Historical weather data, all-time temperature records, and monthly climate averages for Guilford, CT. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Guilford runs cool, with average highs of just 53° and lows dipping to 36° overnight. The date has swung dramatically over 54 years of records — from a balmy 67° in 2010 to a bitter 23° low in 2016. There's a 1-in-3 chance of rain, but snow is off the table.
Guilford has seen the full range of New England extremes, from a scorching 101° on July 22, 2011 to a brutal -8° on January 19, 1948 — a 109-degree spread. Single-day rainfall peaked at 5.24 inches in June 1972, and a February 1958 storm buried the area under 16.1 inches of snow.
Summer is the sweet spot, with highs peaking around 82-83° in mid-to-late July — the warmest stretch of the year. January is the coldest month, with average highs barely clearing 36°. December is surprisingly the wettest time of year, averaging over an inch of precipitation in a single week.