Historical weather data, all-time temperature records, and monthly climate averages for Hamden, CT. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4 in Hamden splits the difference between winter and spring — historically, you're looking at a high near 53° and a low around 34°, with a 40% chance of rain. The date has seen some wild swings over 70 years of records, from a balmy 69° in 1950 to a brutal 11° low in 1954.
Hamden's weather has real range. The mercury has climbed as high as 104° (July 4, 1949) and crashed to -24° (February 16, 1943) — a swing of 128 degrees between extremes. A single storm dropped 19.4 inches of snow on February 7, 1978, and another dumped 6.7 inches of rain on September 12, 1960.
Hamden peaks in mid-July, when average highs hit 85°, and bottoms out in early January around 36°. Spring arrives gradually — highs don't clear 70° until May — and early April is actually the wettest stretch of the year. If you're planning a visit, June through September offers the warmest and most reliably pleasant conditions.