Climate and monthly weather forecast
Westbrook, CT

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The climate of Westbrook

Westbrook is identified by Köppen climate classification as a Cfb climate zone, commonly known as Marine West Coast, Warm Summer climate. Nestled along the Connecticut coastline, it exhibits a moderate and somewhat damp climate with warm but not hot summers and cool, quite wet winters. The temperatures oscillate with the changing seasons, with highs extending from 35.2°F (1.8°C) in January up to 79.7°F (26.5°C) during the summer months of July and lows ranging from 25.5°F (-3.6°C) in January to a mild 66.6°F (19.2°C) in July.

Persistent throughout the year, the relative humidity hovers primarily between 73% and 78%. Rainfall sees a fairly even distribution across the year with monthly averages peaking at 3.66" (93mm) in December and hitting a low of 1.93" (49mm) in September. Snowfall, predominantly a winter occurrence, reaches a maximum of 2.76" (70mm) in March while completely tapering off between June and September.

Noticeably contrasting, the daylight hours and sunshine intensity change throughout the year. The longest days occur in June with about 15.1 hours of daylight, while the shortest days in December provide approximately 9.2 hours of light. Correspondingly, June also sees the highest UV index of 6 while the index drops to a low of 2 in the winter months.

The best time to visit Westbrook

For individuals seeking warmth and plentiful sunlight, June to August make the ideal months to visit Westbrook. With daily maximum temperatures rising to 79.7°F (26.5°C) in July and minimum nighttime temperatures comfortably resting at about 66.6°F (19.2°C), these summer months provide a charming warm climate. During this period, daylight extends to approximately 15.1 hours per day in June while the UV index hits a peak of 6, offering abundant sunshine.

The sea temperature also becomes agreeable for watersports during these months, with a peak at 72.1°F (22.3°C) in August. Even though these months witness some rainfall with an average of 16.5 rainy days in June, the accompanying warmth and sunshine generally compensate for the wet spells.

The worst time to visit Westbrook

For tourists seeking to avoid Westbrook's coldest and wettest conditions, the months between December and March are best skipped. In these peak winter months, the maximum temperature plummets to 35.2°F (1.8°C) and the minimum-temperature drops to 25.5°F (-3.6°C) in January. Rainfall reaches its height in December at 3.66" (93mm) and the region encounters snowfall, peaking at 2.76" (70mm) in March.

The daylight hours shorten drastically to just over 9 hours per day in December and an UV index of 2 reduces the intensity of sunlight. Wind speeds also increase, reaching maximum averages of 11.7mph (18.8km/h) in January, enhancing the chill factor.

Spring weather in Westbrook

Westbrook begins to thaw from the colder winter months in Spring. With temperatures ranging from 32.5°F (0.3°C) to 54.3°F (12.4°C) between March and May, the weather gradually warms up. Sea temperatures also rise from 39.8°F (4.3°C) in March to 51.9°F (11.1°C) by May, although they remain too cold for swimming. Despite having the highest number of daylight hours in May at 14.5, it is among the wetter months with rainfall measuring at 2.76" (70mm) and 16.8 rainy days.

Summer weather in Westbrook

Summer in Westbrook runs from June to August and is characterized by long sunny days with 15.1 hours of daylight in June and pleasant warmth. Daily highs rise from 73°F (22.8°C) in June to 79.7°F (26.5°C) in July while lows range from 58.8°F (14.9°C) in June to 66.6°F (19.2°C) in July. Temperatures often remain comfortable even at night. Summer also sees a drop in rainfall with averages falling to 2.91" (74mm) in June and August, although there is slight increase in July, reaching 3.11" (79mm).

Autumn weather in Westbrook

The months between September and November herald in Westbrook's Autumn. During this period, days start to shorten from 12.5 daylight hours in September to just under 10 hours by November. Though still relatively comfortable, temperatures start to cool down with daily highs falling from 72.3°F (22.4°C) in September to 50.7°F (10.4°C) in November and lows dropping from 59.5°F (15.3°C) to 39.9°F (4.4°C). Autumn months also see increased precipitation with rainfall reaching its height in November at 3.07" (78mm).

