April Weather in Johannesburg, South Africa

Last updated: August 31, 2025

April in Johannesburg, South Africa welcomes a delightful transition into autumn, with maximum temperatures reaching around 29°C (85°F) and an average of 16°C (61°F), ensuring warm days and cool evenings. While the minimum temperature can dip to a brisk 3°C (38°F), the weather remains inviting for both outdoor activities and cozy gatherings. This month also brings a touch of moisture, with precipitation totaling 63 mm (2.5 in) over approximately 10 days, contributing to the lush scenery of the region. Humidity is notably high at 81%, accentuating the refreshing atmosphere after gentle showers. Enjoy the vibrant changes of Johannesburg’s April weather!

April Temperature in Johannesburg

As April unfolds in Johannesburg, temperatures begin to dip slightly, offering a refreshing transition from the warmth of summer. With minimums plummeting to around 3°C (38°F) and averages hovering at 16°C (61°F), residents and visitors alike experience a breezy shift. Despite the cooler mornings, daytime highs can still soar to a pleasant 29°C (85°F), inviting outdoor activities and exploration. This month heralds a clear trend towards mild weather, setting the stage for the cooler months ahead while maintaining the vibrant energy of the city. Whether you're enjoying a morning coffee in a sunlit café or taking a stroll through its lush parks, April in Johannesburg presents a delightful blend of crispness and warmth.

April Weather in Johannesburg: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Johannesburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Johannesburg, April typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec696866615651505763666868
Data source: Temperature data for Johannesburg generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

April Precipitation in Johannesburg

April in Johannesburg marks a notable decline in precipitation, with an average of 63 mm (2.5 in) of rainfall, down from the heavier showers of the previous months. This drop is accompanied by a consistent trend of 10 precipitation days, similar to March, but markedly lower than the peak of 16 days in February. As autumn deepens, the region's transition toward its dry winter is evident, with significantly less rainfall expected in the upcoming months. The abrupt shift from the lushness of late summer to the parched winter months further emphasizes Johannesburg's distinct seasonal patterns, making April a pivotal time as the city begins to brace for the dry spell ahead.

April Precipitation Trends in Johannesburg

The chart displays monthly precipitation patterns in Johannesburg, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Johannesburg, April typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec13013879631362396397146
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Johannesburg

In April, Johannesburg experiences a notable increase in humidity, reaching 81%, highlighting a trend toward more humid conditions as the seasons transition. Following the milder humidity levels of March at 77%, this rise signals the onset of the wetter months ahead, as May further amplifies humidity to 82%. This period contrasts sharply with the drier winter months of June and July, where humidity dips to 73% and 71%, respectively. Overall, April serves as a pivotal month, marking a shift towards a more humid climate that persists into late spring and early summer, creating a lush environment for the city's vibrant landscapes.

April Average Humidity in Johannesburg

This chart illustrates the average monthly humidity levels in Johannesburg, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Johannesburg is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%77%77%81%83%73%71%68%74%74%82%81%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Johannesburg

In April, Johannesburg experiences a notable transition in its UV Index, dropping to 10, which falls into the very high exposure category. This is a slight decrease from the previous months, yet still requires vigilance, with a burn time of just 15 minutes. Throughout the summer months from January to March, the UV Index peaked at extreme levels of 15 and 13, demanding urgent attention to sun safety. Post-April, as the cooler months of May to July roll in, the UV Index continues to decline, indicating a shift towards lower exposure risk. However, April remains a month when sun protection is essential, making it crucial to stay informed about the Johannesburg UV Index for your outdoor activities. For more details, visit Johannesburg UV Index.

Maximum UV Index Levels in Johannesburg for April

The chart shows the monthly maximum UV Index (UVI) for Johannesburg in April, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In April, the maximum UV index in Johannesburg typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec15151310766811121416
Data source: Johannesburg April UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

April Sunshine in Johannesburg

In April, Johannesburg enjoys a delightful 315 hours of sunshine, maintaining a healthy brightness following the vibrant month of March, which boasts a remarkable 354 hours. This sunny April reflects a gradual transition towards the peak of the year, where daylight begins to increase consistently. As residents and visitors relish the favorable weather, it sets the tone for the approaching months, evident in May’s 319 hours of sunlight. The city's sunshine showcases a pattern of abundance, particularly peaking in the later months with November and December reaching impressive totals of 370 and 371 hours, respectively. April serves as a charming reminder of the warmth that Johannesburg offers, perfectly nestled within a year that reflects both variety and vibrancy in its sunshine hours.

Monthly Sunshine Duration in Johannesburg: April Highlighted

The April sunshine duration represents the total number of hours Johannesburg experiences direct sunlight during the month of April, excluding cloudy or obstructed periods. This chart compares the sunshine duration of April with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec308h317h354h315h319h298h314h329h337h362h370h371h
Data source: Johannesburg April Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Johannesburg During April

In Johannesburg, April showcases a remarkable transition into the sunny season, boasting a compelling 81% chance of sunny weather. This marks a significant increase from March's 67%, highlighting the arrival of more consistent sunshine as autumn unfolds. The trend continues into May, where sunny days remain abundant at 80%, and June sees an even more impressive 83%. As winter approaches, July takes the lead with an outstanding 95% likelihood of clear skies, suggesting that if you're keen on basking in the sun, April is an ideal time to enjoy Johannesburg's bright charm before the peak of winter sunshine.

