April weather forecast
Belfast, United Kingdom

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The Northern Ireland City Hall located in Belfast, United Kingdom
The Northern Ireland City Hall located in Belfast, United Kingdom

Weather in April

April experiences a dramatic climatic shift in Belfast, with the temperature range hovering between 4.9°C (40.8°F) to 10.8°C (51.4°F). This month marks a turning point as no snowfall is recorded, signifying the definitive end of winter. The pleasant weather along with extended daylight hours give a boost to outdoor activities and tourism. With the prolonged sun exposure, the sea temperature also starts to rise, making coastal areas lively. In essence, April embodies the heart of spring with warming trends, absence of snowfall, longer days and inviting sea temperatures.

Temperature

Entering April, the average high-temperature is recorded at a fresh 10.8°C (51.4°F), exhibiting a minimal shift from March's 8.5°C (47.3°F). Belfast experiences a mean temperature of 4.9°C (40.8°F) during April nights.

Humidity

The months with the lowest humidity in Belfast are April and May, with an average relative humidity of 83%.

Rainfall

In Belfast, during April, the rain falls for 16.1 days and regularly aggregates up to 39mm (1.54") of precipitation. In Belfast, during the entire year, the rain falls for 220.2 days and collects up to 626mm (24.65") of precipitation.

Snowfall

April through October are months without snowfall.

Sea temperature

In Belfast, in April, the average water temperature is 8.8°C (47.8°F).
Note: Swimming in 8.8°C (47.8°F) is deemed hazardous. Exposure to temperatures below 10°C (50°F) leads to immediate severe cold shock and hyperventilation.

Daylight

In Belfast, the average length of the day in April is 14h and 7min.
On the first day of the month, sunrise is at 6:54 am and sunset at 8:00 pm. On the last day of April, in Belfast, sunrise is at 5:45 am and sunset at 8:56 pm BST.

Sunshine

In Belfast, the average sunshine in April is 6.7h.

UV index

In Belfast, 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 ordinary individuals.
Note: An average UV index of 3 in April transforms into this advice:
Exercise prevention - Precautions against solar damage are endorsed. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
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Frequently asked questions

What is the average April temperature in Belfast?

In April, in Belfast, the average high-temperature is 10.8°C (51.4°F), and the average low-temperature is 4.9°C (40.8°F).

What is the least humid month in Belfast?

April and May, with an average relative humidity of 83%, are the least humid months in Belfast.

What is the average humidity in April in Belfast?

In Belfast, United Kingdom, the average relative humidity in April is 83%.

How many days does it rain in April in Belfast?

In Belfast, United Kingdom, in April, it is raining for 16.1 days, with typically 39mm (1.54") of accumulated precipitation.

When it does not snow in Belfast?

April through October are months without snowfall.

Does it snow in Belfast in April?

In April, in Belfast, it doesn't snow. March is the latest month when it typically snows.

What is the water temperature in April in Belfast?

In April, the average sea temperature in Belfast, United Kingdom, is 8.8°C (47.8°F). Swimming in 8.8°C (47.8°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.

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

In Belfast, United Kingdom, the average day length in April is 14h and 7min.

When is the sunrise / sunset in April in Belfast?

In April, on the first day of the month, sunrise is at 6:54 am and sunset at 8:00 pm. On the last day of the month, in Belfast, United Kingdom, sunrise is at 5:45 am and sunset at 8:56 pm BST.

How many hours of sunshine does Belfast have in April?

In April, the average sunshine duration in Belfast is 6.7h.

What is the UV index reading in April in Belfast?

In Belfast, United Kingdom, the average daily maximum UV index in April is 3. A UV Index reading of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in April
Belfast, United Kingdom

Average temperature in April - Belfast, United Kingdom
  • Average high temperature in April: 10.8°C

The warmest month (with the highest average high temperature) is July (16.9°C).
The month with the lowest average high temperature is January (6.8°C).

  • Average low temperature in April: 4.9°C

The month with the highest average low temperature is August (11.3°C).
The coldest month (with the lowest average low temperature) is February (2.8°C).

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Average pressure in April
Belfast, United Kingdom

Average pressure in April - Belfast, United Kingdom
  • Average pressure in April: 1014.5mbar

The month with the highest atmospheric pressure is May (1015.6mbar).
The month with the lowest atmospheric pressure is November (1007.3mbar).

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Average wind speed in April
Belfast, United Kingdom

Average wind speed in April - Belfast, United Kingdom
  • Average wind speed in April: 16.3km/h

The windiest month (with the highest average wind speed) is January (21.3km/h).
The calmest months (with the lowest average wind speed) are June and July (13.7km/h).

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Average humidity in April
Belfast, United Kingdom

Average humidity in April - Belfast, United Kingdom
  • Average humidity in April: 83%

The months with the highest relative humidity are January and December (88%).
The months with the lowest relative humidity are April and May (83%).

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Average rainfall in April
Belfast, United Kingdom

Average rainfall in April - Belfast, United Kingdom
  • Average rainfall in April: 39mm

The wettest month (with the highest rainfall) is August (72mm).
The driest month (with the least rainfall) is May (38mm).

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Average rainfall days in April
Belfast, United Kingdom

Average rainfall days in April - Belfast, United Kingdom
  • Average rainfall days in April: 16.1 days

The month with the highest number of rainy days is August (23 days).
The month with the least rainy days is April (16.1 days).

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Average snowfall in April
Belfast, United Kingdom

Average snowfall in April - Belfast, United Kingdom
  • Average snowfall in April: 0mm

The month with the highest snowfall is February (25mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).

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Average snowfall days in April
Belfast, United Kingdom

Average snowfall days in April - Belfast, United Kingdom
  • Average snowfall days in April: 0 days

The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average sea temperature in April
Belfast, United Kingdom

Average sea temperature in April - Belfast, United Kingdom
  • Average sea temperature in April: 8.8°C

The best month for swimming (with the highest average sea temperature) is September (14.3°C).
The coldest month (with the lowest average sea temperature) is March (8°C).

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Average daylight in April /
Average sunshine in April
Belfast, United Kingdom

Average daylight in April / Average sunshine in April - Belfast, United Kingdom
  • Average daylight in April: 14h and 1min

The month with the longest days is June (Average daylight: 17h and 12min).
The month with the shortest days is December (Average daylight: 7h and 24min).

  • Average sunshine in April: 6h and 4min

The month with the most sunshine is June (Average sunshine: 7h and 18min).
The month with the least sunshine is February (Average sunshine: 3h and 30min).

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Average sunshine days in April
Belfast, United Kingdom

Average sunshine days in April - Belfast, United Kingdom
  • Average sunshine days in April: 11.5 days

The month with the most sunshine days is April (11.5 days).
The month with the least sunshine days is August (5.6 days).

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Average UV index in April
Belfast, United Kingdom

Average UV index in April - Belfast, United Kingdom
  • Average UV index in April: 3

The months with the highest UV index are May, June, July and August (UV index 4).
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
Belfast, United Kingdom

Average cloud cover in April - Belfast, United Kingdom
  • Average cloud cover in April: 55

The months with the most cloud cover are January and February (Cloud cover 63).
The month with the least cloud cover is April (Cloud cover 55).

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Average visibility in April
Belfast, United Kingdom

Average visibility in April - Belfast, United Kingdom
  • Average visibility in April: 9km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).

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Belfast, United Kingdom

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