Climate and monthly weather forecast
Lexington, MA

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Weather in January

January, like December, in Lexington, Massachusetts, is another cold winter month, with temperature in the range of an average low of 21.6°F (-5.8°C) and an average high of 32.9°F (0.5°C). The lowest temperatures are recorded in January, with averages reaching a high of 32.9°F (0.5°C) and a low of 21.6°F (-5.8°C). Weather in January »

Weather in February

The last month of the winter, February, is also a wintry month in Lexington, Massachusetts, with an average temperature fluctuating between 35.8°F (2.1°C) and 21.9°F (-5.6°C). As Lexington, Massachusetts, transitions into February, the average high-temperature stands at a still wintry 35.8°F (2.1°C), offering little variation from the preceding month. Weather in February »

Weather in March

March, the first month of the spring in Lexington, is a chilly month, with an average temperature fluctuating between 29.1°F (-1.6°C) and 43°F (6.1°C). The shift into March brings a slight increase in the average high-temperature, moving from a cold 35.8°F (2.1°C) in February to a frosty 43°F (6.1°C). Weather in March »

Weather in April

April in Lexington, Massachusetts, is a mild spring month, with temperature in the range of an average high of 55.9°F (13.3°C) and an average low of 39.6°F (4.2°C). The arrival of April signals an increase in the average high-temperature, moving from a frosty 43°F (6.1°C) in March to a mild 55.9°F (13.3°C). Weather in April »

Weather in May

May, the last month of the spring in Lexington, is an enjoyable month, with an average temperature ranging between min 49.1°F (9.5°C) and max 66.9°F (19.4°C). In May, the average high-temperature increases from a moderate 55.9°F (13.3°C) in April to an enjoyable 66.9°F (19.4°C). Weather in May »

Weather in June

June, the first month of the summer in Lexington, is a moderately hot month, with an average temperature varying between 75.4°F (24.1°C) and 56.8°F (13.8°C). The arrival of June brings a soft temperature shift, with the average high-temperature nudging from a comfortable 66.9°F (19.4°C) in May to a moderately hot 75.4°F (24.1°C). Weather in June »

Weather in July

July, like June, in Lexington, Massachusetts, is a moderately hot summer month, with temperature in the range of an average high of 82°F (27.8°C) and an average low of 63.9°F (17.7°C). July, noted for its average high-temperature of 82°F (27.8°C) and an average low-temperature of 63.9°F (17.7°C), is considered the warmest month. The heat index value during July is evaluated at a hot 87.8°F (31°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Lexington, Massachusetts, with an average temperature varying between 62.4°F (16.9°C) and 81°F (27.2°C). With the start of August, Lexington measures an average high-temperature of a still warm 81°F (27.2°C), not significantly differing from July's 82°F (27.8°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a pleasant month in Lexington, Massachusetts, with an average temperature varying between 72.9°F (22.7°C) and 56.3°F (13.5°C). The transition to September results in a modest reduction in average high-temperature, moving from a warm 81°F (27.2°C) in August to an agreeable 72.9°F (22.7°C). Weather in September »

Weather in October

October, the same as September, in Lexington, Massachusetts, is another refreshing autumn month, with temperature in the range of an average high of 60.3°F (15.7°C) and an average low of 46.8°F (8.2°C). October weather is marked by a drop in the average high-temperature, falling from a pleasant 72.9°F (22.7°C) in September to a mild 60.3°F (15.7°C). Weather in October »

Weather in November

November, the last month of the autumn in Lexington, is also a frosty month, with temperature in the range of an average low of 36.1°F (2.3°C) and an average high of 49.1°F (9.5°C). A moderate decline in the average high-temperature is seen during November, decreasing from a mild 60.3°F (15.7°C) in October to a chilly 49.1°F (9.5°C). Weather in November »

Weather in December

December, the first month of the winter in Lexington, is also a wintry month, with an average temperature varying between 38.5°F (3.6°C) and 28.2°F (-2.1°C). Arrival of December comes with a reduction in the average high-temperature, falling from a frosty 49.1°F (9.5°C) in November to a cold 38.5°F (3.6°C). Weather in December »
Updated: Jun 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the coldest?

The coldest period tends to be January, when average temperatures fluctuate between a high of 32.9°F (0.5°C) and a low of 21.6°F (-5.8°C).

How much does it rain?

In Lexington, during the entire year, the rain falls for 143.4 days and collects up to 27.52" (699mm) of precipitation.

When does it snow?

January through May, October through December are months with snowfall.

How much does it snow?

Throughout the year, there are 31.2 snowfall days, and 19.88" (505mm) of snow is accumulated.

What is the most humid month?

The most humid month is February, with an average relative humidity of 78%.

When does it snow the most?

February is the month with the most snowfall. Snow falls for 7.7 days and accumulates 5.35" (136mm) of snow.

What is the month with the least sunshine?

February has the least sunshine of the year, with an average of 4.6h of sunshine.

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 in Lexington?

April is the least humid month, with an average relative humidity of 70%.

When it does not snow?

In Lexington, snow does not fall in June through September.

When are the longest days?

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

What are the months with the highest UV index?

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

What month is the hottest?

The warmest time of the year is July, with temperatures averaging a high of 82°F (27.8°C) and a low of 63.9°F (17.7°C).

What month has the most sunshine?

With an average of 10.5h of sunshine, August has the most sunshine of the year.

What is the driest month?

September is the month with the least rainfall. Rain falls for 10.9 days and accumulates 1.38" (35mm) of precipitation.

What is the rainiest month?

The month with the most rainfall is December, when the rain falls for 9.9 days and typically aggregates up to 2.91" (74mm) of precipitation.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 6min of daylight.

When is the lowest UV index in Lexington?

December is the month with the lowest UV index, with an average maximum UV index of 1.

Average temperature
Lexington, MA

Average temperature - Lexington, MA

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (32.9°F).

The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).

Average pressure
Lexington, MA

Average pressure - Lexington, MA

The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed
Lexington, MA

Average wind speed - Lexington, MA

The windiest month (with the highest average wind speed) is January (9mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).

Average humidity
Lexington, MA

Average humidity - Lexington, MA

The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (70%).

Average rainfall
Lexington, MA

Average rainfall - Lexington, MA

The wettest month (with the highest rainfall) is December (2.91").
The driest month (with the least rainfall) is September (1.38").

Average rainfall days
Lexington, MA

Average rainfall days - Lexington, MA

The month with the highest number of rainy days is July (15.5 days).
The month with the least rainy days is January (7.3 days).

Average snowfall
Lexington, MA

Average snowfall - Lexington, MA

The month with the highest snowfall is February (5.35").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days
Lexington, MA

Average snowfall days - Lexington, MA

The month with the highest number of snowfall days is January (7.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine
Lexington, MA

Average daylight / Average sunshine - Lexington, 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 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

Average sunshine days
Lexington, MA

Average sunshine days - Lexington, MA

The months with the most sunshine days are January and November (17.5 days).
The month with the least sunshine days is July (13.8 days).

Average visibility
Lexington, MA

Average visibility - Lexington, MA

The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is February (5mi).

Lexington, Massachusetts, USA

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