Johannesburg Hourly Weather Forecast

Johannesburg temperature trend - Next 24 hours

The next 24 hours at a glance

Warmest hour: 4 PM - around 70°
Coolest hour: 7 AM - around 55°
Rain risk: low all day (peaks at 14%)
UV peak: 12 PM at index 8 - sun protection recommended
Windiest: 12 AM at 12 mph

Johannesburg hourly weather - Thursday, August 27

In Johannesburg, expect a high near 70°F (21°C) around 4 PM and a low of 55°F (13°C) near 7 AM, with no meaningful precipitation risk.

Time	Conditions	Temp	Feels	Rain	Wind	Humidity	UV
12 AM	Overcast	60°	52°	13%	12 mph NE	55%	0
1 AM	Overcast	60°	53°	14%	11 mph NNE	57%	0
2 AM	Overcast	59°	52°	14%	11 mph NNE	60%	0
3 AM	Partly Cloudy	58°	51°	5%	10 mph NNE	60%	0
4 AM	Clear	57°	50°	4%	10 mph NNE	59%	0
5 AM	Clear	56°	50°	4%	9 mph NNE	61%	0
6 AM	Clear	56°	50°	4%	9 mph NNE	64%	0
7 AM	Partly Cloudy	55°	50°	7%	9 mph NNE	66%	0
8 AM	Sunny	57°	50°	4%	10 mph NNE	63%	1
9 AM	Cloudy	59°	52°	10%	10 mph NNE	56%	2
10 AM	Cloudy	62°	55°	8%	9 mph N	50%	5
11 AM	Sunny	64°	57°	1%	8 mph N	45%	7
12 PM	Sunny	66°	60°	1%	8 mph N	40%	8
1 PM	Sunny	68°	62°	1%	7 mph N	37%	7
2 PM	Sunny	69°	64°	1%	6 mph N	33%	5
3 PM	Sunny	70°	64°	2%	5 mph N	31%	3
4 PM	Cloudy	70°	64°	5%	5 mph N	29%	1
5 PM	Partly Cloudy	70°	64°	4%	4 mph N	29%	0
6 PM	Partly Cloudy	69°	63°	4%	4 mph NNE	29%	0
7 PM	Partly Cloudy	68°	62°	2%	5 mph N	30%	0
8 PM	Clear	66°	60°	1%	7 mph NNW	35%	0
9 PM	Partly Cloudy	65°	59°	3%	6 mph NNW	38%	0
10 PM	Clear	64°	57°	2%	8 mph N	41%	0
11 PM	Partly Cloudy	61°	52°	3%	11 mph N	46%	0

Johannesburg hourly weather - Friday, August 28

In Johannesburg, expect a high near 71°F (22°C) around 3 PM and a low of 54°F (12°C) near 6 AM, with no meaningful precipitation risk.

Time	Conditions	Temp	Feels	Rain	Wind	Humidity	UV
12 AM	Overcast	59°	51°	11%	11 mph N	50%	0
1 AM	Clear	58°	51°	3%	10 mph N	53%	0
2 AM	Clear	57°	50°	4%	9 mph N	55%	0
3 AM	Partly Cloudy	56°	50°	6%	9 mph N	58%	0
4 AM	Partly Cloudy	56°	50°	6%	9 mph N	60%	0
5 AM	Clear	55°	49°	4%	9 mph N	62%	0
6 AM	Clear	54°	50°	6%	7 mph N	64%	0
7 AM	Sunny	54°	51°	5%	6 mph N	64%	0
8 AM	Sunny	56°	52°	4%	5 mph NNW	60%	1
9 AM	Sunny	59°	54°	3%	4 mph N	54%	2
10 AM	Sunny	62°	58°	2%	3 mph NNE	47%	4
11 AM	Sunny	65°	61°	1%	3 mph NE	41%	6
12 PM	Sunny	67°	63°	1%	4 mph ENE	36%	7
1 PM	Sunny	69°	64°	1%	5 mph ENE	30%	6
2 PM	Sunny	70°	64°	0%	6 mph ENE	26%	5
3 PM	Sunny	71°	64°	1%	6 mph ENE	24%	7
4 PM	Sunny	71°	64°	1%	5 mph ENE	22%	7
5 PM	Sunny	71°	64°	1%	5 mph NE	22%	7
6 PM	Clear	70°	63°	1%	6 mph NNE	24%	0
7 PM	Clear	68°	61°	1%	8 mph N	28%	0
8 PM	Clear	66°	59°	1%	8 mph NNW	34%	0
9 PM	Clear	65°	57°	1%	9 mph NNW	36%	0
10 PM	Clear	64°	57°	1%	8 mph NNW	36%	0
11 PM	Clear	63°	55°	1%	8 mph NNW	38%	0

Quick answers for the hours ahead

What is the warmest hour in Johannesburg today?

4 PM is forecast to be the warmest, at about 70°F (21°C) with cloudy.

Will it rain in Johannesburg tonight?

Unlikely - the evening precipitation chance stays at or below 4%.

When is the UV index highest in Johannesburg today?

Around 12 PM, when it reaches 8. From UV 3 upward, sun protection is recommended.

Johannesburg hour-by-hour: what to expect

Over the next 24 hours in Johannesburg, temperatures range from 55°F (13°C) around 7 AM up to 70°F (21°C) near 4 PM - right in line with the typical August high of 70°F (21°C).

Precipitation chances stay minimal throughout, so plans can skip the umbrella. UV reaches 8 (12 PM) - sun protection recommended through midday.

The “feels like” column blends humidity and wind into an apparent temperature - see how it works in our feels-like temperature guide. Planning further ahead? Check the Johannesburg 14-day forecast or the monthly climate averages.

Hourly forecasts nearby

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Johannesburg, South Africa Hourly Forecast