Historical weather data, all-time temperature records, and monthly climate averages for Sewell, NJ. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Sewell splits the difference between winter and spring — the average high of 60° feels promising, but that 25° low recorded back in 1943 is a reminder that frost isn't off the table yet. There's nearly a coin-flip chance (46%) of rain today historically, so keep an umbrella handy.
Sewell's weather has some serious range — from a brutal -7° in January 1982 to a scorching 104° in July 1966, this South Jersey town doesn't do things halfway. The wettest single day on record dumped over 8 inches of rain on July 28, 2013, and a single January storm in 1996 buried the area under 27.6 inches of snow.
Summer is the main event in Sewell, with mid-July highs averaging 88° and the year's wettest stretch falling right in that same window — pack light and bring rain gear. If you're cold-averse, avoid mid-January when highs barely crack 39°. Spring and fall offer the sweet spot, with April and October highs in the comfortable mid-60s.