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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

WhenTempForecastWindPrecip
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.