Watertown, MA Weather & Growing Conditions
Tonight
49°F
Partly Cloudy
Partly cloudy, with a low around 49. North wind 5 to 9 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Partly Cloudy | 5 to 9 mph N | 0% |
| Saturday | 64°F | Sunny | 6 mph NE | 0% |
| Saturday Night | 46°F | Partly Cloudy | 1 to 6 mph SE | 1% |
| Sunday | 65°F | Rain Showers Likely | 1 to 6 mph SE | 73% |
| Sunday Night | 56°F | Rain Showers | 3 to 8 mph NE | 84% |
| Monday | 65°F | Chance Rain Showers then Partly Sunny | 7 to 10 mph NE | 34% |
| Monday Night | 52°F | Partly Cloudy | 3 to 9 mph NE | 7% |
| Tuesday | 61°F | Partly Sunny | 12 mph NE | 6% |
| Tuesday Night | 51°F | Mostly Cloudy | 6 to 10 mph NE | 3% |
| Wednesday | 61°F | Partly Sunny | 10 to 15 mph NE | 6% |
| Wednesday Night | 50°F | Mostly Cloudy then Slight Chance Rain Showers | 8 to 12 mph NE | 17% |
| Thursday | 60°F | Chance Rain Showers | 14 mph NE | 29% |
| Thursday Night | 51°F | Chance Rain Showers | 8 to 13 mph NE | 38% |
| Friday | 64°F | Chance Rain Showers | 12 mph N | 38% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Watertown, MA
Last spring frost
Apr 19
First fall frost
Oct 23
Growing season
185 days
Hardiness zone
6b
Explore more for Watertown, MA: full frost dates · planting calendar · Massachusetts frost dates
Climate data from the nearest NOAA station, Jamaica Plain, Ma (5.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.