April Weather in Heathrow, United States

Last updated: June 24, 2025

In April, the average temperature in Heathrow, United States hovers around 22°C (72°F), offering a pleasant climate for outdoor activities. Expect minimum temperatures to dip to 7°C (45°F), while peaks can soar to 34°C (94°F). With an average precipitation amount of 75 mm (3.0 in) spread over 7 days, it's wise to be prepared for occasional rain. The overall average humidity sits at a comfortable 70%, making for a relatively refreshing atmosphere.

April Temperature in Heathrow

In April in Heathrow, the average temperature is 22°C (72°F). The maximum can reach 34°C (94°F) and the minimum can be as low as 7°C (45°F). This diverse temperature range makes it a great time for travelers to enjoy a mix of warm and cooler experiences.

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

The chart illustrates April temperature patterns in Heathrow, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Heathrow, April typically has an average temperature of 22°C (72°F), with highs reaching up to 34°C (94°F) and lows dropping to around 7°C (45°F).

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

April Precipitation in Heathrow

In Heathrow in April, the precipitation amount is 75 mm (3.0 in) over a span of 7 days.

April Precipitation Trends in Heathrow

The chart displays monthly precipitation patterns in Heathrow, 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 Heathrow, April typically receives around 75 mm (3.0 inches) of precipitation spread over approximately 7 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

April Humidity in Heathrow

In Heathrow in April, humidity is 70%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, making travel slightly uncomfortable but still bearable; the air is thick and can leave you feeling sticky, so staying hydrated and taking frequent breaks is essential for enjoying your adventures.

April Average Humidity in Heathrow

This chart illustrates the average monthly humidity levels in Heathrow, 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 Heathrow is approximately 70%, 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 Heathrow

In Heathrow in April, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Heathrow.

Maximum UV Index Levels in Heathrow for April

The chart shows the monthly maximum UV Index (UVI) for Heathrow 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 Heathrow typically reaches 11, which falls under the extreme exposure category.

Data source: Heathrow 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 Heathrow Compares to Other Months

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

This table compares monthly weather conditions in Heathrow, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	16°C (61°F)	37 mm (1.5 inches)	83%	moderate
February Weather	19°C (66°F)	56 mm (2.2 inches)	80%	very high
March Weather	20°C (68°F)	25 mm (1.0 inches)	75%	very high
April Weather	22°C (72°F)	75 mm (3.0 inches)	70%	extreme
May Weather	25°C (77°F)	107 mm (4.2 inches)	68%	extreme
June Weather	27°C (81°F)	199 mm (7.9 inches)	75%	extreme
July Weather	27°C (82°F)	216 mm (8.5 inches)	79%	extreme
August Weather	28°C (82°F)	222 mm (8.7 inches)	81%	extreme
September Weather	27°C (81°F)	165 mm (6.5 inches)	83%	extreme
October Weather	25°C (77°F)	82 mm (3.2 inches)	81%	very high
November Weather	20°C (69°F)	44 mm (1.7 inches)	82%	high
December Weather	17°C (63°F)	62 mm (2.4 inches)	84%	moderate