Massachusetts cities today
Estimated daily average soil temperature at 2 inches, the difference from normal for the date, and the change over the last week. Massachusetts spans cool-season grass country.
| City | 2 in | vs normal | Crabgrass window |
|---|---|---|---|
| Boston | 57° | +6° | Apr 16 – May 3 |
| Worcester | 53° | +7° | Apr 17 – May 5 |
| Springfield | 50° | +4° | Apr 16 – May 4 |
| Lowell | 54° | +6° | Apr 17 – May 2 |
| New Bedford | 52° | +4° | Apr 21 – May 8 |
When to apply pre-emergent in Massachusetts
Crabgrass pre-emergent goes down when 2-inch soil holds about 50°F. Across Massachusetts that has typically happened first in Boston, around Apr 16, and last in New Bedford, around Apr 21. The window closes when soil holds 55°F and crabgrass starts sprouting.
- Boston Apr 16 – May 3 8 years in 10Opened between Apr 4 and Apr 25; in 2026 it closed May 8.
- Springfield Apr 16 – May 4 8 years in 10Opened between Apr 5 and Apr 25; in 2026 it closed Apr 17.
- Worcester Apr 17 – May 5 8 years in 10Opened between Apr 5 and Apr 29; in 2026 it closed Apr 18.
- Lowell Apr 17 – May 2 8 years in 10Opened between Apr 5 and Apr 25; in 2026 it closed May 10.
- New Bedford Apr 21 – May 8 8 years in 10Opened between Apr 13 and Apr 29; in 2026 it closed May 18.

Last good week to seed in Massachusetts
Tall fescue and bluegrass seed sprouts best while 4-inch soil is between 55 and 70°F. The typical last day above 55°F:
- Oct 18 Worcester · closed this year
- Oct 20 Springfield · closed this year
- Oct 23 Lowell · closed this year
- Oct 24 New Bedford · closed this year
- Oct 30 Boston · closed this year
What grows in Massachusetts lawns
Crabgrass is the weed spring pre-emergents are timed for. Lawns here are mostly cool-season grasses such as bluegrass and fescue.
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