BURLINGTON, Vt. – Burlington logged a rare “Weathergami” this week, with temperatures that barely budged all day. The National Weather Service confirmed the city reached a high of 45°F and a low of 43°F — a combination never before observed in 133 years of local records. The narrow 2-degree difference made Thursday one of the most stable temperature days ever documented in Vermont’s Queen City.
According to the National Weather Service Burlington office, the event was driven by a thick blanket of low clouds and stagnant air over Lake Champlain. The cloud cover trapped warmth overnight while blocking daytime heating, keeping temperatures nearly identical for more than 24 hours. Meteorologists call this an “isothermal” setup — a situation where minimal air movement prevents typical warming and cooling cycles.
The rare temperature pairing underscores how persistent fall cloud decks can influence local conditions, especially near major bodies of water. NWS Burlington noted that similar patterns can also occur during early winter warm fronts or lake-effect setups when winds calm and skies stay overcast.
Residents along I-89 and in Chittenden County likely noticed the steady chill throughout the day. The stable temperatures offered minimal frost risk but signaled a continued stretch of damp, cloudy weather heading into early next week. Officials urge Vermonters to plan for slower road drying times, limited sunshine, and possible morning fog in valley areas.
