Thembisa climate: monthly averages: annual mean temperature 17.1 C; warmest month Jan (21.6 C); coldest month Jul (9.9 C).
Annual mean temperature: 17.1 C
Warmest month: Jan (21.6 C)
Coldest month: Jul (9.9 C)
Wettest month: Dec (4.09 mm/day)
All-time record high: 38.8 C
All-time record low: -4.8 C
**Thembisa’s climate features a mild subtropical average of 17.1°C annually**, with warm summers peaking in January (21.6°C) and cool winters dipping to July’s 9.9°C. Rainfall averages 642 mm yearly, concentrated in December (4.09 mm/day). Extreme temperatures range from a record high of 38.8°C to a low of -4.8°C. The wettest month is December, with an average of 4.09 mm of rain per day. The annual mean (17.1°C) sits between the record high (38.8°C) and low (-4.8°C), reflecting moderate seasonal variation.
Annual mean temperature 17.1 C
Warmest month Jan (21.6 C)
Coldest month Jul (9.9 C)
Wettest month Dec (4.09 mm/day)
All-time record high 38.8 C
All-time record low -4.8 C
Annual precipitation 642 mm / year
Coordinates -25.99636, 28.2268
Population 511,655
Average monthly temperature and rainfall in Thembisa
Month
Mean temp (C)
Rain (mm/day)
Record high (C)
Record low (C)
Jan
21.6
3.95
38.8
7.0
Feb
21.4
2.90
35.1
8.8
Mar
19.9
2.36
33.8
6.1
Apr
16.7
1.44
31.4
1.0
May
13.3
0.51
29.3
-4.2
Jun
10.0
0.23
25.4
-4.8
Jul
9.9
0.09
25.8
-4.0
Aug
13.1
0.23
29.8
-4.2
Sep
17.3
0.53
33.4
-1.5
Oct
19.9
1.83
36.7
2.9
Nov
20.7
2.97
36.9
5.0
Dec
21.4
4.09
36.5
6.5
What the Thembisa climate table shows
Values are multi-decadal climatological averages for the -25.99636, 28.2268 grid cell, not a single year. Rain is the daily mean, so a value of 2.00 mm/day is about 60 mm across a 30-day month. Averages smooth over extremes, so use them for planning rather than for what to pack for next Tuesday.