April Weather in Koster, South Africa

Last updated: August 31, 2025

In April, the average temperature in Koster, South Africa hovers around 18°C (65°F), bringing a pleasant climate to the area. However, temperatures can vary significantly, with minimums dipping to 8°C (46°F) and maximums soaring up to 31°C (89°F). Expect an average precipitation of 43 mm (1.7 in) over approximately 7 days, contributing to an average humidity of 61%. Keep this in mind while planning your activities!

April Temperature in Koster

In April in Koster, the average temperature is 18°C (65°F). Maximum temperatures can reach 31°C (89°F), while minimums can drop as low as 8°C (46°F). This comfortable range makes it an ideal time for travelers looking to explore the area.

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

The chart illustrates April temperature patterns in Koster, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Koster, April typically has an average temperature of 18°C (65°F), with highs reaching up to 31°C (89°F) and lows dropping to around 8°C (46°F).

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

April Precipitation in Koster

In Koster in April, the total precipitation amount is 43 mm (1.7 in) spread over a period of 7 days.

April Precipitation Trends in Koster

The chart displays monthly precipitation patterns in Koster, 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 Koster, April typically receives around 43 mm (1.7 inches) of precipitation spread over approximately 7 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 Koster

In Koster in April humidity is 61%. With an average temperature of 18°C (65°F), this humidity feels like a warm blanket enveloping you, making your travels feel more comfortable yet slightly muggy, as you wander through the streets, perhaps seeking shade or a cool drink to help refresh you.

April Average Humidity in Koster

This chart illustrates the average monthly humidity levels in Koster, 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 Koster is approximately 61%, 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 Koster

In Koster 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 Koster.

Maximum UV Index Levels in Koster for April

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

Data source: Koster 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 Koster Compares to Other Months

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

This table compares monthly weather conditions in Koster, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	23°C (74°F)	106 mm (4.2 inches)	66%	extreme
February Weather	22°C (72°F)	128 mm (5.0 inches)	66%	extreme
March Weather	21°C (70°F)	53 mm (2.1 inches)	67%	extreme
April Weather	18°C (65°F)	43 mm (1.7 inches)	61%	extreme
May Weather	15°C (59°F)	9 mm (0.4 inches)	56%	high
June Weather	12°C (55°F)	5 mm (0.2 inches)	56%	high
July Weather	12°C (54°F)	2 mm (0.1 inches)	55%	high
August Weather	16°C (61°F)	1 mm (0.1 inches)	45%	very high
September Weather	20°C (68°F)	5 mm (0.2 inches)	49%	extreme
October Weather	21°C (71°F)	47 mm (1.9 inches)	47%	extreme
November Weather	23°C (73°F)	67 mm (2.7 inches)	53%	extreme
December Weather	23°C (73°F)	120 mm (4.7 inches)	64%	extreme