April 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 April

April in Chatham witnesses the onset of a wonderful spring season, with temperatures ascending, averaging approximately 46.9°F (8.3°C) as the monthly high. This month distinguishes itself from the comparatively rainier season of March, with a marginal increase in rainfall to 2.05" (52mm). Nevertheless, the predominant weather pattern for april is a mix of the occasional rain shower and a moderate temperature range. April ushers in a series of warmer and sunnier days, with the longer daylight hours offering more opportunities for outdoor activities. As the month ends, Chatham's weather noticeably leans towards the impending summer season, promising sunnier and warmer days ahead.

Temperature

The start of April is characterized by a subtle increase in the average high-temperature, transitioning from a wintry 41°F (5°C) in March to a chilly 46.9°F (8.3°C). Throughout the nights in April, Chatham notes an average low of 42.4°F (5.8°C), a small dip from the daytime peak.

Humidity

In April, the average relative humidity is 80%.

Rainfall

In April, the rain falls for 13.1 days. Throughout April, 2.05" (52mm) of precipitation is accumulated. In Chatham, during the entire year, the rain falls for 142.4 days and collects up to 22.09" (561mm) of precipitation.

Snowfall

Months with snowfall are January through April, November and December. April is the last month it regularly snows. During 0.8 snowfall days, in April, Chatham aggregates 0.04" (1mm) of snow. Throughout the year, in Chatham, there are 20.8 snowfall days, and 4.37" (111mm) of snow is accumulated.

Ocean temperature

In Chatham, Massachusetts, the average seawater temperature in April is 43.2°F (6.2°C).
Note: Staying in 43.2°F (6.2°C) waters for just a few moments at 55.4°F (13°C) can be harrowing, and below 50°F (10°C) poses breathing and cold shock risks, depending on individual tolerance.

Daylight

In Chatham, the average length of the day in April is 13h and 22min.
On the first day of April, sunrise is at 6:21 am and sunset at 7:05 pm. On the last day of the month, sunrise is at 5:36 am and sunset at 7:37 pm EDT.

Sunshine

In April, the average sunshine is 8.3h.

UV index

In Chatham, the average daily maximum UV index in April is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily high UV index of 3 in April translates into this advice:
Make use of precautions - It is urged to ward off sun damage. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Opt for tightly woven and loose clothing to enhance protection from the Sun. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
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Frequently asked questions

What is the temperature in April in Chatham?

The high-temperature in Chatham during April is 46.9°F (8.3°C) and the low-temperature is 42.4°F (5.8°C).

What is the average humidity in April in Chatham?

In Chatham, the average relative humidity in April is 80%.

How much does it rain in Chatham in April?

In Chatham, during April, the rain falls for 13.1 days and regularly aggregates up to 2.05" (52mm) of precipitation.

What is the last month it snows in Chatham?

April is the last month it regularly snows. During 0.8 snowfall days, in April, Chatham aggregates 0.04" (1mm) of snow.

What is the ocean temperature in April in Chatham?

In April, the average ocean temperature in Chatham, Massachusetts, is 43.2°F (6.2°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

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

In April, the average day length in Chatham, Massachusetts, is 13h and 22min.

What time are sunrise and sunset in April in Chatham?

On the first day of April, sunrise is at 6:21 am and sunset at 7:05 pm. On the last day of the month, sunrise is at 5:36 am and sunset at 7:37 pm EDT.

How many hours of sunshine does Chatham have in April?

The average sunshine duration in April is 8.3h.

How high is the UV index in April in Chatham?

In April, the average daily maximum UV index in Chatham, Massachusetts, is 3. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from exposure to the Sun's UV radiation.
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 April
Chatham, MA

Average temperature in April - Chatham, MA
  • Average high temperature in April: 46.9°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 April: 42.4°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 April
Chatham, MA

Average pressure in April - Chatham, MA
  • Average pressure in April: 29.98"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 April
Chatham, MA

Average wind speed in April - Chatham, MA
  • Average wind speed in April: 15.2mph

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 April
Chatham, MA

Average humidity in April - Chatham, MA
  • Average humidity in April: 80%

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 April
Chatham, MA

Average rainfall in April - Chatham, MA
  • Average rainfall in April: 2.05"

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 April
Chatham, MA

Average rainfall days in April - Chatham, MA
  • Average rainfall days in April: 13.1 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 April
Chatham, MA

Average snowfall in April - Chatham, MA
  • Average snowfall in April: 0.04"

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 April
Chatham, MA

Average snowfall days in April - Chatham, MA
  • Average snowfall days in April: 0.8 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 April
Chatham, MA

Average sea temperature in April - Chatham, MA
  • Average sea temperature in April: 43.2°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 April /
Average sunshine in April
Chatham, MA

Average daylight in April / Average sunshine in April - Chatham, MA
  • Average daylight in April: 13h and 2min

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 April: 8h and 2min

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 April
Chatham, MA

Average sunshine days in April - Chatham, MA
  • Average sunshine days in April: 14.5 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 April
Chatham, MA

Average UV index in April - Chatham, MA
  • Average UV index in April: 3

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 April
Chatham, MA

Average cloud cover in April - Chatham, MA
  • Average cloud cover in April: 46

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 April
Chatham, MA

Average visibility in April - Chatham, MA
  • Average visibility in April: 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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