Lexington, MA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lexington, a community in Middlesex County, Massachusetts.
This Afternoon
67°F
Mostly Sunny
Mostly sunny, with a high near 67. East wind around 5 mph.
7-day forecast for Lexington
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Mostly Sunny | 5 mph E | 0% |
| Tonight | 44°F | Partly Cloudy | 0 to 6 mph S | 0% |
| Sunday | 63°F | Rain Showers | 1 to 7 mph SE | 100% |
| Sunday Night | 53°F | Rain Showers | 5 to 10 mph NE | 100% |
| Monday | 67°F | Slight Chance Rain Showers then Partly Sunny | 6 to 9 mph NE | 17% |
| Monday Night | 49°F | Mostly Cloudy | 2 to 6 mph NE | 1% |
| Tuesday | 62°F | Partly Sunny | 6 to 9 mph NE | 2% |
| Tuesday Night | 48°F | Partly Cloudy | 5 to 8 mph NE | 1% |
| Wednesday | 63°F | Mostly Sunny | 8 to 13 mph NE | 2% |
| Wednesday Night | 48°F | Mostly Cloudy then Slight Chance Rain Showers | 6 to 9 mph NE | 15% |
| Thursday | 62°F | Slight Chance Rain Showers | 8 to 13 mph NE | 24% |
| Thursday Night | 49°F | Chance Rain Showers | 8 to 13 mph NE | 36% |
| Friday | 63°F | Chance Rain Showers | 14 mph NE | 41% |
| Friday Night | 50°F | Chance Rain Showers | 12 to 15 mph N | 43% |
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.