Topstone, CT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Topstone, a community in Fairfield County, Connecticut.
This Afternoon
78°F
Sunny
Sunny. High near 78, with temperatures falling to around 74 in the afternoon. North wind around 8 mph.
7-day forecast for Topstone
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 78°F | Sunny | 8 mph N | 0% |
| Tonight | 51°F | Partly Cloudy | 3 to 7 mph N | 0% |
| Saturday | 68°F | Mostly Sunny | 7 mph E | 0% |
| Saturday Night | 55°F | Mostly Cloudy | 2 to 6 mph SE | 13% |
| Sunday | 66°F | Showers And Thunderstorms | 5 to 13 mph SE | 91% |
| Sunday Night | 55°F | Showers And Thunderstorms | 3 to 12 mph E | 91% |
| Monday | 66°F | Chance Rain Showers | 8 to 12 mph N | 38% |
| Monday Night | 50°F | Slight Chance Rain Showers | 7 to 12 mph NE | 24% |
| Tuesday | 61°F | Chance Rain Showers | 13 mph NE | 25% |
| Tuesday Night | 48°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 14 mph NE | 21% |
| Wednesday | 61°F | Mostly Cloudy then Slight Chance Rain Showers | 12 to 15 mph NE | 15% |
| Wednesday Night | 48°F | Chance Rain Showers | 12 to 15 mph NE | 28% |
| Thursday | 61°F | Chance Rain Showers | 12 to 15 mph NE | 29% |
| Thursday Night | 49°F | Chance Rain Showers | 10 to 14 mph NE | 35% |
Forecast source: National Weather Service (api.weather.gov) for Topstone (41.296, -73.447). Updated through the day.
Growing snapshot for Topstone
Last spring frost
May 1
First fall frost
Oct 14
Growing season
166 days
Hardiness zone
6b
More local growing data for Topstone: nearby ZIP 06896 weather · frost dates · planting calendar · Connecticut frost dates
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Candlewood Orchards
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Coleytown
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Darien Downtown
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Fairfield University
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Climate data from the nearest NOAA station, Danbury Muni Ap, Ct (6.5 mi from Topstone). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.