Greenwich, CT Weather & Growing Conditions
This Afternoon
68°F
Mostly Sunny
Mostly sunny. High near 68, with temperatures falling to around 64 in the afternoon. South wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Mostly Sunny | 7 mph S | 0% |
| Tonight | 50°F | Patchy Fog | 5 mph SW | 3% |
| Wednesday | 72°F | Patchy Fog then Sunny | 3 to 10 mph SW | 3% |
| Wednesday Night | 56°F | Partly Cloudy | 3 to 7 mph S | 2% |
| Thursday | 71°F | Chance Rain Showers | 3 to 9 mph S | 43% |
| Thursday Night | 60°F | Rain Showers | 3 to 7 mph S | 82% |
| Friday | 68°F | Showers And Thunderstorms | 5 mph S | 84% |
| Friday Night | 53°F | Showers And Thunderstorms then Light Rain Likely | 5 mph W | 84% |
| Saturday | 66°F | Chance Light Rain | 8 mph NW | 51% |
| Saturday Night | 43°F | Slight Chance Light Rain | 8 mph NW | 19% |
| Sunday | 61°F | Slight Chance Light Rain then Mostly Sunny | 8 mph W | 18% |
| Sunday Night | 39°F | Partly Cloudy | 7 mph W | 14% |
| Monday | 60°F | Slight Chance Light Rain | 8 to 14 mph NW | 24% |
| Monday Night | 39°F | Chance Light Rain | 9 mph W | 27% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Greenwich, CT
Last spring frost
Apr 12
First fall frost
Oct 31
Growing season
200 days
Hardiness zone
7a
Explore more for Greenwich, CT: full frost dates · planting calendar · Connecticut frost dates
Climate data from the nearest NOAA station, Westchester Co Ap, Ny (4.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.