Climate and monthly weather forecast
Lynn, MA

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Large rocks on the shores of the coast of Lynn Massachusetts
Large rocks on the shores of the coast of Lynn Massachusetts

The climate of Lynn

Lynn, Massachusetts, USA, exhibits a Humid Subtropical climate, identified as Cfa according to the Köppen climate classification. Positioned in the northern hemisphere, its climate is characterized by significant temperature differences throughout the year, coupled with regular precipitation distribution, without a real dry season.

Examining monthly average weather parameters, it becomes evident that Lynn's weather swings from bitter cold to tropical warmth. During the colder months, from December to February, the average low temperatures range from 23.4°F (-4.8°C) to 30.9°F (-0.6°C), while high temperatures vary from 34.2°F (1.2°C) to 42.4°F (5.8°C). Conversely, these numbers substantially increase from June to August, with low temperatures fluctuating from 65.3°F (18.5°C) to 80.4°F (26.9°C), and high temperatures reaching up to 79.3°F (26.3°C) to 80.4°F (26.9°C).

With regards to precipitation throughout the year, rainfall evenly distributes, ranging from 1.42" (36mm) in September to 2.99" (76mm) in December. The maximum snowfall, 4.61" (117mm), usually occurs in February. Moving onto relative humidity, it slightly fluctuates throughout the year, with values peaking at 77% in February and dropping to the lowest at 70% in April.

One noteworthy pattern emerges in the realm of daylight hours. Lynn receives the least daylight, 9.1 hours, in December and the most daylight of 15.3 hours in June. This is complemented by the highest average of sunshine hours per day, 10.4 hours, in August.

The best time to visit Lynn

In light of the ascertained climatological characteristics, the best period to visit Lynn would be from June to September. During this span, the city experiences temperatures that range between a comfortable 64.6°F (18.1°C) and a warm 80.4°F (26.9°C). Furthermore, these months garner the longest daylight hours, ranging from 12.5 to 15.3 hours. This, coupled with the highest sunshine per day averaging minutes from 8.3 to 10.4 hours, makes this time of the year ideal for outdoor activities and sightseeing.

The worst time to visit Lynn

Conversely, the least favorable time to visit Lynn can be determined as the months between December and February. The city endures the lowest average temperatures in this period, plummeting to 23.4°F (-4.8°C) while barely reaching 42.4°F (5.8°C). Alongside this, a significant quantity of snowfall occurs, with bountiful accumulations reaching as high as 4.61" (117mm) in February. Shorter daylight hours, with an average of 9.1 hours coupled with reduced average sunshine duration of 4.6 hours per day, further limit outdoor exploration opportunities.

Spring weather in Lynn

Lynn welcomes spring with gradually warming temperatures and increased daylight. During these months, March, April, and May, high temperatures are on the rise, moving from 42.4°F (5.8°C) to 64.8°F (18.2°C). On the contrary, low temperatures likewise ascend, varying from 30.9°F (-0.6°C) to 49.8°F (9.9°C). Rainfall also experiences a sequential increase, starting from 2.83" (72mm) in March to 2.87" (73mm) in April, offering the city a fresh, revitalizing atmosphere. The daylight duration extends from 12 hours in March to an impressive 14.6 hours by May.

Summer weather in Lynn

During the summer months of June to August, Lynn experiences the highest temperatures. High temperatures range from 73°F (22.8°C) to 80.4°F (26.9°C), while low temperatures register between 57.4°F (14.1°C) to 65.3°F (18.5°C). June is the wettest month during this period, recording a rainfall amount of 2.24" (57mm). What makes summers enjoyable in Lynn is the abundant daylight - from 15.3 hours in June, slightly tapering off to 13.8 hours in August.

Autumn weather in Lynn

With the arrival of autumn, temperatures gradually decrease in Lynn. The high temperatures dip from 71.6°F (22°C) in September to a cooler 49.5°F (9.7°C) in November, while the lows fall between 57.9°F (14.4°C) to 38.3°F (3.5°C). Rainfall amounts are substantially higher in October and November with 2.6" (66mm) and 2.72" (69mm), respectively. Daylight hours reduce from 12.5 in September to 9.8 hours by November, marking the transition into the cooler months.

