Historical weather data, all-time temperature records, and monthly climate averages for Phillipsburg, NJ. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Phillipsburg runs mild but unpredictable — expect a high near 58° and a low around 35°, with a 41% chance of rain. The date has swung wildly over 58 years of records, from a bitter 17° in 2005 to a shirt-sleeve 77° as recently as 2023.
Phillipsburg knows weather extremes well. The thermometer has hit 103° in August 2001 and plunged to -13° in January 1994 — a 116-degree spread that reflects the full force of the mid-Atlantic continental climate. A single July day in 1945 dropped 8.54 inches of rain, and Christmas 1966 buried the town under 17 inches of snow.
Peak summer arrives mid-to-late July, when average highs reach 87° and late July is also the wettest stretch of the year at 1.37 inches per week. Winters are cold but not brutal — January highs hover around 36-38°, so if you're visiting for mild weather, aim for June through September.