April weather forecast and climate
Belfast, ME

April is a frosty spring month in Belfast, Maine, with average temperature fluctuating between 34.5°F (1.4°C) and 48.9°F (9.4°C).

Temperature

In Belfast, the average high-temperature in April increases, from a cold 37°F (2.8°C) in March, to a chilly 48.9°F (9.4°C). In Belfast, the average low-temperature is 34.5°F (1.4°C).

Humidity

In Belfast, the average relative humidity is 78%.

Rainfall

In Belfast, Maine, during April, the rain falls for 15 days and regularly aggregates up to 2.64" (67mm) of precipitation. In Belfast, during the entire year, the rain falls for 141.1 days and collects up to 24.29" (617mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. In Belfast, Maine, snow falls for 2.9 days, with typically accumulated 2.17" (55mm) of snow. Throughout the year, in Belfast, Maine, there are 44.3 snowfall days, and 16.81" (427mm) of snow is accumulated.

Ocean temperature

In April, the average ocean temperature in Belfast is 40.6°F (4.8°C).
Note: For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

Daylight

In April, the average length of the day in Belfast is 13.5h.

Sunshine

The average sunshine in Belfast, Maine, is 7.1h.

UV index

The average daily maximum UV index in Belfast, Maine, is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to the Sun's UV rays for the average person.
Note: In April, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in April in Belfast?

The average high-temperature, in April, in Belfast, Maine, is 48.9°F (9.4°C), while the average low-temperature is 34.5°F (1.4°C).

What is the average humidity in April in Belfast?

In Belfast, the average relative humidity in April is 78%.

How much does it rain in Belfast in April?

In Belfast, Maine, during April, the rain falls for 15 days and regularly aggregates up to 2.64" (67mm) of precipitation.

How many days does it snow in April in Belfast?

In Belfast, Maine, in April, snow falls for 2.9 days, with typically accumulated 2.17" (55mm) of snow.

What is the water temperature in April in Belfast?

In Belfast, in April, the average water temperature is 40.6°F (4.8°C). For swimming, this is considered very dangerous and immediately life-threatening. Total loss of breathing control instantly occurs, and clear thinking becomes almost impossible. A specialized swimsuit is obligatory to minimize thermal loss.

How many hours of daylight does Belfast have in April?

The average length of the day in April in Belfast, Maine, is 13.5h.

How many hours of sunshine does Belfast have in April?

The average sunshine in April in Belfast is 7.1h.

How high is the UV index in April in Belfast?

In April, the average daily maximum UV index in Belfast, Maine, is 3. A UV Index estimate of 3 to 5 represents a medium health risk from unsafe exposure to the Sun's UV rays.
Average temperature in April - Belfast, ME
  • Average high temperature in April: 48.9°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 April: 34.5°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).

Average pressure in April - Belfast, ME
  • Average pressure in April: 29.95"

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

Average wind speed in April - Belfast, ME
  • Average wind speed in April: 9.1mph

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).

Average humidity in April - Belfast, ME
  • Average humidity in April: 78%

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

Average rainfall in April - Belfast, ME
  • Average rainfall in April: 2.64"

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

Average rainfall days in April - Belfast, ME
  • Average rainfall days in April: 15 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).

Average snowfall in April - Belfast, ME
  • Average snowfall in April: 2.17"

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

Average snowfall days in April - Belfast, ME
  • Average snowfall days in April: 2.9 days

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

Average sea temperature in April - Belfast, ME
  • Average sea temperature in April: 40.7°F

The best month for swimming (with the highest average sea temperature) is August (60.4°F).
The coldest month (with the lowest average sea temperature) is March (37.8°F).

Average daylight in April / Average sunshine in April - Belfast, ME
  • Average daylight in April: 13.5h

The month with the longest days is June (Average daylight: 15.5h).
The month with the shortest days is December (Average daylight: 8.9h).

  • Average sunshine in April: 7.1h

The month with the most sunshine is August (Average sunshine: 9.9h).
The month with the least sunshine is February (Average sunshine: 4.3h).

Average sunshine days in April - Belfast, ME
  • Average sunshine days in April: 11.7 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).

Average UV index in April - Belfast, ME
  • Average UV index in April: 3

Months with the highest UV index are June, July and August (UV index 5).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in April - Belfast, ME
  • Average cloud cover in April: 54

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

Average visibility in April - Belfast, ME
  • Average visibility in April: 6mi

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