Topstone, CT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Topstone, a community in Fairfield County, Connecticut.
This Afternoon
71°F
Sunny
Sunny. High near 71, with temperatures falling to around 65 in the afternoon. South wind around 8 mph.
7-day forecast for Topstone
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Sunny | 8 mph S | 0% |
| Tonight | 56°F | Partly Cloudy | 6 mph S | 3% |
| Thursday | 70°F | Light Rain Likely | 5 to 10 mph S | 56% |
| Thursday Night | 60°F | Light Rain Likely | 2 to 7 mph SW | 63% |
| Friday | 69°F | Light Rain Likely | 1 to 5 mph SW | 63% |
| Friday Night | 50°F | Light Rain Likely | 3 mph NW | 58% |
| Saturday | 65°F | Mostly Sunny then Slight Chance Light Rain | 5 to 8 mph NW | 18% |
| Saturday Night | 42°F | Chance Light Rain | 7 to 12 mph NW | 31% |
| Sunday | 59°F | Chance Light Rain then Mostly Sunny | 8 to 13 mph NW | 31% |
| Sunday Night | 39°F | Partly Cloudy | 7 to 10 mph W | 0% |
| Monday | 57°F | Sunny | 10 to 14 mph W | 6% |
| Monday Night | 37°F | Mostly Clear | 8 mph W | 6% |
| Tuesday | 61°F | Mostly Sunny | 8 to 12 mph W | 1% |
| Tuesday Night | 37°F | Mostly Clear | 5 to 8 mph W | 1% |
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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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 Nov 4, 2026.