June Weather in Newcastle, South Africa

Last updated: August 31, 2025

In Newcastle, South Africa, the average temperature in June hovers around 12°C (53°F). Temperatures can dip to a chilly -2°C (28°F) at their lowest and soar up to a warm 27°C (81°F) at their highest. Rainfall is moderate, with an average of 9 mm (0.4 in) spread over just 1 day. Expect average humidity levels to be around 73%, adding a touch of dampness to the air.

June Temperature in Newcastle

In June in Newcastle, the average temperature is 12°C (53°F). Maximums can reach 27°C (81°F), while minimums can drop to as low as -2°C (28°F). Be prepared for a range of weather conditions, making it essential to pack layers for your trip.

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

The chart illustrates June 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, June typically has an average temperature of 12°C (53°F), with highs reaching up to 27°C (81°F) and lows dropping to around -2°C (28°F).

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

June Precipitation in Newcastle

In Newcastle in June, the precipitation amount is 9 mm (0.4 in) over the course of 1 day.

June Precipitation Trends in Newcastle

The chart displays monthly precipitation patterns in Newcastle, with values for each month alongside June’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June’s conditions compare to those of other months. In Newcastle, June typically receives around 9 mm (0.4 inches) of precipitation spread over approximately 1 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

June Humidity in Newcastle

In Newcastle in June humidity is 73%. With an average temperature of 12°C (53°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities somewhat uncomfortable and requiring layers to keep warm while exploring.

June Average Humidity in Newcastle

This chart illustrates the average monthly humidity levels in Newcastle, with June’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In June, average humidity in Newcastle is approximately 73%, offering insight into how humid the weather typically is during this month.

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

June UV Index in Newcastle

In Newcastle in June, 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 Newcastle.

Maximum UV Index Levels in Newcastle for June

The chart shows the monthly maximum UV Index (UVI) for Newcastle in June, 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 June, the maximum UV index in Newcastle typically reaches 5, which falls under the moderate exposure category.

Data source: Newcastle June 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 June 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 June’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 June’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