Wilmington, North Carolina – An unusually large temperature swing was recorded in Wilmington on Tuesday, with conditions changing dramatically along major travel corridors including Interstate 40 and U.S. 17.
According to the National Weather Service in Wilmington, temperatures at Wilmington International Airport (KILM) dropped to 28 degrees early Tuesday morning before rapidly warming to a high of 74 degrees by mid-afternoon. The 46-degree diurnal temperature range ranks as the second-largest on record at the airport.
Meteorologists say the sharp temperature increase was driven by clear skies, dry air, and strengthening sunshine following the early-morning cold. The only larger temperature swing on record at KILM occurred on January 20, 1985, when temperatures ranged 47 degrees in a single day.
The rapid warmup was especially noticeable for drivers and outdoor workers traveling along I-40, US-17, US-74, and I-140, where early-morning frost conditions quickly gave way to springlike afternoon warmth. Dew points remained low for much of the day, helping temperatures climb efficiently despite the cool start.
Large temperature swings like this are uncommon but not unheard of in coastal North Carolina, particularly during late winter when strong high pressure systems move offshore and allow warmer air to surge inland.
While no hazardous weather was associated with the temperature change, officials note that sudden shifts can still impact early commuters, students, and outdoor workers, especially during morning hours when cold conditions may be underestimated later in the day.
Forecasters expect more seasonable conditions to follow, with temperatures moderating and smaller daily swings expected later this week.
Residents are encouraged to remain mindful of rapid temperature changes during transitional seasons and to dress in layers when starting the day early.
