Free tools · Measured from space

Heat in Ward 20, Sol Plaatje

Summer 2025/26: the ground in Ward 20, Sol Plaatje reached about 41 °C on clear mornings. That is the ground (roofs, roads, soil), not the air. The 9th hottest of 13 summers since 2014. In summer the ground here reads −0.9 °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 2025/26

41.1 °CThe ground, not the airDecember to February, clear mornings
2015/16Hottest summer since 201446.7 °C; the coolest was 2021/22, 37.0 °C
−0.9 °CAgainst its municipalityThe ward’s summers against the municipality’s average, 13 summers since 2014

Every summer since 1987

Each summer (December to February, named by the year it ends) on clear mornings. Bars start at 35 °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 2026: every figure
When or what	Figure
Summer 1986 to 87	39.8 °C
Summer 1992 to 93	41.0 °C
Summer 1993 to 94	38.0 °C
Summer 1996 to 97	40.1 °C
Summer 1997 to 98	37.6 °C
Summer 1998 to 99	38.9 °C
Summer 2000 to 01	37.9 °C
Summer 2001 to 02	40.9 °C
Summer 2002 to 03	37.3 °C
Summer 2012 to 13	38.6 °C
Summer 2013 to 14	43.1 °C
Summer 2014 to 15	37.1 °C
Summer 2015 to 16	46.7 °C
Summer 2016 to 17	41.6 °C
Summer 2017 to 18	43.6 °C
Summer 2018 to 19	41.7 °C
Summer 2019 to 20	44.6 °C
Summer 2020 to 21	41.0 °C
Summer 2021 to 22	37.0 °C
Summer 2022 to 23	40.7 °C
Summer 2023 to 24	41.5 °C
Summer 2024 to 25	43.9 °C
Summer 2025 to 26	41.1 °C

The shape of a year

Each month’s average since 2014, clear mornings. Bars start at 15 °C.

Show the numbers

Land surface temperature by calendar month, since 2014: every figure
When or what	Figure
January	42.6 °C
February	38.1 °C
March	35.5 °C
April	28.2 °C
May	22.2 °C
June	17.2 °C
July	17.5 °C
August	21.9 °C
September	31.8 °C
October	39.9 °C
November	44.2 °C
December	45.2 °C

Month by month

Month	Land surface temperature	Clear looks
October 2026	39.7 °C	2.8
September 2026	29.8 °C	1.6
August 2026	24.5 °C	2.0
July 2026	19.1 °C	1.8
June 2026	17.4 °C	1.1
May 2026	21.5 °C	1.7
April 2026	31.7 °C	1.1
March 2026	34.5 °C	1.5
February 2026	35.3 °C	0.9
January 2026	46.4 °C	3.6
December 2025	41.8 °C	1.7
November 2025	43.5 °C	2.4
October 2025	36.9 °C	1.5
September 2025	30.8 °C	2.9
August 2025	21.4 °C	1.8
July 2025	18.1 °C	1.9
June 2025	16.7 °C	2.1
May 2025	20.3 °C	1.9
April 2025	27.5 °C	2.0
March 2025	Seen too little	0.2
February 2025	41.5 °C	1.0
January 2025	42.9 °C	3.1
December 2024	47.2 °C	2.3
November 2024	45.1 °C	2.7

“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.

Sol Plaatje 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.