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 = 'colchester' and st_surl='connecticut' and iso_cc = 'US' and prim_loc in (1,2) Colchester Connecticut Climate Data - Updated February 2026

Colchester Connecticut Climate Data

Monthly Average Climate Data for Colchester Connecticut

Switch Data to Celsius/Metric Units

Month	Avg. Low	Avg. High	Avg. Precip
January	18.8 °F	36.3 °F	3.92 in.
February	19.9 °F	38.8 °F	3.36 in.
March	27.3 °F	46.5 °F	4.64 in.
April	37.0 °F	58.7 °F	4.52 in.
May	46.7 °F	68.8 °F	3.7 in.
June	56.2 °F	77.2 °F	4.27 in.
July	61.9 °F	82.4 °F	3.87 in.
August	60.4 °F	81.1 °F	4.33 in.
September	52.7 °F	74.3 °F	4.58 in.
October	41.7 °F	62.8 °F	4.95 in.
November	32.2 °F	51.7 °F	4.1 in.
December	24.8 °F	41.9 °F	4.7 in.
Annual	40 °F	60 °F	50.94 in.

Climate Data for Colchester Connecticut

Average First Frost Date	Oct. 11 - Oct. 20
Average Last Frost Date	Apr. 21 - Apr. 30
Average Days With Frost	100-125 Days
Plant Hardiness Zone	Zone 6b : -5°F to 0°F
Plant Hardiness Zone - 2012	Zone 6a : -10°F to -5°F
Current Drought Conditions	Moderate Drought
Köppen Climate Classification	Dfb - Humid Continental Mild Summer, Wet All Year

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