Climate and monthly weather forecast
Westport, MA

Located in Massachusetts, USA, Westport falls under the Cfa climate category in accordance with the Köppen Climate Classification - indicating a humid subtropical climate with no dry season. Throughout the year, Westport experiences considerable variations in both temperature and rainfall. The average monthly high temperature ranges from 37.6°F (3.1°C) to 80.1°F (26.7°C), while the low averages between 23.5°F (-4.7°C) and 64.8°F (18.2°C). This signifies a substantial change of about 46.6°F (8.1°C) in temperature throughout the year.

Throughout the year, Westport also experiences varied rainfall. The range goes from 2.9" (74mm) in July reaching up to 4.3" (109mm) in August. As per the data, August observes the maximum rainfall, which provides an interesting climate pattern where the wettest month appears during the warmest period in Westport. On the other hand, the rainfall remains pretty constant from November to January at around 4.1" (104mm).

The length of the day also varies significantly, starting from 9.2 hours in December and expanding to 15.1 hours in June. This approximately six-hour change in daylight duration throughout the year corresponds well with the noticeable changes in temperature as well as rainfall patterns.

Taking into account the prevailing temperature, rainfall and daylight duration, the period from May to August would be considered as the best time to visit Westport. During this time, the average high temperature ranges from 65.5°F (18.6°C) to 80.1°F (26.7°C) and the rainfall is relatively lower than the other months. Also, daylight duration extends to as much as 15.1 hours in June, giving visitors ample time to explore the outdoors.

Based on the same considerations, the period from December to February might be seen as less desirable to visit Westport. During these months, the average low temperature can fall to as low as 23.5°F (-4.7°C) and the daylight duration falls short, comparing to the rest of the year, at around 9.6 hours in December and January.

Spring in Westport, which spans from March to May, witnesses a remarkable rise in both temperature and daylight duration. The average high temperature starts from a milder 45.1°F (7.3°C) in March and gradually increases to 65.5°F (18.6°C) in May. At the same time, daylight increases from 12 hours to 14.5 hours, making the days noticeably longer.

The summer season in Westport, stretches from June to August, is characterized by warmer weather with temperatures peaking at 80.1°F (26.7°C) in July. This period also sees the longest days, reaching 15.1 hours in June. Despite being the warmest period, Westport receives an average rainfall of approximately 3.2" (81mm) in June, increasing to 4.3" (109mm) in August.

During Autumn, from September to November, Westport experiences a gradual drop in temperature, from a high of 72.1°F (22.3°C) in September to a colder 51.8°F (11°C) in November. The daylight duration also decreases from 12.5 hours in September to 9.9 hours in November, marking the approach of winter. Rainfall remains fairly constant at around 3.3" (84mm) to 4.1" (104mm).

Winter in Westport, encompassing December to February, brings the coldest temperatures, with lows falling to 23.5°F (-4.7°C) in January and February. Daylight hours reach their minimum at 9.2 hours in December, making the days shorter. Despite the colder conditions, rainfall does not decrease drastically, maintaining an average of around 4" (102mm) per month.

January sees the chill of winter in Westport, Massachusetts. With temperatures dipping to a low of 23.5°F (-4.7°C), it marks the coldest month of the year. The region experiences chilly winds that compel residents to stay indoors. Weather in January »

February is another month of cold weather in Westport, even as temperatures experience a minor increase with highs touching 37.8°F (3.2°C). The wintry feel persists, although the daylight slowly starts to stretch hinting at the upcoming spring. Weather in February »

March brings a transition in the weather as Westport steps into spring from winter. Brighter days become noticeable with a significant increase in daylight hours. A remarkable change in temperatures, especially with lows rising to 31.1°F (-0.5°C), transforms the weather landscape of the city. Weather in March »

April marks further ascension into the realms of spring in Westport, with temperatures showing continued improvement. With warmer breezes replacing the cold winds of winter, the city blooms in the refreshing ambiance. At 54.7°F (12.6°C), high temperatures become an inviting aspect for outdoor enthusiasts. Weather in April »

As Westport moves further into May, the weather shifts toward warmer tendencies. The firm grip of spring becomes even more noticeable with increasing greenery. High temperatures striding at 65.5°F (18.6°C) characterize the month. The shift in weather encourages various festivals and outdoor events. Weather in May »

Enter Westport in June, and summer makes its presence felt. The weather transitions from mildly warm to outright sunny. With increased daylight hours, the city vibrates with summer festivities. High temperatures soaring to 74.5°F (23.6°C) testify to the arrival of summer. Weather in June »

July brings the zenith of summer in Westport. The month experiences the highest temperature levels, peaking at 80.1°F (26.7°C). Days are long, bright, and predominantly warm. Many residents flock to beaches and public parks to make the most of the sunny weather. Weather in July »

August holds onto summer in Westport, yet with a hint of upcoming change. Despite temperatures reaching high levels of 78.6°F (25.9°C), the evenings indicate a gradual cooling trend. As the month progresses, daylight hours begin to lessen. Weather in August »

In Westport, September is synonymous with the onset of fall. A noticeable reduction in daylight hours confirms the departure of summer. Temperatures continue to drop, averaging highs of 72.1°F (22.3°C), signaling prominent weather changes. Weather in September »

As October unfurls in Westport, the changing hues of fall become more visible. Temperatures continue their downward trend providing relief from the summer's heat. The days grow shorter still, adding to the allure of the season. Crisp weather and breathtaking autumn landscapes become the city's staple during these months. Weather in October »

November ushers in the chill in Westport as the city prepares to bid farewell to fall. The temperature gradients tilt towards the cooler side, with lows dropping to 38.1°F (3.4°C). Shorter daylight hours and distinct fall colors lend an arresting aura to the city. Weather in November »

December in Westport is an introduction to the cold season. There's a significant drop in high temperatures, barely reaching 41.2°F (5.1°C). Winter characteristics become more prominent as December carries on. The days shorten, and the nights lengthen, typical of a winter pattern. Weather in December »