Unmapped Dataworks

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Heat in Ward 8, Greater Tzaneen

Summer 2025/26: the ground in Ward 8, Greater Tzaneen reached about 35 °C on clear mornings. That is the ground (roofs, roads, soil), not the air. The 4th hottest of 7 summers since 2014. In summer the ground here reads −0.7 °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

Every summer since 1995

Summer 1994 to 95: 31.2 °CSummer 2001 to 02: 33.2 °CSummer 2002 to 03: 40.6 °CSummer 2017 to 18: 33.3 °CSummer 2018 to 19: 31.1 °CSummer 2019 to 20: 35.4 °CSummer 2021 to 22: 28.1 °CSummer 2022 to 23: 35.8 °CSummer 2024 to 25: 37.0 °CSummer 2025 to 26: 34.6 °C19952000200520102015202020252026
Each summer (December to February, named by the year it ends) on clear mornings. Bars start at 26 °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, 1995 to 2026: every figure
When or whatFigure
Summer 1994 to 9531.2 °C
Summer 2001 to 0233.2 °C
Summer 2002 to 0340.6 °C
Summer 2017 to 1833.3 °C
Summer 2018 to 1931.1 °C
Summer 2019 to 2035.4 °C
Summer 2021 to 2228.1 °C
Summer 2022 to 2335.8 °C
Summer 2024 to 2537.0 °C
Summer 2025 to 2634.6 °C

The shape of a year

January: 31.9 °CFebruary: 32.8 °CMarch: 28.5 °CApril: 28.0 °CMay: 24.6 °CJune: 22.0 °CJuly: 21.5 °CAugust: 26.7 °CSeptember: 33.6 °COctober: 39.1 °CNovember: 38.3 °CDecember: 36.4 °CJanFebMarAprMayJunJulAugSepOctNovDec
Each month’s average since 2014, clear mornings. Bars start at 19 °C.
Show the numbers
Land surface temperature by calendar month, since 2014: every figure
When or whatFigure
January31.9 °C
February32.8 °C
March28.5 °C
April28.0 °C
May24.6 °C
June22.0 °C
July21.5 °C
August26.7 °C
September33.6 °C
October39.1 °C
November38.3 °C
December36.4 °C

Month by month

MonthLand surface temperatureClear looks
October 202638.0 °C5.1
September 202628.7 °C2.0
August 202626.4 °C6.0
July 202621.1 °C3.5
June 202622.2 °C4.0
May 202624.0 °C6.7
April 2026Seen too little0.2
March 2026Seen too little0.1
February 202633.9 °C2.3
January 2026Seen too little0.2
December 202535.3 °C4.5
November 202528.4 °C3.7
October 202536.7 °C3.9
September 202531.8 °C3.9
August 202524.4 °C5.8
July 202521.7 °C6.0
June 202522.6 °C4.0
May 202522.9 °C2.2
April 202527.5 °C6.0
March 2025Seen too little0.1
February 202533.2 °C1.9
January 202536.1 °C2.1
December 202441.6 °C2.5
November 202445.3 °C2.3

“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.

Greater Tzaneen 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.

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