Johannesburg
May
Weather in Johannesburg for May 2025
Your guide to Johannesburg weather in May - trends and predictions
In general, the average temperature in Johannesburg at the beginning of May is 25.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.9 °C by the end of May.
With an average of 4 rainy days, Johannesburg experiences minimal rainfall in May, ensuring that most days remain pleasantly dry.
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27
Dry days
4
Rainy days
0
Snow days
24°/10°
Temperatures
14 km/h
Avg max wind
41 %
Avg humidity
Johannesburg in May average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  25° | 2  26° | 3  26° | 4 24° | |||
| 5 26° | 6 26° | 7 24° | 8 21° | 9  22° | 10  23° | 11 25° |
| 12 24° | 13 23° | 14 21° | 15 20° | 16  20° | 17 23° | 18 23° |
| 19 21° | 20 21° | 21 22° | 22 21° | 23 20° | 24 23° | 25 22° |
| 26 21° | 27 22° | 28 21° | 29 21° | 30 20° | 31 19° |
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Temperatures trend during May in Johannesburg
See the weather trend as well as the moving average line
May weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May | Cloudy | 25° /15° | 0 mm | 7 | |
| 2 May | Moderate or heavy rain shower | 26° /15° | 3.1 mm | 7 | |
| 3 May | Patchy rain possible | 26° /15° | 0.9 mm | 7 | |
| 4 May | Moderate or heavy rain shower | 24° /14° | 8.2 mm | 6 | |
| 5 May | Moderate or heavy rain shower | 26° /14° | 1.3 mm | 7 | |
| 6 May | Patchy rain possible | 26° /14° | 0.1 mm | 7 | |
| 7 May | Moderate or heavy rain shower | 24° /14° | 6.3 mm | 7 | |
| 8 May | Moderate or heavy rain shower | 21° /13° | 15.3 mm | 6 | |
| 9 May | Partly cloudy | 22° /12° | 0 mm | 7 | |
| 10 May | Sunny | 23° /13° | 0 mm | 7 | |
| 11 May | Sunny | 25° /13° | 0 mm | 7 | |
| 12 May | Partly cloudy | 24° /14° | 0 mm | 7 | |
| 13 May | Moderate rain at times | 23° /12° | 0.5 mm | 6 | |
| 14 May | Moderate or heavy rain shower | 21° /12° | 7.3 mm | 5 | |
| 15 May | Moderate or heavy rain shower | 20° /12° | 11.5 mm | 6 | |
| 16 May | Heavy rain at times | 20° /12° | 3.7 mm | 6 | |
| 17 May | Sunny | 23° /11° | 0 mm | 7 | |
| 18 May | Moderate or heavy rain shower | 23° /12° | 3 mm | 7 | |
| 19 May | Sunny | 21° /11° | 0 mm | 6 | |
| 20 May | Sunny | 21° /9° | 0 mm | 6 | |
| 21 May | Sunny | 22° /11° | 0 mm | 7 | |
| 22 May | Partly cloudy | 21° /10° | 0 mm | 6 | |
| 23 May | Sunny | 20° /10° | 0 mm | 6 | |
| 24 May | Sunny | 23° /11° | 0 mm | 7 | |
| 25 May | Sunny | 22° /11° | 0 mm | 7 | |
| 26 May | Sunny | 21° /11° | 0 mm | 7 | |
| 27 May | Sunny | 22° /11° | 0 mm | 7 | |
| 28 May | Sunny | 21° /11° | 0 mm | 7 | |
| 29 May | Sunny | 21° /10° | 0 mm | 7 | |
| 30 May | Moderate rain at times | 20° /11° | 0.6 mm | 6 | |
| 31 May | Moderate rain at times | 19° /10° | 1.5 mm | 6 | |
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Important Notice
Our weather forecast for Johannesburg in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Johannesburg forecast closer to your planned date for the most up-to-date weather information.
Johannesburg in May - FAQ
What are the expected maximum and minimum temperatures in Johannesburg during May?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Johannesburg during May?
Significant rainfall exceeding 126.6 mm is expected in Johannesburg during May, occurring over more than 4 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Johannesburg during May?
The average wind speed in Johannesburg during May is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
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