Weather in Gauteng

Calculated from weather data of OR Tambo International Airport (FAOR) between 2020 and 2024.

Maximum temperatures (°C)

Month	Average	2024	2023	2022	2021	2020
January	25.5	25.6	26.3	24.1	24.6	25.3
February	24.8	27.6	24.0	25.5	23.8	25.0
March	24.5	27.1	24.5	23.0	24.1	23.1
April	21.5		23.1	19.3	23.3	20.3
May	19.5		19.3	18.8	19.6	19.6
June	17.3		18.1	16.1	17.0	16.0
July	17.2		16.3	17.5	15.6	17.3
August	20.2		20.3	19.6	19.6	19.0
September	24.5		24.5	25.1	24.5	23.5
October	25.0		24.6	26.6	23.0	25.3
November	25.2		26.0	22.8	25.3	24.3
December	25.0		25.8	24.3	23.5	24.8
Average	23.0	26.8	22.7	21.8	22.0	21.9

20th highest temperature of South Africa

Average highest temperature per day

The maximum temperature is typically observed some hours after noon.

Minimum temperatures (°C)

Month	Average	2024	2023	2022	2021	2020
January	15.1	15	15	14	16	16
February	15.1	16	15	15	15	15
March	14.2	16	14	14	14	13
April	11.5		12	10	12	11
May	8.8		10	8	8	8
June	5.9		7	4	6	5
July	5.5		6	7	4	4
August	7.5		7	8	7	6
September	11.0		12	12	11	10
October	12.4		12	14	11	14
November	13.8		15	14	14	15
December	14.9		15	15	14	16
Average	11.8	15.7	11.5	11.0	10.9	10.9

8th lowest temperature of South Africa

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Cold and hot days

Number of days	2024	2023	2022	2021	2020
30 °C or warmer	9	11	3	2	8
25 °C or warmer	64	122	72	87	85
20 °C or warmer	89	247	218	241	236
0 °C or colder	0	1	1	7	6

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	4.8	3	1	6	10	5
February	6.4	1	11	2	7	5
March	3.5	1	3	5	4	5
April	4.1		1	14	1	5
May	2.0		2	2	0	0
June	0.3		0	1	0	1
July	0.3		1	0	0	0
August	0.3		0	1	2	0
September	0.6		1	0	1	1
October	2.9		6	1	3	2
November	3.8		2	7	4	7
December	7.7		6	8	9	4
Average	3.1	1.6	2.9	3.7	3.6	3.0

Precipitation during daylight period

Percentage of observations with observed rain, drizzle, snow or hail. Only observations between sunrise and sunset are taken into account.

Wind speed (km/h)

Month	Average	2024	2023	2022	2021	2020
January	15.8	15	14	16	17	16
February	15.0	17	14	15	14	15
March	14.8	16	16	13	15	14
April	14.5		15	16	13	15
May	14.0		17	15	13	13
June	14.6		17	16	15	13
July	15.2		18	13	15	16
August	18.5		17	18	19	19
September	18.2		20	17	18	18
October	18.4		19	18	19	19
November	18.9		18	18	22	18
December	18.2		18	17	19	18
Average	16.3	15.8	16.8	16.0	16.8	16.1

5th highest wind speed of South Africa

Average wind speed

Excluding wind gusts. Only observations between sunrise and sunset are taken into account.

Prevailing wind direction

Month	2024	2023	2022	2021	2020
January	NW	NE	NE	NE	N
February	NW	NE	NE	E	NE
March	N	N	N	NW	NW
April		NW	NW	W	NW
May		NW	W	W	SW
June		W	NE	W	SW
July		NW	NW	W	SW
August		NW	NW	NW	NW
September		NW	NW	N	N
October		N	NW	N	N
November		N	NW	NW	NW
December		N	NW	N	N

Prevailing wind direction

Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.

Gauteng weather Q&A

What is the warmest month in Gauteng?

The warmest month is January with an average temperature of 26 °C over the past years.

What is the coldest month in Gauteng?

The coldest month is July with an average daytime temperature of 17 °C in the past few years.

Which month is the wettest in Gauteng?

Chance of precipitation is the highest in December with a probability of around 7.8 %.

Which month is the driest in Gauteng?

The least rainfall and snow can be expected in August. The probability is about 0.3 %.