Percentage of Sunny Days in April in Johannesburg

The chart illustrates the percentage of sunny days in Johannesburg throughout the year, with April highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Johannesburg experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec29%33%67%81%80%83%95%80%78%61%60%41%
Data source: Johannesburg April chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Johannesburg in April

As the calendar flips to April in Johannesburg, daylight begins to wane, with an average of 11 hours of sunlight. This marks a gentle decline from the 12 hours experienced in the preceding months of January, February, and March. The trend reflects a gradual shift towards winter, as daylight hours will continue to decrease in May and remain consistent in the colder months of June and July. Interestingly, this pattern of diminishing daylight reverses in August, as the days begin to lengthen again, leading into the spring months. Overall, April serves as a transitional period, heralding the approach of winter while still basking in the remnants of summer's longer days.

Average Daylight Hours in Johannesburg for April

The chart illustrates the variation in daylight duration in Johannesburg throughout the year, with April highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec13h 33m12h 57m12h 12m11h 26m10h 48m10h 30m10h 40m11h 12m11h 56m12h 42m13h 23m13h 44m
Data source: Johannesburg daylight hours, calculated by summing the hours between sunrise and sunset for each day.

April Winds in Johannesburg

As April graces Johannesburg, the winds whisper a gentle tune, with an average speed of 2.6 m/s (6 mph)—steady and unchanging since March. This slight lull in breezy vigor marks a transitional period, as the city bids farewell to the cooler summer months. While wind speeds will rise in the coming months, peaking in November at 4.2 m/s (9 mph), April’s calm presents a serene backdrop, allowing residents and visitors to savor the crisp autumn air without the bluster that typically ushers in winter. This trend toward increased breeziness is a gentle reminder that changes are always on the horizon, fostering an air of anticipation as Johannesburg prepares for the shifts ahead.

Average April Wind Speed in Johannesburg

The chart displays monthly wind speed patterns in Johannesburg, with values for each month shown alongside April's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how April's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.22.82.62.6 m/s2.72.92.93.93.73.74.23.3
Data source: Johannesburg April wind data, generated using information from the Copernicus Climate Change Service.

How April Weather in Johannesburg Compares to Other Months

Weather in Johannesburg varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Johannesburg, focusing on differences in temperature, rainfall, humidity, and UV levels.

When comparing the weather in April and January, notable differences emerge in temperature and precipitation. In April, temperatures range from a minimum of 3°C (38°F) to a maximum of 29°C (85°F), with an average of 16°C (61°F) and 63 mm (2.5 in) of precipitation spread over 10 days. In contrast, January boasts warmer temperatures with a minimum of 9°C (48°F) and a maximum of 33°C (92°F), averaging 20°C (69°F). Additionally, January is wetter, receiving 130 mm (5.1 in) of rain over 14 days, while maintaining a slightly lower humidity level at 79%. For more detailed weather information on January in Johannesburg, visit Johannesburg weather in January.

When comparing the weather in February and April, February tends to be warmer overall, with average temperatures ranging from a minimum of 10°C (51°F) to a maximum of 31°C (87°F). In contrast, April experiences cooler temperatures, with a minimum of 3°C (38°F) and a maximum of 29°C (85°F). February also sees significantly higher precipitation, totaling 138 mm (5.4 inches) over 16 days, compared to April’s 63 mm (2.5 inches) over 10 days. However, the humidity is slightly higher in April at 81%, compared to February's 77%. For a more detailed look at February weather, check out Johannesburg weather in February.

In comparing the weather between March and April, we see notable differences in temperature and precipitation. March experiences a higher minimum temperature of 8°C (46°F) and a slightly warmer average of 19°C (66°F), peaking at a maximum of 30°C (86°F). In contrast, April starts off cooler, with a minimum temperature of 3°C (38°F) and an average temperature of 16°C (61°F), reaching a maximum of 29°C (85°F). Additionally, March has slightly more precipitation, totaling 79 mm (3.1 in) over 10 days, while April sees 63 mm (2.5 in) with the same frequency of rainy days. Humidity levels are also a bit higher in April at 81%, compared to March's 77%. For more details on March weather, visit Johannesburg weather in March.

In comparing the weather between April and May, April is characterized by warmer temperatures, with an average of 16°C (61°F) and maximums reaching up to 29°C (85°F). In contrast, May sees a drop in the average temperature to 13°C (56°F) and maximums peaking at 26°C (78°F). Precipitation levels also differ significantly; April experiences 63 mm (2.5 in) over approximately 10 days, while May is much drier, with only 13 mm (0.5 in) of rain occurring on just 1 day. Despite this, humidity remains quite high in both months, with April at 81% and May slightly higher at 82%. For a more detailed look at May weather in Johannesburg, visit Johannesburg weather in May.

