May Weather in Newcastle, South Africa

Last updated: August 31, 2025

In May, the average temperature in Newcastle, South Africa hovers around 14°C (58°F). Expect a range between a chilly 0°C (32°F) and a warm 30°C (86°F). With an average humidity of 82%, you'll likely feel the moisture in the air. Don't forget your umbrella, as 28 mm (1.1 in) of precipitation is anticipated over about 3 days!

May Temperature in Newcastle

In May in Newcastle, the average temperature is 14°C (58°F). The maximum can reach 30°C (86°F), while the minimum can drop to as low as 0°C (32°F). This variation makes it essential for travelers to pack layers to stay comfortable throughout the day.

May Weather in Newcastle: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Newcastle, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Newcastle, May typically has an average temperature of 14°C (58°F), with highs reaching up to 30°C (86°F) and lows dropping to around 0°C (32°F).

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

May Precipitation in Newcastle

In Newcastle in May, the precipitation amount is 28 mm (1.1 in) over the course of 3 days.

May Precipitation Trends in Newcastle

The chart displays monthly precipitation patterns in Newcastle, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Newcastle, May typically receives around 28 mm (1.1 inches) of precipitation spread over approximately 3 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

May Humidity in Newcastle

In Newcastle in May, humidity is 82%. With an average temperature of 14°C (58°F), this humidity feels like a heavy blanket wrapping around you, making travel uncomfortable and sticky.

May Average Humidity in Newcastle

This chart illustrates the average monthly humidity levels in Newcastle, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Newcastle is approximately 82%, offering insight into how humid the weather typically is during this month.

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

May UV Index in Newcastle

In Newcastle in May, 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 Newcastle.

Maximum UV Index Levels in Newcastle for May

The chart shows the monthly maximum UV Index (UVI) for Newcastle in May, 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 May, the maximum UV index in Newcastle typically reaches 7, which falls under the high exposure category.

Data source: Newcastle May 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 May Weather in Newcastle Compares to Other Months

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

This table compares monthly weather conditions in Newcastle, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	21°C (70°F)	117 mm (4.6 inches)	79%	extreme
February Weather	21°C (70°F)	136 mm (5.3 inches)	77%	extreme
March Weather	20°C (69°F)	101 mm (4.0 inches)	77%	extreme
April Weather	17°C (63°F)	68 mm (2.7 inches)	81%	very high
May Weather	14°C (58°F)	28 mm (1.1 inches)	82%	high
June Weather	12°C (53°F)	9 mm (0.4 inches)	73%	moderate
July Weather	12°C (54°F)	3 mm (0.1 inches)	71%	high
August Weather	15°C (59°F)	22 mm (0.9 inches)	68%	very high
September Weather	18°C (64°F)	38 mm (1.5 inches)	74%	extreme
October Weather	18°C (66°F)	76 mm (3.0 inches)	74%	extreme
November Weather	20°C (68°F)	106 mm (4.2 inches)	82%	extreme
December Weather	21°C (70°F)	161 mm (6.3 inches)	81%	extreme