Unmapped Dataworks

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Heat in Vhembe

Summer 2025/26: the ground in Vhembe reached about 36 °C on clear mornings. That is the ground (roofs, roads, soil), not the air. The coolest summer 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

Every summer since 1987

Summer 1986 to 87: 38.0 °CSummer 1990 to 91: 36.1 °CSummer 1992 to 93: 35.5 °CSummer 1994 to 95: 39.0 °CSummer 1997 to 98: 40.9 °CSummer 2001 to 02: 39.6 °CSummer 2002 to 03: 41.8 °CSummer 2006 to 07: 41.9 °CSummer 2012 to 13: 39.9 °CSummer 2014 to 15: 42.3 °CSummer 2015 to 16: 44.8 °CSummer 2017 to 18: 46.3 °CSummer 2018 to 19: 39.9 °CSummer 2019 to 20: 42.6 °CSummer 2020 to 21: 37.8 °CSummer 2021 to 22: 39.2 °CSummer 2022 to 23: 39.7 °CSummer 2023 to 24: 39.1 °CSummer 2024 to 25: 39.8 °CSummer 2025 to 26: 36.3 °C199019952000200520102015202020252026
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 2026: every figure
When or whatFigure
Summer 1986 to 8738.0 °C
Summer 1990 to 9136.1 °C
Summer 1992 to 9335.5 °C
Summer 1994 to 9539.0 °C
Summer 1997 to 9840.9 °C
Summer 2001 to 0239.6 °C
Summer 2002 to 0341.8 °C
Summer 2006 to 0741.9 °C
Summer 2012 to 1339.9 °C
Summer 2014 to 1542.3 °C
Summer 2015 to 1644.8 °C
Summer 2017 to 1846.3 °C
Summer 2018 to 1939.9 °C
Summer 2019 to 2042.6 °C
Summer 2020 to 2137.8 °C
Summer 2021 to 2239.2 °C
Summer 2022 to 2339.7 °C
Summer 2023 to 2439.1 °C
Summer 2024 to 2539.8 °C
Summer 2025 to 2636.3 °C

The shape of a year

January: 39.0 °CFebruary: 38.0 °CMarch: 36.3 °CApril: 32.9 °CMay: 29.1 °CJune: 26.1 °CJuly: 26.6 °CAugust: 31.7 °CSeptember: 38.3 °COctober: 44.7 °CNovember: 45.9 °CDecember: 44.5 °CJanFebMarAprMayJunJulAugSepOctNovDec
Each month’s average since 2014, clear mornings. Bars start at 24 °C.
Show the numbers
Land surface temperature by calendar month, since 2014: every figure
When or whatFigure
January39.0 °C
February38.0 °C
March36.3 °C
April32.9 °C
May29.1 °C
June26.1 °C
July26.6 °C
August31.7 °C
September38.3 °C
October44.7 °C
November45.9 °C
December44.5 °C

Month by month

MonthLand surface temperatureClear looks
October 202641.8 °C1.9
September 202634.4 °C1.0
August 202629.2 °C3.0
July 202625.2 °C2.1
June 202625.2 °C1.7
May 202627.8 °C2.3
April 2026Seen too little0.2
March 2026Seen too little0.2
February 202637.6 °C1.1
January 202628.8 °C0.5
December 202542.4 °C1.5
November 202539.9 °C1.5
October 202542.4 °C2.2
September 202538.5 °C2.4
August 202529.6 °C2.5
July 202526.1 °C3.1
June 202526.3 °C1.9
May 202527.7 °C2.0
April 202532.3 °C1.9
March 202535.4 °C0.4
February 202536.3 °C0.7
January 202536.2 °C0.9
December 202447.0 °C1.6
November 202447.9 °C1.6

“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.

Every municipality, ranked · Everything we hold for Vhembe

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.

Unmapped Dataworks