April and June showcase a notable contrast in weather patterns. In April, temperatures range from a minimum of 3°C (38°F) to a warm average of 16°C (61°F) and can peak at 29°C (85°F). This month experiences more precipitation, with 63 mm (2.5 in) over about 10 days, contributing to a higher humidity level of 81%. In contrast, June sees a cooler climate, with temperatures hitting a minimum of -4°C (24°F), averaging 11°C (51°F) and maxing out at 24°C (76°F). Precipitation drops significantly to just 6 mm (0.2 in) on only 1 day, and the humidity is lower at 73%. For more details on the specific weather conditions, you can refer to Johannesburg weather in June.

April and July exhibit contrasting weather patterns. In April, the temperatures range from a minimum of 3°C (38°F) to a maximum of 29°C (85°F), with an average of 16°C (61°F). This month also tends to be wet, receiving around 63 mm (2.5 in) of precipitation across about 10 days and maintaining a high humidity level of 81%. In contrast, July experiences cooler temperatures, with a minimum of -4°C (25°F) and a maximum of 25°C (78°F), averaging only 10°C (51°F). It is significantly drier, recording just 2 mm (0.1 in) of precipitation and featuring no rainy days, alongside a lower humidity of 71%. For more detailed information about July weather, check out Johannesburg weather in July.

When comparing April and August weather, April experiences a wider temperature range with minimums around 3°C (38°F) and maximums peaking at 29°C (85°F), averaging 16°C (61°F). In contrast, August sees lower minimum temperatures of -1°C (30°F) and slightly cooler maximums at 27°C (80°F), with an average of 14°C (57°F). April is much wetter, with 63 mm (2.5 in) of precipitation over roughly 10 days, whereas August is quite dry, receiving only 3 mm (0.1 in) over no rainy days. Additionally, April tends to feel more humid, with a humidity level of 81%, compared to August's 68%. For more detailed information, check Johannesburg weather in August.

April and September showcase distinct weather patterns, reflecting the transition into and out of winter. In April, temperatures range from a cool minimum of 3°C (38°F) to a warm maximum of 29°C (85°F), with an average of 16°C (61°F). This month experiences higher precipitation at 63 mm (2.5 in) over about 10 days, accompanied by humidity levels of 81%. In contrast, September sees a wider temperature range, with minimums dropping to -1°C (31°F) and maximums reaching 32°C (91°F), averaging around 17°C (64°F). Notably, September is much drier, with only 8 mm (0.3 in) of precipitation, spread over just 2 days, and a slightly lower humidity of 74%. For more detailed information, you can check Johannesburg weather in September.

April and October offer distinct yet pleasant weather patterns. In April, temperatures range from a minimum of 3°C (38°F) to a maximum of 29°C (85°F), with an average of 16°C (61°F). The month experiences around 63 mm (2.5 in) of precipitation over 10 days, and humidity remains relatively high at 81%. In contrast, October features slightly warmer temperatures, with a minimum of 4°C (40°F) and a maximum of 33°C (92°F), averaging 19°C (66°F). Precipitation levels are similar at 63 mm (2.5 in), but rain falls on just 8 days, and humidity drops to 74%. For detailed insights into October weather in Johannesburg, visit Johannesburg weather in October.

April and November exhibit distinctly different weather patterns, highlighting the transition in seasons. In April, temperatures range from a chilly 3°C (38°F) to a warm 29°C (85°F), with an average of 16°C (61°F). The month experiences about 63 mm (2.5 in) of precipitation over approximately 10 days, coupled with a humidity level of 81%. In contrast, November tends to be warmer, with temperatures starting at 4°C (40°F) and peaking at 34°C (93°F), averaging around 20°C (68°F). This month sees increased rainfall, totaling about 97 mm (3.8 in) over around 13 days, while humidity remains slightly higher at 82%. For a detailed look at weather specifics, check Johannesburg weather in November.

April and December present contrasting weather patterns, despite similar humidity levels of 81%. In April, temperatures range from a cool minimum of 3°C (38°F) to a warm maximum of 29°C (85°F), with an average of 16°C (61°F) and a total precipitation of 63 mm (2.5 in) over about 10 days. In contrast, December boasts a milder minimum temperature of 10°C (50°F) and significantly warmer highs, peaking at 34°C (93°F) with an average of 20°C (69°F). Additionally, December experiences heavier rainfall, totaling 146 mm (5.7 in) across 19 days. For more details, you can check out Johannesburg weather in December.

Compare Johannesburg's Climate with Cities Worldwide

Conclusion: What to Expect From April Weather in Johannesburg

As April transitions into the cooler months, Johannesburg experiences a delightful shift in weather, combining mild temperatures with a hint of refreshing rainfall. While daytime highs can still reach a pleasant 29°C, evenings bring a chill, often dropping down to around 3°C. This notable temperature fluctuation differentiates April from the preceding summer months, allowing residents and visitors to enjoy the city's vibrant outdoor activities in comfortable conditions. With approximately 63 mm of precipitation spread over about 10 days, the air feels refreshingly humid at 81%, providing a much-needed reprieve from the summer heat. For more insights into the climate throughout the year, explore Johannesburg Climate.