford May, Jul, Aug April–November 211
Cambridge May, Jul, Aug April–November 235
Lowell May, Aug, Jun April–October 190
Leominster May, Jul, Aug April–October 198
Brockton May, Jul, Aug April–November 220
Quincy May, Jul, Aug April–November 217
Lynn May, Jul, Aug April–November 209
Fall River May, Jul, Aug April–November 211
Newton May, Jul, Aug April–October 198
Lawrence May, Jul, Aug April–November 219
Somerville May, Jul, Aug April–November 235

The rules behind these numbers

Typical label thresholds for lawn seeding — the single ruleset used by every check on this page.
CheckThresholdWhy it matters
Air temperature 50–85°F (low-temp formulas from 55°F) Cool-season grasses germinate best with daytime highs of roughly 60–80°F.
Overnight low ≥32°F during the first 48 h (≥40°F preferred) Seed survives a light frost, but sustained cold stalls germination.
Dry before no soaking (≥1.0") in the prior 24 h Seeding into mud makes ruts and washes seed into low spots.
Dry after <0.5" rain for 24 h after Light rain after seeding helps. A 0.5"+ downpour washes seed out.
Wind ≤15 mph (broadcast seed drifts up to 25 mph) Broadcast spreading above 15 mph lands seed everywhere but the lawn.

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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