Derby, CT Weather & Growing Conditions
This Afternoon
80°F
Sunny
Sunny. High near 80, with temperatures falling to around 76 in the afternoon. Northwest wind around 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 80°F | Sunny | 8 mph NW | 0% |
| Tonight | 52°F | Partly Cloudy | 5 to 9 mph N | 0% |
| Saturday | 69°F | Mostly Sunny | 5 to 8 mph E | 0% |
| Saturday Night | 55°F | Mostly Cloudy | 6 mph SE | 3% |
| Sunday | 67°F | Showers And Thunderstorms | 6 to 12 mph SE | 89% |
| Sunday Night | 55°F | Showers And Thunderstorms | 1 to 13 mph S | 89% |
| Monday | 66°F | Chance Rain Showers | 9 to 14 mph NE | 41% |
| Monday Night | 50°F | Slight Chance Rain Showers | 6 to 14 mph NE | 23% |
| Tuesday | 63°F | Slight Chance Rain Showers | 15 mph NE | 24% |
| Tuesday Night | 49°F | Mostly Cloudy | 13 to 16 mph NE | 14% |
| Wednesday | 63°F | Partly Sunny then Slight Chance Rain Showers | 17 mph NE | 15% |
| Wednesday Night | 49°F | Chance Rain Showers | 13 to 16 mph NE | 25% |
| Thursday | 63°F | Chance Rain Showers | 15 to 18 mph NE | 32% |
| Thursday Night | 49°F | Chance Rain Showers | 13 to 17 mph NE | 35% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Derby, CT
Last spring frost
Apr 25
First fall frost
Oct 17
Growing season
175 days
Hardiness zone
6b
Explore more for Derby, CT: full frost dates · planting calendar · Connecticut frost dates
Climate data from the nearest NOAA station, Ansonia 1 Ne, Ct (1.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.