Lexington, MA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lexington, a community in Middlesex County, Massachusetts.
Overnight
61°F
Clear
Clear, with a low around 61. West wind around 7 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Lexington
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Clear | 7 mph W | 2% |
| Tuesday | 84°F | Sunny | 6 mph W | 0% |
| Tuesday Night | 62°F | Partly Cloudy | 6 mph SW | 1% |
| Wednesday | 84°F | Mostly Sunny | 2 to 7 mph W | 1% |
| Wednesday Night | 67°F | Partly Cloudy | 6 mph SW | 6% |
| Thursday | 88°F | Mostly Sunny then Slight Chance Rain Showers | 5 to 8 mph SW | 18% |
| Thursday Night | 72°F | Slight Chance Rain Showers then Partly Cloudy | 7 mph SW | 23% |
| Friday | 90°F | Mostly Sunny then Slight Chance Rain Showers | 5 to 8 mph SW | 20% |
| Friday Night | 71°F | Chance Rain Showers | 3 to 7 mph W | 28% |
| Saturday | 88°F | Mostly Sunny then Chance Rain Showers | 3 to 7 mph W | 31% |
| Saturday Night | 70°F | Chance Rain Showers | 6 mph SW | 42% |
| Sunday | 88°F | Mostly Sunny | 3 to 8 mph W | 12% |
| Sunday Night | 70°F | Mostly Clear | 5 to 8 mph SW | 14% |
| Monday | 89°F | Sunny | 5 to 10 mph SW | 9% |
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 Aug 4, 2026.