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Darien Downtown, CT Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Darien Downtown, a community in Fairfield County, Connecticut.

Today
69°F
Partly Sunny
Partly sunny. High near 69, with temperatures falling to around 67 in the afternoon. East wind around 10 mph.

7-day forecast for Darien Downtown

WhenTempForecastWindPrecip
Today 69°F Partly Sunny 10 mph E 0%
Tonight 56°F Mostly Cloudy 7 mph SE 2%
Sunday 69°F Rain 9 mph SE 92%
Sunday Night 55°F Rain 6 to 13 mph SE 92%
Monday 68°F Chance Light Rain then Mostly Cloudy 8 to 13 mph NE 29%
Monday Night 51°F Mostly Cloudy then Slight Chance Rain Showers 8 to 12 mph NE 20%
Tuesday 64°F Chance Rain Showers 12 to 15 mph NE 25%
Tuesday Night 50°F Slight Chance Rain Showers then Mostly Cloudy 13 to 16 mph NE 23%
Wednesday 65°F Slight Chance Rain Showers 18 mph NE 18%
Wednesday Night 50°F Chance Rain Showers 20 mph NE 31%
Thursday 64°F Chance Rain Showers 20 mph NE 31%
Thursday Night 50°F Chance Rain Showers 18 mph NE 39%
Friday 65°F Chance Rain Showers 17 mph N 38%
Friday Night 51°F Chance Rain Showers 17 mph N 34%

Forecast source: National Weather Service (api.weather.gov) for Darien Downtown (41.077, -73.470). Updated through the day.

Growing snapshot for Darien Downtown

Last spring frost
Apr 17
First fall frost
Oct 23
Growing season
188 days
Hardiness zone
7a

More local growing data for Darien Downtown: nearby ZIP 06820 weather · frost dates · planting calendar · Connecticut frost dates

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Climate data from the nearest NOAA station, Stamford 5 N, Ct (4.9 mi from Darien Downtown). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.