11-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Rain showers
18°
Feels like 18°
Wind↑ NNE 6 km/h
Humidity 66 %
💧 4.0 mm
Evening
Clear sky
22°
Feels like 24°
Wind↑ NW 4 km/h
Humidity 47 %
💧 0.1 mm
12-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Mainly clear
24°
Feels like 26°
Wind↑ NNW 16 km/h
Gusts27 km/h
Humidity 43 %
Evening
Mainly clear
27°
Feels like 28°
Wind↑ NW 14 km/h
Gusts30 km/h
Humidity 33 %
13-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Clear sky
26°
Feels like 26°
Wind↑ WSW 3 km/h
Humidity 16 %
Evening
Clear sky
28°
Feels like 28°
Wind↑ SW 7 km/h
Gusts25 km/h
Humidity 18 %
14-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Clear sky
26°
Feels like 26°
Wind↑ NNE 2 km/h
Humidity 23 %
Johannesburg forecast in charts · next 7 days
The week ahead: highs and lows
▲ This week runs +3.7° warmer than usual
Highs Lows Usual for the season (1991–2020 average)
Hourly detail
Temperature (°C) Rain (mm) Wind (km/h)
Johannesburg climate: what a normal year looks like
Day and night differ most in June: 19 °C in the afternoon against 3 °C before dawn, a 16 °C swing.
The wet season is concentrated from December to February, which brings 50% of the annual total; December by itself averages 140 mm.
The hottest stretch is January, when afternoons average 26 °C; the coldest is July, when nights average 3 °C.
Forecast highs for the coming week average 30 °C, 4 °C warmer than a normal October (26 °C).
30-year averages (1991–2020)
Month
Typical high
Typical low
Rainfall
Jan
26 °C
16 °C
133 mm
Feb
26 °C
16 °C
112 mm
Mar
24 °C
14 °C
92 mm
Apr
23 °C
11 °C
47 mm
May
21 °C
7 °C
17 mm
Jun
19 °C
3 °C
8 mm
Jul
18 °C
3 °C
4 mm
Aug
21 °C
7 °C
10 mm
Sep
25 °C
11 °C
24 mm
Oct
26 °C
13 °C
77 mm
Nov
26 °C
14 °C
102 mm
Dec
26 °C
15 °C
140 mm
Whole year
23 °C
11 °C
760 mm
Source: our own processing of the ERA5 reanalysis (Copernicus/ECMWF) for 26.20° S, 28.04° E, 1991–2020. ERA5 averages over a 0.25° grid (about 25 km): hills, a coastline or the heat of the city itself can shift local values by a degree or two.
Air you breathe in Johannesburg: pollution and pollen
5/6
Very poor
European Air Quality Index (EAQI), from Copernicus CAMS
PM2.550µg/m³
PM1051µg/m³
Copernicus CAMS model, updated several times a day.
Rain radar around Johannesburg
Rain observed over the last two hours by official weather radars around Johannesburg, followed by the radar forecast for the next hour where the weather service provides one.
Rain radarLast two hours, then forecast where available · drag the timeline
No open weather radar covers Johannesburg yet: the map shows our hour-by-hour rain forecast (ICON, GFS).
Moon over Johannesburg
Waning gibbous
87 % illuminated · 18.3 days
Rise 06:04 Set 16:40
Fri30/1079%
Sat31/1069%
Sun1/1159%
Mon2/1149%Last quarter
Tue3/1138%
Wed4/1128%
Thu5/1119%
Fri6/1112%
Sat7/116%
Sun8/112%
Mon9/110%
Tue10/111%New moon
Moonrise and moonset in local time (Africa/Johannesburg); phase and lit fraction from a synodic calculation.
Look up a past day in Johannesburg
Curious about the weather in Johannesburg on a given day? Choose a date: we read it from the ERA5 reanalysis (ECMWF / Copernicus C3S), which runs until about a week ago.
Johannesburg weather at a glance
This page gathers everything about the weather in Johannesburg, Gauteng: conditions now, the forecast for each part of the day and the trend for the coming week. At the moment the sky is “clear sky”, it is 21 °C (feels like 22 °C) and the wind blows at 7 km/h.
Expected range today: 19 °C to 30 °C and a dry sky; keep an eye on thunderstorms. The forecast comes from the AtmoAtlas engine, which combines ECMWF-AIFS, NOAA GFS and DWD ICON, adjusts cloud cover with METAR reports and uses convective energy (CAPE) to flag storms.
Use the Johannesburg forecast in your own website or app: one JSON call returns weather, air quality, tides and sun and moon times. The free key needs no card.
