March weather forecast
Castine, ME

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Weather in March

The first month of the spring, March, is a wintry month in Castine, Maine, with temperature in the range of an average high of 37°F (2.8°C) and an average low of 24.3°F (-4.3°C).

Temperature

March's arrival brings a modest temperature shift, moving from a subzero cold 29.8°F (-1.2°C) in February to an icy 37°F (2.8°C). In Castine, the March nights cool down to an average low of 24.3°F (-4.3°C).

Humidity

The average relative humidity in March is 82%.

Rainfall

In Castine, during March, the rain falls for 10.1 days and regularly aggregates up to 1.57" (40mm) of precipitation. Throughout the year, in Castine, there are 141.1 rainfall days, and 24.29" (617mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Castine are January through May, October through December. In Castine, Maine, in March, during 9 snowfall days, 2.76" (70mm) of snow is typically accumulated. In Castine, Maine, during the entire year, snow falls for 44.3 days and aggregates up to 16.81" (427mm) of snow.

Ocean temperature

The month with the coldest seawater is March, with an average ocean temperature of 38.3°F (3.5°C).
Note: In the sphere of swimming, this is extremely cold and poses life-endangering hazards. Hypothermia can occur almost instantly in the absence of insulated waterproof wear.

Daylight

In Castine, the average length of the day in March is 11h and 58min.
On the first day of March, sunrise is at 6:11 am and sunset at 5:23 pm EST. On the last day of the month, sunrise is at 6:16 am and sunset at 7:01 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

The average sunshine in March in Castine is 5.1h.

UV index

The months with the lowest UV index in Castine are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for average individuals.
Note: A maximum daily UV index of 2 during March morphs into the following directions:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
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Frequently asked questions

How cold is March in Castine?

During March, Castine experiences an average high-temperature of 37°F (2.8°C) and a low-temperature of 24.3°F (-4.3°C).

What is the average humidity in March in Castine?

In Castine, Maine, the average relative humidity in March is 82%.

How much does it rain in Castine in March?

In Castine, Maine, during March, the rain falls for 10.1 days and regularly aggregates up to 1.57" (40mm) of precipitation.

How much does it snow in Castine in March?

In March, it is snowing for 9 days. Throughout March, 2.76" (70mm) of snow is accumulated.

What month is the ocean coldest in Castine?

March is the month with the coldest seawater, with an average ocean temperature of 38.3°F (3.5°C).

What is the water temperature in March in Castine?

In March, the average ocean temperature is 38.3°F (3.5°C). For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

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

In March, the average day length in Castine is 11h and 58min.

When are sunrise and sunset in March in Castine?

In March, on the first day of the month, sunrise is at 6:11 am and sunset at 5:23 pm EST. On the last day of the month, in Castine, Maine, sunrise is at 6:16 am and sunset at 7:01 pm EDT.

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

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Castine, Maine, 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 Castine have in March?

The average sunshine duration in March in Castine is 5.1h.

What is the month with the lowest UV index in Castine?

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

What is the UV index intensity in March in Castine?

In March, the average daily maximum UV index in Castine, Maine, is 2. A UV Index value of 2, and less, symbolizes a low health threat 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 March
Castine, ME

Average temperature in March - Castine, ME
  • Average high temperature in March: 37°F

The warmest months (with the highest average high temperature) are July and August (73.9°F).
The month with the lowest average high temperature is January (28.4°F).

  • Average low temperature in March: 24.3°F

The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).

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Average pressure in March
Castine, ME

Average pressure in March - Castine, ME
  • Average pressure in March: 30"Hg

The month with the highest atmospheric pressure is September (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in March
Castine, ME

Average wind speed in March - Castine, ME
  • Average wind speed in March: 10.1mph

The windiest month (with the highest average wind speed) is March (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

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Average humidity in March
Castine, ME

Average humidity in March - Castine, ME
  • Average humidity in March: 82%

The months with the highest relative humidity are February and July (83%).
The month with the lowest relative humidity is November (77%).

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Average rainfall in March
Castine, ME

Average rainfall in March - Castine, ME
  • Average rainfall in March: 1.57"

The wettest month (with the highest rainfall) is December (2.72").
The driest months (with the least rainfall) are July and September (1.46").

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Average rainfall days in March
Castine, ME

Average rainfall days in March - Castine, ME
  • Average rainfall days in March: 10.1 days

The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is February (7.1 days).

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Average snowfall in March
Castine, ME

Average snowfall in March - Castine, ME
  • Average snowfall in March: 2.76"

The month with the highest snowfall is January (4.57").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in March
Castine, ME

Average snowfall days in March - Castine, ME
  • Average snowfall days in March: 9 days

The month with the highest number of snowfall days is January (10.1 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in March
Castine, ME

Average sea temperature in March - Castine, ME
  • Average sea temperature in March: 38.2°F

The best month for swimming (with the highest average sea temperature) is August (58.6°F).
The coldest month (with the lowest average sea temperature) is March (38.2°F).

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Average daylight in March /
Average sunshine in March
Castine, ME

Average daylight in March / Average sunshine in March - Castine, ME
  • Average daylight in March: 12h and 0min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in March: 5h and 1min

The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).

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Average sunshine days in March
Castine, ME

Average sunshine days in March - Castine, ME
  • Average sunshine days in March: 14.5 days

The month with the most sunshine days is September (17.9 days).
The month with the least sunshine days is April (11.7 days).

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Average UV index in March
Castine, ME

Average UV index in March - Castine, ME
  • Average UV index in March: 2

The months with the highest UV index are June, July and August (UV index 5).
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
Castine, ME

Average cloud cover in March - Castine, ME
  • Average cloud cover in March: 55

The month with the most cloud cover is March (Cloud cover 55).
The months with the least cloud cover are August and September (Cloud cover 37).

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Average visibility in March
Castine, ME

Average visibility in March - Castine, ME
  • Average visibility in March: 6mi

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

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Castine, Maine, USA

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