Climate and monthly weather forecast
Old Saybrook, CT

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The climate of Old Saybrook

Old Saybrook, Connecticut, fits within the Cfb category of the Köppen climate classification system. In this marine west coast environment with warm summer temperature, the town experiences a range of weather conditions throughout the year. Moving from January to December, a gradual transition of climatological conditions occurs, reflecting its geographical position on the edge of North America's northeast boundary.

Daily temperatures shift from an average high of 35.2°F (1.8°C) in January up to a peak of 79.7°F (26.5°C) in July, before dipping back down to 41.9°F (5.5°C) in December. These fluctuations bring a mixed array of weather sets to Old Saybrook's residents. The temperature of the sea harmonizes with these land conditions, dropping to a chilly 38.8°F (3.8°C) in February and peaking at a pleasantly warm 72.1°F (22.3°C) in August.

A typical year in Old Saybrook sees a fairly constant level of humidity at around 74% to 78% but substantial fluctuations in the amount of rainfall and snowfall within a month. Enjoying a considerable measure of rainfall year-round, Old Saybrook sees the least precipitation in September with 1.93" (49mm), while December receives the most at 3.66" (93mm). From January to March, and again in November and December, the town also experiences snowfall. January brings the highest snowfall at 2.17" (55mm) and November the least at 0.2" (5mm).

Suffused with plenty of natural sunlight, daylight durations in Old Saybrook fluctuate from 9.6 hours in January to a maximum of 15.1 hours in June, before decreasing to 9.2 hours in December. The town also sees variable conditions in terms of cloud cover, with percentages ranging from 29% in August to 48% in February and December, respectively.

The best time to visit Old Saybrook

For visitors seeking to enjoy warm weather and ample daylight, the peak summer months from June to August serve as the prime time to explore Old Saybrook. During this period, average high temperatures hover between 73°F (22.8°C) and 79.7°F (26.5°C) and sea temperatures range from 69.5°F (20.8°C) to 72.1°F (22.3°C), providing the perfect conditions for beach visits and water activities. Moreover, July enjoys the longest daylight hours reaching 14.8 hours, along with maximum sunshine at 10.5 hours. The consistent weather and lower rainfall in summer season make this the ideal time for outdoor adventures.

The worst time to visit Old Saybrook

Given the colder temperatures and increased snowfall, the winter season from December to February is comparatively less favorable for travelers. With temperatures dropping to as low as 25.5°F (-3.6°C) in January, and sea temperatures languishing around 38.8°F (3.8°C) to 41.9°F (5.5°C), these months may not offer the best conditions for outdoor exploration. Additionally, December records the maximum rainfall with 3.66" (93mm) and considerable snowfall, rendering it undesirable to those adverse to colder, wetter climates.

Spring weather in Old Saybrook

As winter transitions into spring, Old Saybrook experiences a gradual increase in temperatures with averages ranging from 43.7°F (6.5°C) in March to 64.9°F (18.3°C) in May. The area benefits from extended daylight leading up to 14.5 hours in May and a relative reduction in rainfall from the winter months to between 2.76" (70mm) and 3.23" (82mm). Spring also marks the end of the snowy season, making it a pleasant time to enjoy the blossoming local flora.

Summer weather in Old Saybrook

By contrast to spring, summer in Old Saybrook heralds in warm temperatures with the highest average soaring to 79.7°F (26.5°C) in July. It also notes an increased sea temperature, reaching its peak at 72.1°F (22.3°C) in August, inviting visitors to enjoy the coastline. The amount of rainfall, however, escalates to between 2.91" (74mm) and 3.11" (79mm) while the amount of daily sunshine ranges from 8.6 hours to a maximum of 10.5 hours in July.

Autumn weather in Old Saybrook

The autumn months in Old Saybrook showcase a gradual cooling trend with temperatures dropping from the peak summer highs to between 72.3°F (22.4°C) and 50.7°F (10.4°C) from September to November. Rainfall varies during this period, with the least precipitation occurring in September at 1.93" (49mm) and the most in November at 3.07" (78mm). Autumn offers a balance between the warm summer and the impending cooler winter months.

Winter weather in Old Saybrook

Winter brings a touch of frost to Old Saybrook as average high temperatures descend to between 41.9°F (5.5°C) and 35.2°F (1.8°C) from December to February. Daily sunshine hours are at their lowest with 4.8 hours in December, and the sea temperature cools to its lowest at 38.8°F (3.8°C) in February. Snowfall commonly occurs, offering a scenic, winter wonderland for those who enjoy this cooler season.

Weather in January

January sees weather conditions typical of winter in Old Saybrook, Connecticut. Cold temperatures prevail throughout the month, deterring the typical outdoor activities common to the region. High humidity accentuates the chill in the air, with light precipitation dusting the neighborhood in a blanket of frost. Weather in January »

Weather in February

As February takes over, weather conditions remain largely consistent with January; cold, often frosty, with a possibility of light snow. The days are still short and gloomy, but the daylight hours start to expand slightly. Winds maintain a cold gust, keeping the environment brisk. Weather in February »

Weather in March

Old Saybrook's climate in March offers a transition. A warming trend emerges as the region braces for spring. The land starts to shake off its winter slumber with increasing daylight and sunshine hours. Snowfall reduces significantly, with more rain providing nourishment for the upcoming spring blooms. Weather in March »

Weather in April

April ushers in a definitive shift in the weather. Temperatures rise significantly, the landscape transforms with blooming flowers, and residents enjoy extended daylight hours. Rainfall proves frequent as April lives up to the proverb, "April showers bring May flowers." The winds in April soften, with gusts decreasing from March's 16.5mph (26.6km/h) to a milder 15.6mph (25.1km/h). Weather in April »

