Climate of Londonderry, New Hampshire

Londonderry, New Hampshire, is a town located in the southern part of the state, in Rockingham County. Situated in the New England region of the United States, Londonderry experiences a humid continental climate with four distinct seasons, marked by varying temperatures and precipitation patterns throughout the year. The town’s geographical location, topography, and proximity to the Atlantic Ocean influence its climate and weather conditions.

Geographical Location: Londonderry is situated in southern New Hampshire, with coordinates approximately around 42.8651° N latitude and 71.3739° W longitude. It is part of the greater Manchester metropolitan area and is located about 10 miles south of the city of Manchester. The town is characterized by a mix of suburban and rural landscapes, with a variety of natural features, including lakes, streams, and wooded areas. Check cities in New Hampshire by population.

Climate Classification: Londonderry falls under the classification of a humid continental climate, or “Köppen climate classification Dfa.” This type of climate is characterized by four distinct seasons, including warm to hot summers, cold winters, and moderate precipitation throughout the year. The town’s inland location away from large bodies of water contributes to more pronounced temperature variations.

Seasonal Overview:

  1. Summer (June-August): Summers in Londonderry are warm to hot, with average high temperatures ranging from the mid-70s to the low 80s Fahrenheit. Occasionally, temperatures can reach into the 90s during heatwaves. The region experiences longer daylight hours, providing ample time for outdoor activities. Summer is the wettest season, with occasional thunderstorms bringing heavy rainfall.
  2. Autumn (September-November): Autumn brings a gradual cooling of temperatures, with average highs starting in the 60s and decreasing to the 40s and 50s by November. Fall foliage is a highlight of the season, as deciduous trees transform into vibrant shades of red, orange, and yellow. The air becomes crisp, and precipitation levels are moderate.
  3. Winter (December-February): Winters in Londonderry are cold, with average high temperatures ranging from the 20s to the 30s Fahrenheit. Nighttime temperatures often drop below freezing, and the region experiences snowfall. Winter storms can bring significant snow accumulation, and residents may engage in winter activities such as skiing and snowboarding. Winter is the driest season in terms of liquid precipitation.
  4. Spring (March-May): Spring is a transitional season characterized by gradually warming temperatures. Average highs start in the 40s and progress to the 50s and 60s by May. Spring is a time of renewal, with the melting of snow, budding trees, and blooming flowers. Precipitation levels increase, and the region experiences a mix of rain showers and occasional thunderstorms.

Climate Influences: The climate of Londonderry is influenced by its inland location, topography, and proximity to the Atlantic Ocean. While the town is not directly situated on the coast, the ocean’s influence extends inland, impacting temperature moderation and precipitation patterns.

Atlantic Ocean Influence: Londonderry is influenced by the proximity of the Atlantic Ocean to the east. The ocean’s moderating effect helps to regulate temperatures, preventing extreme temperature fluctuations. However, since Londonderry is not directly on the coast, it still experiences more significant temperature variations compared to coastal areas.

Topographical Impact: The topography of Londonderry is characterized by a mix of rolling hills, wooded areas, and bodies of water. This diverse landscape can influence local weather patterns, creating microclimates and contributing to variations in temperature and precipitation across different parts of the town.

Piscataquog River Influence: The Piscataquog River, which flows through the northern part of Londonderry, is a notable water feature that can influence local climate conditions. Bodies of water, including rivers, can contribute to variations in humidity and temperature, especially in proximity to water sources.

Extreme Weather Events: Londonderry is susceptible to a range of extreme weather events common in the New England region. Winter storms, including snowfall and ice, can impact the town, affecting transportation and daily activities. Summer thunderstorms can bring heavy rainfall, lightning, and occasional strong winds.

Conclusion: Londonderry, New Hampshire, experiences a humid continental climate with distinct seasons, each contributing to the town’s overall climate profile. The warm summers, colorful autumns, cold winters, and blossoming springs provide a variety of weather experiences for residents and visitors. While Londonderry is not directly influenced by large bodies of water like the Atlantic Ocean, its inland location, topography, and proximity to water sources contribute to the unique climatic conditions of the region. The town’s climate not only shapes the natural environment but also influences the outdoor activities and lifestyle choices of its community throughout the changing seasons.