select pnm,lnm,st_cd,st_nm,cnty_id,dm,dm_date,dm_hist,avg_tmax_data,avg_tmin_data,avg_prcp_data,rec_hi_data,rec_lo_data,avg_sndp_data,x,y,ff,lf,fd,hz,er,hz_source,kg,hzd,clim_stn_nm,hz12,hz90, feels_like_min,feels_like_max,days_of_prcp,snow,cloud_cover,humidity,wind_speed from worldtg8_pm.pm_climate_points_namer where surl = 'rocky-hill' and st_surl='connecticut' and iso_cc = 'US' and prim_loc in (1,2) Rocky Hill Connecticut Climate Data - Updated February 2026

Rocky Hill Connecticut Climate Data

Monthly Average Climate Data for Rocky Hill Connecticut

Switch Data to Celsius/Metric Units

Month	Avg. Low	Avg. High	Avg. Precip
January	19.4 °F	36.2 °F	3.77 in.
February	20.6 °F	38.9 °F	3.25 in.
March	28.2 °F	46.8 °F	4.37 in.
April	38.4 °F	59.4 °F	4.19 in.
May	48.5 °F	70.1 °F	3.73 in.
June	57.9 °F	78.6 °F	4.77 in.
July	63.4 °F	84.0 °F	4.15 in.
August	61.8 °F	82.3 °F	4.04 in.
September	54.4 °F	75.1 °F	4.34 in.
October	43.0 °F	63.0 °F	4.94 in.
November	33.3 °F	51.7 °F	3.8 in.
December	25.3 °F	41.6 °F	4.39 in.
Annual	41.2 °F	60.6 °F	49.74 in.

Climate Data for Rocky Hill Connecticut

Average First Frost Date	Oct. 11 - Oct. 20
Average Last Frost Date	Apr. 11 - Apr. 20
Average Days With Frost	75-100 Days
Plant Hardiness Zone	Zone 6b : -5°F to 0°F
Plant Hardiness Zone - 2012	Zone 6b : -5°F to 0°F
Current Drought Conditions	Moderate Drought
Köppen Climate Classification	Dfa - Humid Continental Hot Summers With Year Around Precipitation

2026 plantmaps.com