Last updated: August 31, 2025
Experience the diverse climate of Cape Town in September, where temperatures can soar up to a pleasant 28°C (82°F) while the average hovers around 15°C (59°F). With a cool minimum dipping to 9°C (48°F), this transitional month showcases a refreshing mix of warmth and mildness. Along with the comfortable temperatures, precipitation is noted at 45 mm (1.8 in) over 8 days, contributing to the region's vibrant flora. The humidity level stands at a notable 76%, adding to the overall crispness in the air. September encapsulates the beauty and variability of Cape Town’s early spring, making it a charming time to explore this stunning city.
As September unfolds in Cape Town, the city begins to shake off the chill of winter, showcasing a refreshing transition into spring. With minimum temperatures hovering around 9°C (48°F) and an average of 15°C (59°F), the air feels crisp yet inviting. It's a month that sees maximum highs reaching a delightful 28°C (82°F), reminiscent of summer's embrace without being overwhelming. This gradual warming trend is marked by a notable increase in daylight and the blossoming of local flora, making it an ideal time for outdoor adventures. Visitors can expect a perfect blend of mild warmth and cool breezes, setting the stage for stunning views and vibrant experiences in this stunning coastal city.
In September, Cape Town experiences a noticeable shift in precipitation, with an average rainfall of 45 mm (1.8 in) over approximately 8 days. This marks a transition from the heavier rains of the winter months, as the city gradually moves towards drier spring conditions. While September's rainfall is lower than that of the preceding months, it still represents a significant presence of moisture that nourishes the landscape. This transitional period is essential for replenishing local flora ahead of the summer, reflecting a blend of lingering winter rains and the creeping warmth of spring. As the season progresses into October, rainfall begins to taper off further, hinting at the dry summer ahead.
In September, Cape Town experiences a slight dip in humidity, averaging 76%, marking a transition into the drier months. This reduction follows a summer peak with humidity levels of 81% in March and 80% in April, creating a noticeable shift as the seasons change. After a gradual decline from the higher humidity of winter months like 80% in July and 79% in June, September's lower reading hints at the onset of spring, where conditions become more comfortable. Overall, this month acts as a bridge between the humidity-laden winter and the drier conditions of late spring, reflecting the city's dynamic climate.
In September, Cape Town experiences a UV Index of 9, categorizing it as very high exposure, with a burn time of just 15 minutes. This marks a notable shift from the milder conditions of winter, with the UV levels beginning to climb towards the extremes seen earlier in the year. As the city transitions into spring, the UV Index rises steadily, hinting at the intense sun ahead, especially as summer approaches. It's essential for residents and visitors alike to remain vigilant about sun protection during this time. For more detailed information on UV radiation levels, check out Cape Town UV Index.
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As September unfolds in Cape Town, the city enjoys 328 hours of radiant sunlight, providing a delightful glimpse into the approaching summer months. This modest yet invigorating increase in sunshine follows a slightly lower August, hinting at the gradual transition from winter's embrace. The trend is clear: as the year progresses, Cape Town's sun-drenched days steadily accumulate, peaking impressively in December with a stunning 422 hours. September serves as a gentle reminder of the warmth and vibrancy awaiting as the days grow longer, encouraging locals and visitors alike to bask in the sun's glow and explore the breathtaking landscapes that define this captivating city.
As September rolls in, Cape Town experiences a 57% chance of sunny weather, marking a noticeable shift from the balmy summer months of January and February, which boast an impressive 81% chance of sunshine. The transition into early spring shows a gradual increase in precipitation, with sunlit days gradually becoming less frequent compared to the peak summer months. Despite a relatively moderate sun probability, September serves as a vibrant prelude to the warmer months ahead, suggesting that while sunshine may be less assured, the beauty of the changing season still promises plenty of opportunities for outdoor enjoyment in this picturesque city.