Winter weather in Lynn

Winter in Lynn brings about the lowest temperatures along with the shortest daylight hours. From December to February, the high temperatures oscillate between 34.2°F (1.2°C) to 42.4°F (5.8°C) while the low temperatures hit their nadir, fluctuating from 23.4°F (-4.8°C) to 30.9°F (-0.6°C). December sees the highest rainfall during this time, recording 2.99" (76mm). The city also experiences the most snowfall in February, accumulating up to 4.61" (117mm). Daylight in winter is at its minimum, fluctuating from 9.5 hours in December to 10.6 hours in February. Regardless, the city still presents a picturesque winter landscape, especially appealing to those who relish the cold.

Weather in January

January in Lynn, Massachusetts sets the stage for a typical winter in the northeastern United States, with chill in the air and snow on the ground adding a festive touch. The weather changes from mild to severe, with the temperature plunging to 23.4°F (-4.8°C) and the city blanketed by an average snowfall of 2.76" (70mm). Weather in January »

Weather in February

February in Lynn retains the essence of winter, while making a subtle transition towards spring. It noticeably warms up from January, as the lowest temperature increases to 24.6°F (-4.1°C) and snowfall decreases, leading to 4.61" (117mm). Weather in February »

Weather in March

March in Lynn signifies the onset of spring, as the city basks in a warmer glow compared to the preceding winter months. There are lower chances of encountering snow as this month witnesses the last snowfall of 3.5" (89mm) for the winter season. Weather in March »

Weather in April

April in Lynn experiences a significant leap from winter, as temperatures start to climb. Snowfall is supreme rarity with an almost ignorable count of just 0.59" (15mm). Sea temperatures start to pick up, though they are still somewhat chilly for swimming. Weather in April »

Weather in May

May brings a pre-summer warmth to Lynn with mild spikes in temperatures. The month doesn’t see any snowfall and the average lowest temperature jumps to a comfortable 49.8°F (9.9°C). Pleasant sea temperatures urge locals and visitors to take a dip. Weather in May »

Weather in June

The weather in June sees Lynn entering the throes of summertime. The warmth builds up with temperatures soaring above the 70°F (21.1°C) mark. Sea temperatures hit the highs of 50s°F, which is refreshing and inviting for beach-goers. Weather in June »

Weather in July

July in Lynn, the peak of summer, is typified by high temperatures, longer daylight periods, and minimal rainfall. It records the highest average temperature rise to 80.4°F (26.9°C) and the sea surface temperature reaching its peak at 65.9°F (18.8°C). Weather in July »

Weather in August

As August arrives in Lynn, the city experiences a slight dip in the overall temperature from July. This month remarkably records the lowest average precipitation of 1.81" (46mm), indicating lesser disruptions for outdoor plans. Sea temperatures continue to stay warm, offering a perfect solution to beat the summer heat. Weather in August »

Weather in September

September brings many delightful changes to the weather pattern in Lynn. The city experiences a remarkable drop in air temperatures and a further decrease in precipitation amounting to 1.42" (36mm). The sea temperature stays comforting, while the decreasing daylight signals the advent of autumn. Weather in September »

Weather in October

October witnesses the city of Lynn transitioning into the cooler months. The breeze has a sharper nip to it and the city sees sporadic showers with rainfall steadily increasing. The sea temperature drops below the 60°F (15.6°C) mark, signaling the end of the swimming season. Weather in October »

Weather in November

As November rolls in, Lynn readies for winter. The temperature continues to dip, reaching lows of 38.3°F (3.5°C). With a notable increase in rainfall to 2.72" (69mm), the city covers up for the impending cold season. Light snowfall makes its first appearance after a long pause. Weather in November »

Weather in December

Finally, December greets Lynn with a distinct winter chill, recording an average temperature drop to 30.2°F (-1°C). This month sees an upward spike in snowfall, reaching 3.43" (87mm) indicating that Christmas is round the corner. Weather in December »
Updated: Jun 4, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the coldest months?

