Historical weather data, all-time temperature records, and monthly climate averages for Avon, CT. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Avon sits right on that edge-of-spring knife's edge — average highs of 52° with lows still dipping to freezing. Across 90 years of records, the date has swung wildly from a balmy 75° in 1974 to a brutal 16° in 1995, so don't put the coat away just yet.
Avon's weather has teeth on both ends: a scorching 100° on June 24, 2025 and a bone-cracking -25° on Valentine's Day 2016 define the extremes. The wettest single day on record — 12.77 inches on August 19, 1955 — hints at the area's vulnerability to late-summer deluges, while 26 inches of snow on February 9, 2013 remains the benchmark storm.
Summer is the sweet spot, with highs peaking around 85° the week of July 16–22, while mid-January bottoms out near 34°. If you're avoiding rain, steer clear of mid-August, the wettest stretch of the year averaging over an inch a week. Spring and fall offer a comfortable middle ground, with April and October both averaging highs in the upper 50s to low 60s.