Historical weather data, all-time temperature records, and monthly climate averages for Old Saybrook, CT. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Old Saybrook sits right in that in-between stretch of early spring, with a typical high of just 52° and a low dipping to 36°. The date has seen real range over 70 years of records — from a balmy 70° in 2010 to a brutal 24° low back in 1962. There's a coin-flip chance of rain today, though snow is nearly off the table at just 2%.
Old Saybrook has seen it all over 76 years of records, from a scorching 101° in July 1991 to a bone-chilling -14° in January 1961 — a swing of 115 degrees. The wettest single day on record dumped 7.43 inches during a September 1961 storm, and a January 2015 nor'easter buried the town under 24 inches of snow.
Old Saybrook peaks in mid-to-late July, when average highs reach 81-82°, making summer the clear choice for warm-weather visits. Winter bottoms out the third week of January with average highs of just 36°. Rainfall is fairly consistent year-round, but late summer — especially early August — is the wettest stretch, averaging over an inch of precipitation per week.