March weather forecast
Chatham, MA

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The calm blue water and white sand on a typical beach in Cape Cod, with a visible path and a far view of the high Chatham Lighthouse, Massachusetts
The calm blue water and white sand on a typical beach in Cape Cod, with a visible path and a far view of the high Chatham Lighthouse, Massachusetts

Weather in March

March is yet another transition month in Chatham, with a shift from the peak of winter towards the initial whispers of spring. The environment becomes warmer, as the highest monthly temperature subtly climbs to 41°F (5°C). This month is marked by considerable rainfall, making it one of the rainiest periods of the year with 1.85" (47mm) of rainfall. It’s time to bring out the raincoats and umbrellas, with more than ten days on average expected to have some precipitation. As March progresses, the warmer weather becomes more pronounced, signaling the beginning of the much-anticipated spring season.

Temperature

The commencement of March records an average high-temperature of a still icy 41°F (5°C), barely varying from February's 39°F (3.9°C). The nighttime temperature in Chatham in March experiences a minor dip, averaging a still icy 35.4°F (1.9°C).

Humidity

In March, the average relative humidity in Chatham is 76%.

Rainfall

In Chatham, during March, the rain falls for 10.8 days and regularly aggregates up to 1.85" (47mm) of precipitation. In Chatham, Massachusetts, during the entire year, the rain falls for 142.4 days and collects up to 22.09" (561mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall in Chatham, Massachusetts. In March, it is snowing for 3.7 days. Throughout March, 0.91" (23mm) of snow is accumulated. Throughout the year, in Chatham, there are 20.8 snowfall days, and 4.37" (111mm) of snow is accumulated.

Ocean temperature

March is the month with the coldest seawater in Chatham, Massachusetts, with an average ocean temperature of 39.9°F (4.4°C).
Note: When swimming, this state is excessively cold, posing a lethal risk. Absent the protection of insulated waterproof wear, hypothermia is likely to occur immediately.

Daylight

The average length of the day in March is 11h and 58min.
On the first day of March in Chatham, Massachusetts, sunrise is at 6:13 am and sunset at 5:30 pm EST. On the last day of the month, sunrise is at 6:23 am and sunset at 7:04 pm EDT.
Note: 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 lasts until Sunday, November 3. 2024, at 2:00 am; consequently, the time zone reverts from EDT to EST.

Sunshine

In Chatham, the average sunshine in March is 5.8h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Chatham. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the average person.
Note: The UV index of 2 during March leads to these advisories:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
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Frequently asked questions

How cold does it get in Chatham in March?

An average high-temperature, in March, in Chatham, is 41°F (5°C) and the average low-temperature is 35.4°F (1.9°C).

What is the average humidity in March in Chatham?

The average relative humidity in March in Chatham is 76%.

How many days does it rain in March in Chatham?

In Chatham, Massachusetts, in March, during 10.8 rainfall days, 1.85" (47mm) of precipitation is typically accumulated.

How many days does it snow in March in Chatham?

In Chatham, in March, during 3.7 snowfall days, 0.91" (23mm) of snow is typically accumulated.

What is the month with the coldest ocean in Chatham?

With an average ocean temperature of 39.9°F (4.4°C), March is the month with the coldest seawater in Chatham.

What is the ocean temperature in March in Chatham?

In Chatham, Massachusetts, the average seawater temperature in March is 39.9°F (4.4°C). For swimming, this is considered life-threatening and very dangerous. The water feels painfully cold, and hyperventilation quickly occurs. A specialized swimsuit is mandatory to reduce thermal damage.

What is the average length of the day in March in Chatham?

The average day length in March in Chatham is 11h and 58min.

When are sunrise and sunset in March in Chatham?

In March, on the first day of the month, sunrise is at 6:13 am and sunset at 5:30 pm EST. On the last day of the month, in Chatham, sunrise is at 6:23 am and sunset at 7:04 pm EDT.

When does Daylight Saving Time (DST) start in March in Chatham?

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

How many hours of sunshine does Chatham have in March?

In Chatham, Massachusetts, the average sunshine duration in March is 5.8h.

When is the lowest UV index in Chatham?

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

What is the UV index intensity in March in Chatham?

In March, the average daily maximum UV index in Chatham is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to Sun's UV rays.
Average high temperature
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in March
Chatham, MA

Average temperature in March - Chatham, MA
  • Average high temperature in March: 41°F

The warmest month (with the highest average high temperature) is August (71.6°F).
The months with the lowest average high temperature are January and February (39°F).

  • Average low temperature in March: 35.4°F

The month with the highest average low temperature is August (68.2°F).
The coldest month (with the lowest average low temperature) is January (31.6°F).

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Average pressure in March
Chatham, MA

Average pressure in March - Chatham, MA
  • Average pressure in March: 30.02"Hg

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in March
Chatham, MA

Average wind speed in March - Chatham, MA
  • Average wind speed in March: 17.6mph

The windiest month (with the highest average wind speed) is January (18mph).
The calmest month (with the lowest average wind speed) is August (11.4mph).

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Average humidity in March
Chatham, MA

Average humidity in March - Chatham, MA
  • Average humidity in March: 76%

The months with the highest relative humidity are June and July (85%).
The month with the lowest relative humidity is November (74%).

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Average rainfall in March
Chatham, MA

Average rainfall in March - Chatham, MA
  • Average rainfall in March: 1.85"

The wettest month (with the highest rainfall) is October (2.83").
The driest month (with the least rainfall) is November (1.46").

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Average rainfall days in March
Chatham, MA

Average rainfall days in March - Chatham, MA
  • Average rainfall days in March: 10.8 days

The month with the highest number of rainy days is May (14.6 days).
The month with the least rainy days is February (8.3 days).

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Average snowfall in March
Chatham, MA

Average snowfall in March - Chatham, MA
  • Average snowfall in March: 0.91"

The month with the highest snowfall is February (1.38").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in March
Chatham, MA

Average snowfall days in March - Chatham, MA
  • Average snowfall days in March: 3.7 days

The month with the highest number of snowfall days is January (6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in March
Chatham, MA

Average sea temperature in March - Chatham, MA
  • Average sea temperature in March: 39.8°F

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 (39.8°F).

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Average daylight in March /
Average sunshine in March
Chatham, MA

Average daylight in March / Average sunshine in March - Chatham, MA
  • Average daylight in March: 12h and 0min

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 12min).

  • Average sunshine in March: 5h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 18min).

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Average sunshine days in March
Chatham, MA

Average sunshine days in March - Chatham, MA
  • Average sunshine days in March: 13.9 days

The month with the most sunshine days is August (17.6 days).
The month with the least sunshine days is January (13 days).

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Average UV index in March
Chatham, MA

Average UV index in March - Chatham, MA
  • Average UV index in March: 2

The months with the highest UV index are 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 cloud cover in March
Chatham, MA

Average cloud cover in March - Chatham, MA
  • Average cloud cover in March: 51

The month with the most cloud cover is December (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in March
Chatham, MA

Average visibility in March - Chatham, MA
  • Average visibility in March: 6mi

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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Chatham, Massachusetts, USA

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