Weather in May

The weather in May in Old Saybrook, Connecticut, is diverse and changeable. May is an excellent month for outdoor activities with long daylight hours and an increasing amount of sunshine. A significant reduction in snowfall and slightly moderate temperature variation is indicative of the arrival of warmer months. Weather in May »

Weather in June

June initiates summer in Old Saybrook with warming temperatures, protracted sunshine, and substantial daylight hours. The region's atmosphere becomes vibrant under the bright sun, inviting residents and tourists to bask in the outdoors. Weather in June »

Weather in July

In July, Old Saybrook's weather exhibits quintessential summer conditions. Temperatures are generally high, peaking for the year at 79.7°F (26.5°C). Long daylight hours and equally long sunshine hours mark July as the sunniest month in Old Saybrook. Weather in July »

Weather in August

Weather in Old Saybrook in August maintains its summer characteristics. High temperatures, low cloud coverage, and substantial daylight hours continue to grace the city. Despite a slight decrease in wind speed, the localized sea breeze keeps overall conditions pleasant. Weather in August »

Weather in September

September bridges summer and autumn, showcasing a mix of weather characteristics in Old Saybrook. The summer's warmth lingers, but temperatures start to cool off, signaling the onset of fall. The foliage begins its transformation into vibrant autumn colors, enhanced by the lengthy sunlight hours. Weather in September »

Weather in October

October in Old Saybrook demonstrates a pronounced autumn ambiance. The city is renowned for its splendid fall foliage in October, enhanced by moderate rainfall. As temperatures decline, the days shorten, and the winds pick up speed. Weather in October »

Weather in November

November underscores the arrival of winter’s chill in Old Saybrook. The transformation of the leaves reaches its peak, and they begin to fall, preparing the trees for the winter bareness. Daylight hours drop significantly compared to October, and the overall weather conditions turn colder. Weather in November »

Weather in December

December embodies a typical winter climate in Old Saybrook, Connecticut. The city glows under festive lights, bringing cheer despite the cold weather. With the snowfall increasing, December retains a frosty atmosphere with cooler daylight hours. Weather in December »
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Frequently asked questions

What time of the year is the coldest in Old Saybrook?

With an average high-temperature of 35.2°F (1.8°C) and an average low-temperature of 25.5°F (-3.6°C), January is the coldest month.

How much does it rain in Old Saybrook?

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

When does it snow in Old Saybrook?

Months with snowfall in Old Saybrook, Connecticut, are January through May, November and December.

How much does it snow in Old Saybrook?

Throughout the year, in Old Saybrook, Connecticut, there are 24.2 snowfall days, and 9.53" (242mm) of snow is accumulated.

What is the month with the lowest UV index in Old Saybrook?

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 in Old Saybrook?

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

What are the months with the least sunshine in Old Saybrook?

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

When does it snow the most in Old Saybrook?

March is the month with the most snowfall in Old Saybrook. Snow falls for 4.7 days and accumulates 2.76" (70mm) of snow.

When is Daylight Saving Time (DST) in Old Saybrook?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Old Saybrook, Connecticut, 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 in Old Saybrook?

The least humid month in Old Saybrook is April, with an average relative humidity of 73%.

What are the most humid months in Old Saybrook?

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

When it does not snow in Old Saybrook?

In Old Saybrook, Connecticut, snow does not fall in June through October.

When are the longest days in Old Saybrook?

The month with the longest days in Old Saybrook is June, with an average of 15h and 6min of daylight.

What are the months with the highest UV index in Old Saybrook?

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 in Old Saybrook?

July is Old Saybrook's warmest month, registering average high temperatures of 79.7°F (26.5°C) and lows of 66.6°F (19.2°C).

What month is the ocean warmest in Old Saybrook?

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

What month has the most sunshine in Old Saybrook?

The month with the most sunshine in Old Saybrook is August, with an average of 10.6h of sunshine.

What is the driest month in Old Saybrook?

September is the month with the least rainfall. Rain falls for 13 days and accumulates 1.93" (49mm) of precipitation.

What is the rainiest month in Old Saybrook?

December is the month with the most rainfall in Old Saybrook, Connecticut. Rain falls for 13 days and accumulates 3.66" (93mm) of precipitation.

What is the month with the shortest days in Old Saybrook?

With an average of 9h and 18min of daylight, December has the shortest days of the year in Old Saybrook.

Average temperature
Old Saybrook, CT

Average temperature - Old Saybrook, 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).

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Average pressure
Old Saybrook, CT

Average pressure - Old Saybrook, 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).

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Average wind speed
Old Saybrook, CT

Average wind speed - Old Saybrook, 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).

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Average humidity
Old Saybrook, CT

Average humidity - Old Saybrook, CT

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

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Average rainfall
Old Saybrook, CT

Average rainfall - Old Saybrook, CT

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

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Average rainfall days
Old Saybrook, CT

Average rainfall days - Old Saybrook, 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).

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Average snowfall
Old Saybrook, CT

Average snowfall - Old Saybrook, 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").

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Average snowfall days
Old Saybrook, CT

Average snowfall days - Old Saybrook, 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).

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Average sea temperature
Old Saybrook, CT

Average sea temperature - Old Saybrook, 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).

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Average daylight / Average sunshine
Old Saybrook, CT

Average daylight / Average sunshine - Old Saybrook, 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).

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Average sunshine days
Old Saybrook, CT

Average sunshine days - Old Saybrook, 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).

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Average UV index
Old Saybrook, CT

Average UV index - Old Saybrook, 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).

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Average visibility
Old Saybrook, CT

Average visibility - Old Saybrook, 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).

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Old Saybrook, Connecticut, USA

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