As September arrives in Cape Town, the city experiences a gradual increase in daylight, basking in 11 hours of sunlight. Following the mid-year low of 9 hours in June, daylight begins to lengthen, reflecting the shift toward spring. This trend continues into October, where daylight extends to 12 hours, and November brings an even more generous 13 hours of brightness. The rhythm of the seasons is evident, with short winter days transforming into longer, sun-kissed afternoons. September serves as a gentle reminder that the vibrant summer months are just around the corner, inviting both locals and visitors to enjoy the unfolding beauty of the South African landscape.
As September rolls into Cape Town, the coastal breezes begin to pick up, averaging 5.7 m/s (13 mph)—a noticeable increase from the calmer months of winter. This transition marks a shift from the gentler winds of May to August, where speeds hovered around 4.0 m/s to 4.7 m/s. The warming spring air invites a refreshing boost in gusts, setting the stage for a vibrant outdoor atmosphere. In fact, September's winds are a prelude to the brisker breezes of the upcoming months, as October and November maintain similar speeds at 5.6 m/s and 5.8 m/s, respectively. As the seasons change, these winds not only enhance Cape Town's scenic beauty but also stir a sense of anticipation for the sunny days ahead.
Weather in Cape Town varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Cape Town, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, Cape Town experiences a broad temperature range with a minimum of 9°C (48°F) and a maximum of 28°C (82°F), averaging around 15°C (59°F). The month is characterized by moderate humidity at 76% and receives about 45 mm (1.8 in) of precipitation over roughly 8 days. In contrast, January's weather sees a warmer start, with minimum temperatures at 15°C (59°F) and averages reaching 20°C (68°F), while still peaking at 28°C (82°F). This month is notably drier, with only 14 mm (0.6 in) of rain over just 2 days and a slightly higher humidity level at 77%. For more details on January weather, check out Cape Town weather in January.
September and February present distinct weather profiles in Cape Town. September experiences a wider temperature range with a minimum of 9°C (48°F) and a maximum of 28°C (82°F), averaging around 15°C (59°F). This month sees a fair amount of rainfall, with 45 mm (1.8 in) over about 8 days, alongside a humidity level of 76%. In contrast, February boasts a milder temperature range, with a minimum of 15°C (59°F) and a maximum of 27°C (81°F), averaging 20°C (68°F). It is significantly drier, with only 10 mm (0.4 in) of precipitation spread across 2 days, while the humidity remains relatively high at 80%. For more details about February weather in Cape Town, you can check out Cape Town weather in February.
When comparing the weather in September and March, we see notable differences in temperature and precipitation. September has a minimum temperature of 9°C (48°F) and an average of 15°C (59°F), while March starts at a higher minimum of 13°C (56°F) and averages 19°C (66°F). Both months reach a maximum temperature of 28°C (82°F), but September experiences more precipitation with 45 mm (1.8 in) over 8 days, compared to March's 24 mm (1.0 in) over just 4 days. Additionally, March has a slightly higher humidity level at 81%, while September’s humidity is recorded at 76%. For more detailed information about March weather, you can check Cape Town weather in March.
When comparing the weather in September and April, it's evident that April tends to be warmer overall. September showcases a temperature range from a cooler minimum of 9°C (48°F) to a maximum of 28°C (82°F), with an average of 15°C (59°F). In contrast, April starts off slightly warmer with a minimum of 11°C (53°F) and can reach up to 31°C (88°F), averaging 17°C (63°F). Precipitation is also lower in April, totaling 30 mm (1.2 in) over 5 days compared to September's 45 mm (1.8 in) across 8 days. Interestingly, both months experience similar humidity levels, with September at 76% and April slightly higher at 80%. For more detailed information, you can check Cape Town weather in April.
In September, the weather features a broader temperature range with a minimum of 9°C (48°F), an average of 15°C (59°F), and a maximum of 28°C (82°F). The month sees an average precipitation of 45 mm (1.8 in) over approximately 8 days, with humidity at 76%. In contrast, May offers a slightly milder climate, starting at the same minimum of 9°C (48°F) but reaching an average of 16°C (60°F) and a maximum of 25°C (78°F). The precipitation increases to 63 mm (2.5 in) over about 7 days, with a slightly higher humidity of 78%. Overall, while September brings warmer highs, May has a more consistent coolness with increased rainfall. For more details, you can check Cape Town weather in May.
