April Weather in St Johnston, Ireland

Last updated: August 23, 2025

In April, the average temperature in St Johnston, Ireland hovers around 8°C (47°F). Expect a range where the minimum dips to -1°C (30°F) and the maximum can reach up to 21°C (70°F). During this time, 64 mm (2.5 in) of precipitation may fall across roughly 13 days, contributing to an average humidity of 84%.

April Temperature in St Johnston

In April in St Johnston, the average temperature is 8°C (47°F). Maximums can reach 21°C (70°F) and minimums can be as low as -1°C (30°F). Be prepared for a range of temperatures, making layered clothing a smart choice for your travels.

April Weather in St Johnston: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in St Johnston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In St Johnston, April typically has an average temperature of 8°C (47°F), with highs reaching up to 21°C (70°F) and lows dropping to around -1°C (30°F).

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

April Precipitation in St Johnston

In St Johnston in April, the precipitation amount is 64 mm (2.5 in) spread over 13 days.

April Precipitation Trends in St Johnston

The chart displays monthly precipitation patterns in St Johnston, 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 St Johnston, April typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 13 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 St Johnston

In St Johnston in April, humidity is 84%. With an average temperature of 8°C (47°F), this humidity feels like a damp blanket wrapping around you, making travel feel heavy and a bit lethargic, as the air thickens with moisture and each step becomes a little more cumbersome.

April Average Humidity in St Johnston

This chart illustrates the average monthly humidity levels in St Johnston, 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 St Johnston is approximately 84%, 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 St Johnston

In St Johnston in April, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in St Johnston.

Maximum UV Index Levels in St Johnston for April

The chart shows the monthly maximum UV Index (UVI) for St Johnston 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 St Johnston typically reaches 5, which falls under the moderate exposure category.

Data source: St Johnston 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 St Johnston Compares to Other Months

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

This table compares monthly weather conditions in St Johnston, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (42°F)	72 mm (2.8 inches)	84%	low
February Weather	6°C (42°F)	113 mm (4.4 inches)	84%	low
March Weather	6°C (44°F)	106 mm (4.2 inches)	83%	moderate
April Weather	8°C (47°F)	64 mm (2.5 inches)	84%	moderate
May Weather	11°C (52°F)	93 mm (3.7 inches)	83%	high
June Weather	13°C (56°F)	107 mm (4.2 inches)	83%	very high
July Weather	15°C (59°F)	99 mm (3.9 inches)	86%	very high
August Weather	15°C (58°F)	157 mm (6.2 inches)	86%	high
September Weather	13°C (55°F)	97 mm (3.8 inches)	87%	moderate
October Weather	10°C (50°F)	112 mm (4.4 inches)	87%	moderate
November Weather	7°C (46°F)	94 mm (3.7 inches)	88%	low
December Weather	6°C (43°F)	103 mm (4.1 inches)	84%	low