Free tools · Measured from space

Heat in Ward 18, Rustenburg

Summer 2024/25: the ground in Ward 18, Rustenburg reached about 44 °C on clear mornings. That is the ground (roofs, roads, soil), not the air. Only the summer of 2017/18 was hotter since 2014. In summer the ground here reads +2.1 °C against its municipality’s average (since 2014).

Land surface temperature is how hot the ground itself is: roofs, roads, bare soil and leaves, as a satellite sees them from above. Landsat passes at about 10 in the morning and sees only through clear skies. It is not the air temperature a weather station gives: on a sunny day the ground is often 10 to 20 degrees hotter than the air, and hard, dark, dry surfaces heat up most while trees, grass and water stay cooler.

What it is not: not the afternoon peak, not the night, not the air you feel in the shade, and not a reading at any one house. A month with clouds rests on few clear looks.

Summer 2024/25

43.6 °CThe ground, not the airDecember to February, clear mornings
2017/18Hottest summer since 201445.0 °C; the coolest was 2021/22, 37.6 °C
+2.1 °CAgainst its municipalityThe ward’s summers against the municipality’s average, 7 summers since 2014

Every summer since 1987

Each summer (December to February, named by the year it ends) on clear mornings. Bars start at 33 °C, not zero. Darker: Landsat 8 and 9 (from 2014); lighter: Landsat 5 and 7. A gap is a summer seen too little.

Show the numbers

Land surface temperature each summer, 1987 to 2025: every figure
When or what	Figure
Summer 1986 to 87	38.3 °C
Summer 1990 to 91	35.9 °C
Summer 1992 to 93	35.4 °C
Summer 1997 to 98	36.0 °C
Summer 2000 to 01	41.2 °C
Summer 2002 to 03	39.2 °C
Summer 2006 to 07	39.4 °C
Summer 2012 to 13	36.2 °C
Summer 2015 to 16	42.6 °C
Summer 2017 to 18	45.0 °C
Summer 2018 to 19	42.4 °C
Summer 2021 to 22	37.6 °C
Summer 2022 to 23	39.6 °C
Summer 2023 to 24	39.9 °C
Summer 2024 to 25	43.6 °C

The shape of a year

Each month’s average since 2014, clear mornings. Bars start at 18 °C.

Show the numbers

Land surface temperature by calendar month, since 2014: every figure
When or what	Figure
January	40.0 °C
February	39.1 °C
March	35.7 °C
April	29.8 °C
May	25.2 °C
June	20.7 °C
July	22.0 °C
August	26.8 °C
September	34.3 °C
October	40.2 °C
November	42.5 °C
December	43.2 °C

Month by month

Month	Land surface temperature	Clear looks
October 2026	42.5 °C	3.0
September 2026	33.9 °C	1.2
August 2026	27.3 °C	2.0
July 2026	21.1 °C	2.5
June 2026	22.1 °C	1.3
May 2026	23.6 °C	1.9
April 2026	35.4 °C	0.9
March 2026	38.4 °C	0.8
February 2026	37.1 °C	1.0
January 2026	Seen too little	0.0
December 2025	Seen too little	0.1
November 2025	40.0 °C	2.3
October 2025	34.3 °C	0.9
September 2025	32.6 °C	2.3
August 2025	26.1 °C	2.8
July 2025	21.6 °C	1.7
June 2025	19.8 °C	2.4
May 2025	21.7 °C	2.3
April 2025	26.1 °C	0.6
March 2025	36.8 °C	1.7
February 2025	38.5 °C	0.5
January 2025	42.0 °C	0.4
December 2024	50.3 °C	1.7
November 2024	43.2 °C	2.1

“Clear looks” is how many times the average 240 m patch of the place was seen through clear sky that month. Under one, part of the place was not seen at all, so the figure leans on the part that was.

Rustenburg and its wards · Every municipality, ranked

Source

Measured from space by the American Landsat satellites: the ground, not the air.

How we worked this out

Landsat 5 to 2011, Landsat 7 to bridge the gaps, Landsat 8 and 9 from 2013: different satellites pass at slightly different times, so compare summers within the same years first.

What we changed: we kept only the clear land cells (no cloud, cloud shadow, snow or water, with a margin round each cloud), read them at 480 m, and averaged them over each 2026 ward each month; larger places are the sums of their wards.

Landsat imagery courtesy of the U.S. Geological Survey (Landsat Collection 2 surface temperature, through Digital Earth Africa’s copy).

Dataset: land surface temperature by ward, release of 13 November 2026.