April Weather in Belfast, United States

Last updated: June 24, 2025

In April, the average temperature in Belfast, United States hovers around 6°C (43°F). Expect a range where the minimum dips to a chilly -5°C (23°F), while the maximum can climb to a comfortable 22°C (73°F). Prepare for about 131 mm (5.2 in) of precipitation over 12 days, contributing to an average humidity of 81%.

April Temperature in Belfast

In April in Belfast, the average temperature is 6°C (43°F). Maximum temperatures can reach up to 22°C (73°F), while minimums can drop as low as -5°C (23°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

April Weather in Belfast: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Belfast, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Belfast, April typically has an average temperature of 6°C (43°F), with highs reaching up to 22°C (73°F) and lows dropping to around -5°C (23°F).

Data source: Temperature data for Belfast generated using information from the Copernicus Climate Change Service.

April Precipitation in Belfast

In Belfast in April, the precipitation amount is 131 mm (5.2 in) spread over 12 days.

April Precipitation Trends in Belfast

The chart displays monthly precipitation patterns in Belfast, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Belfast, April typically receives around 131 mm (5.2 inches) of precipitation spread over approximately 12 days.

Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

April Humidity in Belfast

In Belfast in April, humidity is 81%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill enveloping you, making every step outside seem heavier and less inviting for traveling.

April Average Humidity in Belfast

This chart illustrates the average monthly humidity levels in Belfast, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Belfast is approximately 81%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Belfast

In Belfast in April, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Belfast.

Maximum UV Index Levels in Belfast for April

The chart shows the monthly maximum UV Index (UVI) for Belfast in April, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In April, the maximum UV index in Belfast typically reaches 7, which falls under the high exposure category.

Data source: Belfast April UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How April Weather in Belfast Compares to Other Months

Weather in Belfast varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Belfast, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Belfast, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (24°F)	93 mm (3.7 inches)	88%	low
February Weather	-4°C (26°F)	88 mm (3.5 inches)	88%	moderate
March Weather	0°C (32°F)	72 mm (2.9 inches)	85%	moderate
April Weather	6°C (43°F)	131 mm (5.2 inches)	81%	high
May Weather	11°C (53°F)	90 mm (3.6 inches)	76%	very high
June Weather	17°C (63°F)	76 mm (3.0 inches)	74%	very high
July Weather	20°C (68°F)	91 mm (3.6 inches)	74%	very high
August Weather	20°C (68°F)	75 mm (3.0 inches)	74%	very high
September Weather	16°C (61°F)	77 mm (3.0 inches)	77%	high
October Weather	11°C (51°F)	130 mm (5.1 inches)	82%	moderate
November Weather	3°C (38°F)	121 mm (4.8 inches)	85%	moderate
December Weather	-2°C (28°F)	129 mm (5.1 inches)	84%	low