Winter weather in Westbrook

With December starts Westbrook's winter, characterised by colder temperatures that persist through February. Days become noticeably shorter, with December having the shortest daylight hours of the year at 9.2. December also witnesses the highest rainfall of the year, measuring at 3.66" (93mm). Snow is most common in these months, reaching a high of 2.72" (69mm) in February. Despite the cold and the high humidity ranging from 75% in December to 77% in February, the sea temperature remains slightly warmer, hovering between 48.9°F (9.4°C) and 41.9°F (5.5°C).

Weather in January

The freshness of a new year in Westbrook, Connecticut breathes chilly air. A white January, with a high average snowfall of 2.17" (55mm) brings a festive feeling to the start of the year. Layer up and enjoy the local winter sports or indoor activities while taking care of any outdoor transportation or chores. Weather in January »

Weather in February

Although February has shorter days, it is slightly warmer than the preceding offspring month of the year. The month is still dominated by winter's grip, peppering Westbrook with its second highest snowfall of the year, reading 2.72" (69mm). Weather in February »

Weather in March

Weather conditions in March signal the transition from winter to spring in Westbrook. A rising temperature from freezing to a cool 43.7°F (6.5°C), sees a shift from snow to rain with 2.8" (71mm) of precipitation averaged during this month. Weather in March »

Weather in April

April signifies the full arrival of spring in Westbrook, Connecticut. Nature starts to awaken from its slumber, and the city’s picturesque landscape comes alive under a slightly warmer sun. The rise in temperature, peaking at 54.3°F (12.4°C), combines with the longer daylight hours of 13.4, hinting at the onset of more temperate weather. Weather in April »

Weather in May

May heralds the arrival of consistent warmth in Westbrook. The increase in temperature, reaching a high of 64.9°F (18.3°C), is noticeable, as the last vestiges of winter fall away. The choice of outdoor activities becomes broader, taking full advantage of the clear skies. Weather in May »

Weather in June

June ushers in the delightful and much-awaited summer vibe to Westbrook, Connecticut. The days are at their longest, with daylight shooting up to 15.1 hours. Pleasant summer temperatures, averaging at around 73°F (22.8°C), bring a relaxed atmosphere perfect for outdoor pursuits or backyard barbecues. Weather in June »

Weather in July

In July, the heat increases to its peak in Westbrook with a high temperature of 79.7°F (26.5°C). The summer sun, combined with consistent breezes flowing through creates a distinct Kentucky bluegrass climate. Despite the heat, rainfall levels remain at 3.11" (79mm), allowing for a well-hydrated and blossoming environment. Weather in July »

Weather in August

As Westbrook moves into August, the tantrums of the peak summer heat subside slightly. Although the retreat in temperature is mild, it makes summer more manageable and enjoyable. Preferred clothings are still light summer attires as the sea temperature rises to a warm and inviting 72.1°F (22.3°C). Weather in August »

Weather in September

September marks the transition from the scorching summer heat to the mild and inviting onset of fall in Westbrook. The month promises cooler temperatures, settling at a comfortable high of 72.3°F (22.4°C). It's a more manageable warmth that invites you to experience and explore the city. Weather in September »

Weather in October

Come October, Westbrook, Connecticut, begins to don its autumn colors in earnest. As the month progresses, the weather continues its cooling trend, offering a more temperate climate. However, this change in seasons results in a slight increase in rainfall from 1.93" (49mm) in September to 3.46" (88mm). Weather in October »

Weather in November

By November, Westbrook starts to feel the prominent chill of the upcoming winter season. The city, however, continues to bask in the vibrant colors of fall. Rainfall decreases slightly to 3.07" (78mm) while the wind speed increases to 10.1mph (16.3km/h), presenting a brisk and invigorating atmosphere. Weather in November »

Weather in December

December marks the arrival of winter in full swing in Westbrook, Connecticut, with temperatures averaging a low of 32.4°F (0.2°C). The drop in temperature announces the return of snow with 1.34" (34mm) recorded on average. Despite the cold conditions, the spirit of the holiday season maintains a warm atmosphere throughout the city. Weather in December »
Updated: Jun 4, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What part of the year is the coldest in Westbrook?

