Historical weather data, all-time temperature records, and monthly climate averages for Wilton, CT. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4 in Wilton sits squarely in meteorological no-man's-land — expect a high around 56° and a low near 36°, but the range of possibilities is wide. This date has seen everything from a balmy 73° in 2010 to a brutal 21° low back in 1962. There's a coin-flip chance of rain (52%), though snow is nearly off the table at just 2%.
Wilton's weather has real teeth at the extremes — the thermometer has swung from a scorching 104° on August 9, 2001 all the way down to -18° on January 22, 1961, a range of 122 degrees. On the wet side, a single day in June 1972 dropped 6.12 inches of rain, and a February 2003 storm buried the town under 18 inches of snow.
Summer is the main event here, with highs peaking around 85-86° in mid-July and the warmest stretch running through late July and August. Winter bottoms out in early January with average highs barely reaching 37°. If you're trying to dodge rain, avoid late May through early June — that's Wilton's wettest window, averaging over an inch of precipitation per week.