Historical weather data, all-time temperature records, and monthly climate averages for Shelton, CT. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Derby runs mild but unpredictable — the average high of 54° masks a 48-degree swing in the historical record, from a bitter 22° in 1995 to a shirt-sleeve 70° in 1988. There's about a 1-in-3 chance of rain today, though snow is essentially off the table at this point in spring.
Derby has seen the full extremes of a southern New England climate, from a scorching 103° in July 1957 to a brutal -7° in January 1984 — a 110-degree range across its recorded history. The wettest single day dumped 6.18 inches in June 1972, while the snowiest dropped 18.5 inches in February 2013's historic nor'easter.
Summer is the sweet spot here, with average highs peaking around 84° in late July — ideal if you want warmth without the oppressive heat that hits further south. Winters are genuinely cold, with January highs averaging just 36-37°, so pack accordingly if you're visiting between December and February. Rain is spread fairly evenly year-round, with August slightly wetter than the rest at just over an inch per week.