January is the coldest month of the year, registering average temperatures as high as 35.2°F (1.8°C) and as low as 25.5°F (-3.6°C).

How much does it rain?

Throughout the year, there are 166.2 rainfall days, and 34.8" (884mm) of precipitation is accumulated.

When does it snow?

January through May, November and December are months with snowfall.

How many days does it snow?

In Westbrook, during the entire year, snow falls for 24.2 days and aggregates up to 9.53" (242mm) of snow.

When is the lowest UV index?

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.

When is the ocean coldest?

February is the month with the coldest seawater, with an average ocean temperature of 38.8°F (3.8°C).

What are the months with the least sunshine?

February and December, with an average of 4.8h of sunshine, are months with the least sunshine.

When does it snow the most?

The month with the most snowfall is March, when snow falls for 4.7 days and typically aggregates up to 2.76" (70mm) of snow.

When is Daylight Saving Time (DST)?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.

What is the least humid month?

With an average relative humidity of 73%, April is the least humid month.

What is the most humid month?

The months with the highest humidity in Westbrook are May through July, with an average relative humidity of 78%.

When it does not snow?

In Westbrook, snow does not fall in June through October.

When are the longest days?

With an average of 15h and 6min of daylight, June has the longest days of the year.

What is the month with the highest UV index?

The months with the highest UV index are June through August, with an average maximum UV index of 6.

What part of the year is the hottest?

July brings the highest temperatures in Westbrook, with an average high of 79.7°F (26.5°C) and an average low of 66.6°F (19.2°C).

What month is the ocean warmest?

August is the month with the warmest seawater, with an average ocean temperature of 72.1°F (22.3°C).

What month has the most sunshine?

With an average of 10.6h of sunshine, August has the most sunshine of the year.

What is the driest month?

The month with the least rainfall is September, when the rain falls for 13 days and typically collects 1.93" (49mm) of precipitation.

What is the wettest month?

The month with the most rainfall is December, when the rain falls for 13 days and typically aggregates up to 3.66" (93mm) of precipitation.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 18min of daylight.
Today
Tomorrow
Long-term
YearJFMAMJJASOND

Average temperature
Westbrook, CT

Average temperature - Westbrook, CT

The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (35.2°F).

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (25.5°F).

Average pressure
Westbrook, CT

Average pressure - Westbrook, CT

The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed
Westbrook, CT

Average wind speed - Westbrook, CT

The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).

Average humidity
Westbrook, CT

Average humidity - Westbrook, CT

The months with the highest relative humidity are May, June and July (78%).
The month with the lowest relative humidity is April (73%).

Average rainfall
Westbrook, CT

Average rainfall - Westbrook, CT

The wettest month (with the highest rainfall) is December (3.66").
The driest month (with the least rainfall) is September (1.93").

Average rainfall days
Westbrook, CT

Average rainfall days - Westbrook, CT

The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is January (9 days).

Average snowfall
Westbrook, CT

Average snowfall - Westbrook, CT

The month with the highest snowfall is March (2.76").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days
Westbrook, CT

Average snowfall days - Westbrook, CT

The month with the highest number of snowfall days is February (7 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature
Westbrook, CT

Average sea temperature - Westbrook, CT

The best month for swimming (with the highest average sea temperature) is August (72.1°F).
The coldest month (with the lowest average sea temperature) is February (38.8°F).

Average daylight / Average sunshine
Westbrook, CT

Average daylight / Average sunshine - Westbrook, CT

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).

Average sunshine days
Westbrook, CT

Average sunshine days - Westbrook, CT

The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is July (11.7 days).

Average UV index
Westbrook, CT

Average UV index - Westbrook, CT

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover
Westbrook, CT

Average cloud cover - Westbrook, CT

The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility
Westbrook, CT

Average visibility - Westbrook, CT

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Westbrook, Connecticut, USA

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