Lexington, MA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lexington, a community in Middlesex County, Massachusetts.
Today
65°F
Mostly Sunny
Mostly sunny, with a high near 65. Northeast wind around 5 mph.
7-day forecast for Lexington
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 65°F | Mostly Sunny | 5 mph NE | 0% |
| Tonight | 47°F | Partly Cloudy | 1 to 5 mph S | 0% |
| Sunday | 63°F | Mostly Cloudy then Rain Showers | 2 to 6 mph SE | 83% |
| Sunday Night | 51°F | Rain Showers | 5 to 8 mph NE | 82% |
| Monday | 65°F | Partly Sunny | 6 to 9 mph NE | 14% |
| Monday Night | 48°F | Mostly Cloudy | 2 to 7 mph NE | 1% |
| Tuesday | 61°F | Partly Sunny | 9 mph NE | 2% |
| Tuesday Night | 47°F | Mostly Cloudy | 5 to 8 mph NE | 2% |
| Wednesday | 62°F | Partly Sunny | 8 to 14 mph NE | 2% |
| Wednesday Night | 47°F | Mostly Cloudy then Slight Chance Rain Showers | 6 to 10 mph NE | 19% |
| Thursday | 61°F | Chance Rain Showers | 9 to 13 mph NE | 32% |
| Thursday Night | 48°F | Chance Rain Showers | 10 to 14 mph NE | 35% |
| Friday | 62°F | Chance Rain Showers | 14 mph N | 34% |
| Friday Night | 49°F | Chance Rain Showers | 10 to 14 mph NE | 37% |
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 Sep 19, 2026.