Lexington, MA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lexington, a community in Middlesex County, Massachusetts.
Today
77°F
Sunny
Sunny. High near 77, with temperatures falling to around 69 in the afternoon. Southwest wind 6 to 9 mph.
7-day forecast for Lexington
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 77°F | Sunny | 6 to 9 mph SW | 3% |
| Tonight | 58°F | Partly Cloudy | 8 mph SW | 2% |
| Thursday | 75°F | Mostly Cloudy | 7 to 12 mph SW | 9% |
| Thursday Night | 62°F | Mostly Cloudy then Chance Light Rain | 6 to 9 mph SW | 40% |
| Friday | 70°F | Light Rain | 5 mph S | 89% |
| Friday Night | 56°F | Light Rain | 5 mph S | 94% |
| Saturday | 65°F | Light Rain Likely | 6 mph N | 67% |
| Saturday Night | 45°F | Chance Light Rain | 7 mph NW | 26% |
| Sunday | 59°F | Slight Chance Light Rain then Mostly Sunny | 6 to 9 mph W | 23% |
| Sunday Night | 38°F | Partly Cloudy | 6 mph W | 6% |
| Monday | 56°F | Sunny then Slight Chance Light Rain | 7 to 10 mph W | 17% |
| Monday Night | 37°F | Partly Cloudy | 7 mph W | 14% |
| Tuesday | 58°F | Mostly Sunny | 7 to 10 mph SW | 7% |
| Tuesday Night | 37°F | Partly Cloudy | 8 mph W | 7% |
Forecast source: National Weather Service (api.weather.gov) for Lexington (42.445, -71.230). Updated through the day.
Growing snapshot for Lexington
Last spring frost
Apr 28
First fall frost
Oct 10
Growing season
165 days
Hardiness zone
6b
More local growing data for Lexington: nearby ZIP 02421 weather · frost dates · planting calendar · Massachusetts frost dates
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Climate data from the nearest NOAA station, Bedford Hanscom Fld, Ma (3.3 mi from Lexington). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.