Johannesburg, South Africa 14-Day Forecast
South Africa 🇿🇦
66°
Overcast right now
Today: high 80°, low 62°
Updated 1 min ago
Johannesburg weather for the next 14 days
Thursday, September 17
Sunny High 81° Low 65°Precipitation
2%
· 0.0 in
Max wind
20 mph
Humidity
33%
UV index
9 - Very High
Sunrise / sunset
06:02 AM / 06:01 PM
Friday, September 18
Overcast High 73° Low 60°Precipitation
17%
· 0.0 in
Max wind
20 mph
Humidity
49%
UV index
8 - High
Sunrise / sunset
06:01 AM / 06:02 PM
Saturday, September 19
Sunny High 72° Low 57°Precipitation
37%
· 0.04 in
Max wind
21 mph
Humidity
52%
UV index
7 - High
Sunrise / sunset
06:00 AM / 06:02 PM
Sunday, September 20
Patchy rain nearby High 68° Low 57°Precipitation
80%
· 1.69 in
Max wind
21 mph
Humidity
65%
UV index
8 - High
Sunrise / sunset
05:59 AM / 06:03 PM
Monday, September 21
Light rain shower High 64° Low 56°Precipitation
78%
· 0.42 in
Max wind
13 mph
Humidity
73%
UV index
6 - High
Sunrise / sunset
05:58 AM / 06:03 PM
Tuesday, September 22
Sunny High 72° Low 55°Precipitation
17%
· 0.0 in
Max wind
11 mph
Humidity
58%
UV index
7 - High
Sunrise / sunset
05:57 AM / 06:03 PM
Wednesday, September 23
Sunny High 76° Low 62°Precipitation
17%
· 0.0 in
Max wind
9 mph
Humidity
48%
UV index
7 - High
Sunrise / sunset
05:56 AM / 06:04 PM
Thursday, September 24
Sunny High 80° Low 62°Precipitation
58%
· 0.88 in
Max wind
17 mph
Humidity
40%
UV index
8 - Very High
Sunrise / sunset
05:54 AM / 06:04 PM
Friday, September 25
Patchy rain nearby High 68° Low 57°Precipitation
84%
· 2.35 in
Max wind
19 mph
Humidity
73%
UV index
6 - High
Sunrise / sunset
05:53 AM / 06:05 PM
Saturday, September 26
Sunny High 73° Low 57°Precipitation
57%
· 0.14 in
Max wind
9 mph
Humidity
51%
UV index
7 - High
Sunrise / sunset
05:52 AM / 06:05 PM
Sunday, September 27
Patchy rain nearby High 66° Low 57°Precipitation
69%
· 0.32 in
Max wind
11 mph
Humidity
60%
UV index
6 - High
Sunrise / sunset
05:51 AM / 06:05 PM
Monday, September 28
Overcast High 70° Low 55°Precipitation
14%
· 0.0 in
Max wind
10 mph
Humidity
60%
UV index
6 - High
Sunrise / sunset
05:50 AM / 06:06 PM
Tuesday, September 29
Sunny High 74° Low 56°Precipitation
3%
· 0.0 in
Max wind
8 mph
Humidity
48%
UV index
7 - High
Sunrise / sunset
05:49 AM / 06:06 PM
Johannesburg 14-day outlook: the story
The warmest day of Johannesburg's 14-day outlook is Thursday, September 17 with a high near 81°F (27°C); the coolest night comes Monday, September 28, dipping to 55°F (13°C). Temperatures hold fairly steady from week to week. Highs over the next two weeks average 73°F (23°C), about 3°F (2°C) below the typical September high of 76°F (25°C).
Precipitation is most likely on Sunday 20, Monday 21, Thursday 24, Friday 25 and beyond; the wettest day looks like Friday, September 25 with about 2.35 in (59.6 mm) expected. For the weekend, expect Saturday 72°F (22°C) and sunny / Sunday 68°F (20°C) and patchy rain nearby.
For typical conditions month by month, see the Johannesburg climate & average temperatures guide.
Johannesburg forecast questions
Will it rain in Johannesburg this week?
The forecast currently shows meaningful precipitation chances on 6 of the next 14 days, peaking around Friday, September 25.
What will be the warmest day in Johannesburg over the next 14 days?
Thursday, September 17, with a forecast high near 81°F (27°C).
How accurate is a 14-day forecast for Johannesburg?
Days 1-3 are highly reliable, days 4-7 capture the overall pattern well, and days 8-14 indicate trends rather than exact figures - check back as the date approaches; this page refreshes throughout the day.
Average temperatures in Johannesburg by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 78° | 58° | 14 | 4.6 in | 11.6 h/day | 66% |
| February | 77° | 58° | 13 | 4.1 in | 11.0 h/day | 68% |
| March | 76° | 56° | 9 | 2.4 in | 10.7 h/day | 65% |
| April | 71° | 51° | 8 | 2.2 in | 10.1 h/day | 65% |
| May | 68° | 45° | 2 | 0.6 in | 9.8 h/day | 54% |
| June | 63° | 40° | 1 | 0.3 in | 9.8 h/day | 51% |
| July | 63° | 39° | 0 | 0.1 in | 10.2 h/day | 46% |
| August | 70° | 44° | 1 | 0.1 in | 10.6 h/day | 40% |
| September | 76° | 50° | 3 | 0.5 in | 11.2 h/day | 39% |
| October | 79° | 53° | 7 | 1.5 in | 11.1 h/day | 46% |
| November | 79° | 56° | 11 | 3.0 in | 11.5 h/day | 56% |
| December | 79° | 59° | 16 | 4.3 in | 11.3 h/day | 64% |
14-day forecasts nearby