Putnam, CT Weather & Growing Conditions
Today
68°F
Mostly Sunny
Mostly sunny, with a high near 68. Northeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 68°F | Mostly Sunny | 5 mph NE | 0% |
| Tonight | 48°F | Partly Cloudy | 3 mph E | 0% |
| Sunday | 63°F | Mostly Cloudy then Rain Showers | 2 to 7 mph SE | 81% |
| Sunday Night | 51°F | Rain Showers | 5 to 10 mph E | 80% |
| Monday | 66°F | Partly Sunny | 7 to 12 mph N | 13% |
| Monday Night | 46°F | Mostly Cloudy | 3 to 8 mph NE | 2% |
| Tuesday | 62°F | Mostly Cloudy | 8 to 12 mph NE | 5% |
| Tuesday Night | 45°F | Mostly Cloudy | 6 to 9 mph NE | 3% |
| Wednesday | 63°F | Partly Sunny | 10 to 16 mph NE | 4% |
| Wednesday Night | 45°F | Mostly Cloudy then Slight Chance Rain Showers | 9 to 14 mph NE | 23% |
| Thursday | 62°F | Chance Rain Showers | 17 mph NE | 33% |
| Thursday Night | 46°F | Chance Rain Showers | 16 mph NE | 36% |
| Friday | 63°F | Chance Rain Showers | 17 mph N | 34% |
| Friday Night | 47°F | Chance Rain Showers | 13 to 16 mph NE | 35% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Putnam, CT
Last spring frost
May 1
First fall frost
Oct 9
Growing season
161 days
Hardiness zone
6b
Explore more for Putnam, CT: full frost dates · planting calendar · Connecticut frost dates
Climate data from the nearest NOAA station, W Thompson Lake, Ct (3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.