Lynn's temperature records reveal January as the coldest month, marked by average highs of 34.2°F (1.2°C) and lows of 23.4°F (-4.8°C).

How many days does it rain?

In Lynn, during the entire year, the rain falls for 144.9 days and collects up to 27.91" (709mm) of precipitation.

When does it snow?

Months with snowfall are January through April, October through December.

How much does it snow?

Throughout the year, there are 29.9 snowfall days, and 15.59" (396mm) of snow is accumulated.

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.

What is the most humid month?

February is the most humid month, with an average relative humidity of 77%.

When does it snow the most?

February is the month with the most snowfall. Snow falls for 7.7 days and accumulates 4.61" (117mm) of snow.

When is the ocean coldest?

February and March, with an average ocean temperature of 38.8°F (3.8°C), are months with the coldest seawater.

What is the month with the least sunshine?

The months with the least sunshine are February and December, with an average of 4.6h of sunshine.

When is Daylight Saving Time (DST) in Lynn?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Lynn, 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 70%, April is the least humid month in Lynn, Massachusetts.

When it does not snow?

May through September are months without snowfall.

When are the longest days?

June has the longest days of the year, with an average of 15h and 12min of daylight.

When is the highest UV index in Lynn?

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

What are the warmest months?

With average temperatures fluctuating between a high of 80.4°F (26.9°C) and a low of 65.3°F (18.5°C), July stands out as the warmest month.

What month is the ocean warmest?

August is the month with the warmest seawater, with an average ocean temperature of 67.6°F (19.8°C).

What month has the most sunshine?

August has the most sunshine of the year, with an average of 10.4h of sunshine.

What is the driest month?

September is the month with the least rainfall. Rain falls for 11.5 days and accumulates 1.42" (36mm) of precipitation.

What is the wettest month?

The month with the most rainfall is December, when the rain falls for 10.3 days and typically aggregates up to 2.99" (76mm) of precipitation.

What is the month with the shortest days in Lynn?

With an average of 9h and 6min of daylight, December has the shortest days of the year.
Today
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Average temperature
Lynn, MA

Average temperature - Lynn, MA

The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (34.2°F).

The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).

Average pressure
Lynn, MA

Average pressure - Lynn, MA

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed
Lynn, MA

Average wind speed - Lynn, MA

The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

Average humidity
Lynn, MA

Average humidity - Lynn, MA

The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is April (70%).

Average rainfall
Lynn, MA

Average rainfall - Lynn, MA

The wettest month (with the highest rainfall) is December (2.99").
The driest month (with the least rainfall) is September (1.42").

Average rainfall days
Lynn, MA

Average rainfall days - Lynn, MA

The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is January (7.1 days).

Average snowfall
Lynn, MA

Average snowfall - Lynn, MA

The month with the highest snowfall is February (4.61").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days
Lynn, MA

Average snowfall days - Lynn, MA

The months with the highest number of snowfall days are January and February (7.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average sea temperature
Lynn, MA

Average sea temperature - Lynn, MA

The best month for swimming (with the highest average sea temperature) is August (67.6°F).
The coldest month (with the lowest average sea temperature) is March (38.8°F).

Average daylight / Average sunshine
Lynn, MA

Average daylight / Average sunshine - Lynn, MA

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).

The month with the most sunshine is August (Average sunshine: 10h and 24min).
The months with the least sunshine are February and December (Average sunshine: 4h and 36min).

Average sunshine days
Lynn, MA

Average sunshine days - Lynn, MA

The month with the most sunshine days is January (17.8 days).
The month with the least sunshine days is April (13.2 days).

Average UV index
Lynn, MA

Average UV index - Lynn, MA

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
Lynn, MA

Average cloud cover - Lynn, MA

The month with the most cloud cover is March (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 32).

Average visibility
Lynn, MA

Average visibility - Lynn, MA

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).

Lynn, Massachusetts, USA

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