Grand Isle County, Vermont Weather by Month

By | December 2, 2023

Grand Isle County, located in northwestern Vermont, experiences a humid continental climate with four distinct seasons and significant temperature variations.

January – March (Winter):

  • Winters in Grand Isle County are cold, with January typically being the coldest month.
  • Daytime temperatures often range from the teens to 20s Fahrenheit, and nighttime temperatures can drop well below zero.┬áSee for climate and weather in South Burlington, Vermont.
  • Snow is common during these months, and winter storms may bring significant snowfall.
  • Residents may experience cold and brisk conditions, and winter activities like skiing and snowmobiling are popular.

April – June (Spring):

  • Spring brings a gradual warming of temperatures, and the landscape begins to thaw.
  • Daytime highs generally range from the 30s in April to the 60s and 70s in May and June.
  • Spring is a transition period, and while cooler days are possible in April, the weather becomes more comfortable, and outdoor activities increase.
  • The region experiences the melting of snow, revealing the emergence of spring vegetation.

July – September (Summer):

  • Summer in Grand Isle County is warm, with daytime temperatures often reaching into the 70s and 80s Fahrenheit.
  • July and August are typically the warmest months, with occasional days surpassing 90 degrees Fahrenheit.
  • Summer is the wettest season, with increased chances of rain and thunderstorms.
  • Residents and visitors take advantage of the warm weather with outdoor activities, including boating, swimming, and hiking.

October – December (Fall):

  • Fall is characterized by a gradual cooling of temperatures and the changing colors of the leaves.
  • Daytime highs range from the 60s in October to the 20s and 30s in December.
  • The fall foliage attracts tourists and locals alike.
  • Fall may bring occasional rain showers, and the region experiences milder and more comfortable temperatures compared to the peak of summer.

Additional Considerations:

  • Grand Isle County’s climate is influenced by its location in the Lake Champlain Valley and its proximity to the Adirondack Mountains.
  • The county is known for its scenic landscapes, including Lake Champlain and the Green Mountains.
  • Agriculture is an essential part of the county’s economy, and the growing season extends from late spring to early fall.
  • Grand Isle County occasionally experiences lake-effect snowfall, especially in the winter months when cold air passes over the relatively warmer waters of Lake Champlain.

For the most accurate and up-to-date weather information, it’s recommended to consult local weather forecasts, meteorological sources, or the National Weather Service. Weather patterns can vary from year to year, and extreme events may impact the typical seasonal weather.

Grand Isle County, Vermont