Hartford, CT Weather & Growing Conditions
Live forecast is briefly unavailable; the local growing information below is from NOAA climate normals.
Growing snapshot for Hartford, CT
Last spring frost
Apr 17
First fall frost
Oct 26
Growing season
191 days
Hardiness zone
6b
Explore more for Hartford, CT: full frost dates · planting calendar · Connecticut frost dates
Climate data from the nearest NOAA station, Hartford Brainard Fld, Ct (4.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.