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 23.3 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 20.9 °C by the end of May.
Johannesburg experiences moderate rainfall in May, with an average of 10 rainy days and a total precipitation of 42.9 mm.
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Temperatures
Rain 🌧️
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21
Dry days
10
Rainy days
0
Snow days
21°/11°
Temperatures
13 km/h
Avg max wind
38 %
Avg humidity
Johannesburg in May average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  22° | 2 23° | 3 24° | 4 23° | |||
| 5 24° | 6 24° | 7 23° | 8  20° | 9 21° | 10 23° | 11 24° |
| 12 24° | 13 23° | 14 22° | 15 22° | 16 21° | 17 21° | 18 21° |
| 19 21° | 20 21° | 21 19° | 22  19° | 23 19° | 24 22° | 25 22° |
| 26 22° | 27 22° | 28 21° | 29 21° | 30 20° | 31 18° |
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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 | Sunny | 22° /12° | 0 mm | 6 | |
| 2 May | Sunny | 23° /12° | 1.6 mm | 7 | |
| 3 May | Sunny | 24° /12° | 0.5 mm | 7 | |
| 4 May | Sunny | 23° /12° | 4.1 mm | 7 | |
| 5 May | Sunny | 24° /12° | 0.6 mm | 7 | |
| 6 May | Sunny | 24° /12° | 0 mm | 7 | |
| 7 May | Sunny | 23° /13° | 3.2 mm | 7 | |
| 8 May | Moderate or heavy rain shower | 20° /12° | 10.4 mm | 6 | |
| 9 May | Sunny | 21° /10° | 0 mm | 6 | |
| 10 May | Sunny | 23° /11° | 0 mm | 7 | |
| 11 May | Sunny | 24° /11° | 0 mm | 7 | |
| 12 May | Sunny | 24° /12° | 0 mm | 7 | |
| 13 May | Sunny | 23° /11° | 0.2 mm | 6 | |
| 14 May | Sunny | 22° /13° | 3.7 mm | 6 | |
| 15 May | Sunny | 22° /11° | 7.5 mm | 6 | |
| 16 May | Sunny | 21° /11° | 1.9 mm | 6 | |
| 17 May | Sunny | 21° /11° | 0.6 mm | 7 | |
| 18 May | Sunny | 21° /11° | 1.5 mm | 6 | |
| 19 May | Sunny | 21° /11° | 0 mm | 6 | |
| 20 May | Sunny | 21° /9° | 1.9 mm | 6 | |
| 21 May | Sunny | 19° /10° | 3.8 mm | 6 | |
| 22 May | Partly cloudy | 19° /8° | 0.2 mm | 6 | |
| 23 May | Sunny | 19° /9° | 0 mm | 6 | |
| 24 May | Sunny | 22° /9° | 0 mm | 7 | |
| 25 May | Sunny | 22° /9° | 0 mm | 7 | |
| 26 May | Sunny | 22° /10° | 0 mm | 7 | |
| 27 May | Sunny | 22° /10° | 0 mm | 7 | |
| 28 May | Sunny | 21° /10° | 0 mm | 7 | |
| 29 May | Sunny | 21° /10° | 0 mm | 7 | |
| 30 May | Sunny | 20° /9° | 0.3 mm | 6 | |
| 31 May | Sunny | 18° /8° | 0.9 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 21° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Johannesburg during May?
In May, Johannesburg can expect light to moderate rainfall, totaling 42.9 mm across approximately 10 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Johannesburg during May?
The average wind speed in Johannesburg during May is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Johannesburg
Explore the daily rainfall trends and prepare for Johannesburgs May weather 💧
UV exposure in Johannesburg during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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