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Climate & Weather Averages in Johannesburg, South Africa

Currently: 12 °C. Passing clouds. (Weather station: O.R. Tambo International Airport, South Africa). See more current weather

Annual Weather Averages Near Johannesburg

Averages are for O.R. Tambo International Airport, which is 21 kilometers from Johannesburg.

Based on weather reports collected during 1992–2021.

All Year Climate & Weather Averages in Johannesburg

High Temp: 26 °C

Low Temp: 4 °C

Mean Temp: 17 °C

Precipitation: 65.8 mm

Humidity: 58%

Dew Point: 7 °C

Wind: 25 km/h

Pressure: 101.99 kPa

Visibility: 16 km

January Climate & Weather Averages in Johannesburg

High Temp: 26 °C

Low Temp: 15 °C

Mean Temp: 21 °C

Precipitation: 141.0 mm

Humidity: 70%

Dew Point: 14 °C

Wind: 25 km/h

Pressure: 101.58 kPa

Visibility: 17 km

February Climate & Weather Averages in Johannesburg

High Temp: 26 °C

Low Temp: 15 °C

Mean Temp: 20 °C

Precipitation: 121.5 mm

Humidity: 70%

Dew Point: 13 °C

Wind: 23 km/h

Pressure: 101.65 kPa

Visibility: 16 km

March Climate & Weather Averages in Johannesburg

High Temp: 25 °C

Low Temp: 13 °C

Mean Temp: 19 °C

Precipitation: 96.4 mm

Humidity: 68%

Dew Point: 12 °C

Wind: 22 km/h

Pressure: 101.80 kPa

Visibility: 16 km

April Climate & Weather Averages in Johannesburg

High Temp: 23 °C

Low Temp: 11 °C

Mean Temp: 17 °C

Precipitation: 44.8 mm

Humidity: 63%

Dew Point: 8 °C

Wind: 22 km/h

Pressure: 102.04 kPa

Visibility: 16 km

May Climate & Weather Averages in Johannesburg

High Temp: 21 °C

Low Temp: 7 °C

Mean Temp: 14 °C

Precipitation: 23.6 mm

Humidity: 52%

Dew Point: 3 °C

Wind: 22 km/h

Pressure: 102.25 kPa

Visibility: 16 km

June Climate & Weather Averages in Johannesburg

High Temp: 18 °C

Low Temp: 4 °C

Mean Temp: 11 °C

Precipitation: 8.2 mm

Humidity: 49%

Dew Point: -1 °C

Wind: 22 km/h

Pressure: 102.49 kPa

Visibility: 15 km

July Climate & Weather Averages in Johannesburg

High Temp: 18 °C

Low Temp: 4 °C

Mean Temp: 11 °C

Precipitation: 3.8 mm

Humidity: 47%

Dew Point: -2 °C

Wind: 23 km/h

Pressure: 102.59 kPa

Visibility: 15 km

August Climate & Weather Averages in Johannesburg

High Temp: 21 °C

Low Temp: 6 °C

Mean Temp: 14 °C

Precipitation: 12.8 mm

Humidity: 44%

Dew Point: -1 °C

Wind: 27 km/h

Pressure: 102.30 kPa

Visibility: 15 km

September Climate & Weather Averages in Johannesburg

High Temp: 25 °C

Low Temp: 10 °C

Mean Temp: 17 °C

Precipitation: 21.8 mm

Humidity: 42%

Dew Point: 2 °C

Wind: 29 km/h

Pressure: 102.03 kPa

Visibility: 16 km

October Climate & Weather Averages in Johannesburg

High Temp: 26 °C

Low Temp: 12 °C

Mean Temp: 19 °C

Precipitation: 71.3 mm

Humidity: 54%

Dew Point: 7 °C

Wind: 30 km/h

Pressure: 101.84 kPa

Visibility: 17 km

November Climate & Weather Averages in Johannesburg

High Temp: 26 °C

Low Temp: 13 °C

Mean Temp: 20 °C

Precipitation: 101.8 mm

Humidity: 63%

Dew Point: 11 °C

Wind: 30 km/h

Pressure: 101.66 kPa

Visibility: 17 km

December Climate & Weather Averages in Johannesburg

High Temp: 26 °C

Low Temp: 14 °C

Mean Temp: 20 °C

Precipitation: 142.7 mm

Humidity: 69%

Dew Point: 13 °C

Wind: 28 km/h

Pressure: 101.62 kPa

Visibility: 17 km

Quick Climate Info

Hottest Month January (21 °C avg)
Coldest Month July (11 °C avg)
Wettest Month December (142.7 mm avg)
Windiest Month October (30 km/h avg)
Annual precip. 789.8 mm (per year)

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