Johannesburg weather and climate in 2024
Day
26 °C
Night
15 °C
Sea
0 °C
Precipitation
131 mm
in month
Rainy days
15 days
in month
Daylight
13 hours
average
Sunshine
8 hours
average
Humidity
66 %
Day
26 °C
Night
15 °C
Sea
0 °C
Precipitation
131 mm
in month
Rainy days
15 days
in month
Daylight
13 hours
average
Sunshine
8 hours
average
Humidity
66 %
Overview: Johannesburg
Weather charts for Johannesburg
We make the most from 40 years of historical weather data to predict the best weather conditions.
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Weather overview for Johannesburg
Weather overview
Weather in Johannesburg, with its Highveld climate, presents a unique blend of mildness and variability. Daytime temperatures span from a cool 17 °C (62 °F) in the depths of winter to a warm 26 °C (79 °F) during the summer highs. Rainfall reaches its peak in the heart of the summer, with 131 mm (5.15 in) making January the wettest month, while the winter months see a dramatic decrease in precipitation, exemplified by a meager 4 mm (0.15 in) in July. The city is known for its clear sunny days, especially in winter, offering an abundance of sun hours. Humidity here varies throughout the year, with a tendency to be lower as winter approaches, creating comfortable living conditions.
January weather
January in Johannesburg is characterized by warm daytime temperatures averaging 26 °C (79 °F), while night temperatures can go as low as 15 °C (58 °F). With a total precipitation of 131 mm (5.15 in), the rainy season is in full swing, resulting in a high number of wet days, approximated at 15 days. Expect mostly cloudy skies, with around 8 hours of sunshine daily.
February weather
February sees a subtle decrease in both temperatures and rainfall. The daytime temperature dwells around 26 °C (78 °F), while nighttime cools down to an average of 14 °C (57 °F). Rainfall measures at 102 mm (4.02 in), and you'll encounter rain on average 12 days this month. Sun hours slightly increase, up to 8 hours per day.
March weather
Entering March, Johannesburg's weather begins transitioning with an average day temperature of 25 °C (76 °F) and nighttime cooling to 13 °C (55 °F). The wet period starts tapering with rainfall at 90 mm (3.56 in) and about 11 days of wet days. Increased sun hours to around 8 hours portray clearer skies as the region edges out of the wet season.
April weather
April in Johannesburg sees an appreciable drop in rainfall with a total of 42 mm (1.67 in) and a further dip in daytime temperatures to an average of 22 °C (72 °F). A decrease in wet days to around 7 days signifies a drier period. Sun hours reach a pleasing 8 hours, and night temperatures can fall to 9 °C (49 °F).
May weather
As winter approaches in May, Johannesburg experiences a significant reduction in rainfall to just 16 mm (0.63 in), and the number of wet days drops to a mere 2 days. Daytime temperatures cool to around 20 °C (67 °F), with nighttime lows averaging 5 °C (41 °F). Sun hours ascend to an impressive 9 hours, indicating predominantly clear skies.
June weather
June is the onset of Johannesburg's cool season, with the average daytime reaching just 17 °C (62 °F) and night temperatures dipping to around 2 °C (36 °F). Rain is virtually non-existent, with an average of 10 mm (0.39 in) of rain and less than 2 days of wet days. Sun hours are at their zenith with 9 hours, and clear, sunlit skies are the norm.
July weather
July reaffirms its status as the core of Johannesburg's winter with scarce rainfall, summing up to only 4 mm (0.15 in), and approximately 1 day expected to be wet. The city's temperatures hover around the daytime average of 17 °C (62 °F) and a night low of 2 °C (36 °F). Abundant sunny hours peak at 9 hours, accentuating the starkly clear and dry winter climate.
August weather
August in Johannesburg retains its chilly mornings with an average night temperature of 5 °C (40 °F), but days begin to warm mildly to 20 °C (67 °F). Rainfall remains low at 9 mm (0.34 in) and rain is expected on roughly 1 day. Sun hours continue to impress with an average of 10 hours, signaling a predominantly sunny and dry close to winter.
September weather
September sees Johannesburg emerge into spring with sun hours peaking at 10 hours and daily temperatures rising to an amiable 23 °C (74 °F). Night temperatures also warm slightly to 8 °C (47 °F). Rainfall begins to creep up again, reaching 22 mm (0.88 in), spread across about 3 days as a prelude to the summer rains.
October weather
October's weather in Johannesburg is a blend of increasing warmth and precipitation. With a day temperature of 24 °C (76 °F) and night averages at 11 °C (52 °F), the climate feels more summery. The number of wet days rises to 9 days, and rainfall accumulates to 71 mm (2.81 in). Sun hours slightly diminish to around 9 hours due to greater cloud coverage.
November weather
With summer drawing closer, November in Johannesburg brings further warming and rains. Daytime temperatures commonly reach 25 °C (77 °F), and night tends towards a comfortable 12 °C (54 °F). The likelihood of encountering rain increases, as evidenced by 102 mm (4.01 in) of rainfall and near 13 days of wet days projected. Sun hours take a slight dip to 8 hours because of increased cloud cover.
December weather
December in Johannesburg sees the peak of summer with daytime temps around 25 °C (78 °F) and nights at 14 °C (57 °F). Rain is significant with an average of 125 mm (4.91 in) and roughly 15 days accounting for an increased number of rainy days. Despite the rains, sun hours are sustained at about 9 hours, showing that sunny spells are common between showers.
FAQs
How likely is it to experience rain in Johannesburg during January?
Rain is quite common in January, with an average of 15 days of rain. The likelihood of precipitation is high during this period.
Do I need an umbrella in Johannesburg during February?
An umbrella would be a wise choice as you may face rain for approximately 12 days throughout the month of February.
Is March still part of the rainy season in Johannesburg?
March sees the tail-end of the rainy season with noticeable rain on 11 days, but expect the weather to start drying up.
Does Johannesburg begin to dry out in April?
April does see Johannesburg starting to dry out, with fewer rainy days (roughly 7 days) and less precipitation.
Can I expect many rainy days in Johannesburg during May?
Rain is scarce in May, with precipitation occurring on only about 2 days, so rain will be a rare interruption.
Is it cold in Johannesburg during June?
By local standards, it is quite cold in June, especially at night with temperatures around 2 °C (36 °F), while daytime averages a cooler 17 °C (62 °F).
Are rainy days common in Johannesburg during July?
Rainy days in July are exceedingly rare in Johannesburg, with almost negligible precipitation and less than a day's worth of rain expected.
Can I expect much rain in Johannesburg during August?
Rain is still a rarity in August, with little to no precipitation and only a handful of wet days worth noting.
Does September signal the return of rain in Johannesburg?
While still relatively dry, September does hint at the comeback of the rain with some precipitation starting to occur.
Is the weather in Johannesburg considerably wet in October?
October sees a moderate increase in wetness, with frequent rains totaling 71 mm (2.81 in) over approximately 9 days throughout the month.
How often does it rain in Johannesburg during November?
Rain becomes more frequent in November, with expected wet days nearing 13 days, so staying prepared for precipitation is advisable.
Is December the wettest month in Johannesburg?
While December is one of the wetter months with 125 mm (4.91 in) of rain spread over 15 days, January actually holds the title for the wettest month.
We make the most from 40 years of historical weather data to predict the best weather conditions.
Deciding on where to go for a holiday is hard sometimes. Get inspired by the most popular destinations.
We aggregate data from combining multiple weather sources to ensure accuracy of the highest order.