Derby, CT Weather & Growing Conditions
Overnight
50°F
Patchy Fog
Patchy fog. Partly cloudy, with a low around 50. Southwest wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 50°F | Patchy Fog | 2 mph SW | 3% |
| Wednesday | 72°F | Patchy Fog then Sunny | 2 to 12 mph SW | 3% |
| Wednesday Night | 55°F | Partly Cloudy | 2 to 6 mph S | 2% |
| Thursday | 71°F | Chance Rain Showers | 3 to 10 mph S | 30% |
| Thursday Night | 60°F | Rain Showers | 2 to 7 mph SW | 82% |
| Friday | 68°F | Showers And Thunderstorms | 2 to 6 mph S | 86% |
| Friday Night | 54°F | Showers And Thunderstorms | 1 to 5 mph W | 86% |
| Saturday | 66°F | Rain Showers Likely | 8 mph NW | 55% |
| Saturday Night | 42°F | Slight Chance Rain Showers | 8 mph NW | 21% |
| Sunday | 61°F | Slight Chance Rain Showers then Mostly Sunny | 6 to 9 mph W | 21% |
| Sunday Night | 38°F | Partly Cloudy | 5 to 8 mph W | 14% |
| Monday | 59°F | Chance Light Rain | 9 to 14 mph NW | 26% |
| Monday Night | 37°F | Chance Light Rain | 10 mph W | 26% |
| Tuesday | 60°F | Slight Chance Light Rain then Mostly Sunny | 12 to 15 mph W | 20% |
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 Nov 4, 2026.