September and June present distinct weather patterns characterized by temperature and precipitation differences. In September, temperatures range from a minimum of 9°C (48°F) to a maximum of 28°C (82°F), with an average of 15°C (59°F). The month sees less rain, with 45 mm (1.8 in) of precipitation over around 8 days and a humidity level of 76%. In contrast, June experiences cooler temperatures, ranging from 9°C (48°F) to a maximum of 23°C (74°F), with an average of 14°C (58°F). This month is also wetter, receiving 103 mm (4.1 in) of rainfall over 11 days and higher humidity at 79%. For more details on the weather in June, you can check Cape Town weather in June.
In comparing the weather between September and July, September tends to be warmer overall, with average temperatures reaching 15°C (59°F) and maximums peaking at 28°C (82°F). In contrast, July experiences cooler temperatures, averaging 14°C (57°F) and a maximum of only 24°C (75°F). Precipitation is notably higher in July, with 95 mm (3.7 in) falling over approximately 10 days, while September sees less rain at 45 mm (1.8 in) over 8 days. Humidity levels are slightly lower in September at 76%, compared to 80% in July. For more details, you can check Cape Town weather in July.
In comparing the weather of September and August, September presents slightly warmer conditions with average temperatures rising to 15°C (59°F) compared to August's 13°C (56°F). The maximum temperature in September reaches 28°C (82°F), notably higher than August's peak of 24°C (76°F). However, September also experiences less precipitation, totaling 45 mm (1.8 in) over 8 days, whereas August sees more rain with 75 mm (3.0 in) over 11 days. Humidity levels are similar in both months, with September at 76% and August at 77%. For a detailed look at August weather patterns, visit Cape Town weather in August.
In September, the weather showcases a blend of mild and warm temperatures, with a minimum of 9°C (48°F) and a maximum of 28°C (82°F), leading to an average temperature of 15°C (59°F). The month experiences about 45 mm (1.8 in) of precipitation over 8 days, accompanied by a humidity level of 76%. In contrast, October ushers in slightly warmer temperatures, with a minimum of 11°C (51°F) and an average of 16°C (61°F), peaking at 27°C (81°F). Precipitation decreases to 41 mm (1.6 in) spread over just 5 days, and humidity remains comparable at 77%. Overall, October offers a marginally warmer and drier experience than September, making it a pleasant time to enjoy the outdoors. For more details, check out Cape Town weather in October.
In September, the weather tends to be warmer during the day with a maximum temperature reaching 28°C (82°F), while the average temperature sits around 15°C (59°F). The month experiences about 45 mm (1.8 in) of rainfall over approximately 8 days, resulting in a relatively humid atmosphere with 76% humidity. In contrast, November brings slightly cooler temperatures, with a maximum of 25°C (77°F) and an average of 17°C (64°F). Precipitation decreases to 33 mm (1.3 in) over just 5 days, and humidity remains slightly lower at 75%. For more detailed insights into November weather, check out Cape Town weather in November.
In September, the weather in Cape Town is marked by mild temperatures, with a minimum of 9°C (48°F) and an average of 15°C (59°F), but it can reach up to 28°C (82°F) during warmer days. The month experiences about 45 mm (1.8 in) of precipitation over approximately 8 days, and the humidity stands at 76%. In contrast, December brings warmer conditions, with a minimum temperature of 14°C (58°F) and an average of 19°C (66°F), also peaking at 28°C (82°F). Precipitation drops to 26 mm (1.0 in) over just 5 days, while the humidity slightly increases to 77%. For more details, you can explore Cape Town weather in December.
As September unfolds in Cape Town, the city transitions from winter to spring, presenting a delightful warmth that invites outdoor exploration. With average temperatures rising above the chill of previous months, daytime highs reach a pleasant 28°C (82°F), while nights remain comfortably cool at around 9°C (48°F). However, this month also brings increased humidity and a few rainy days, with approximately 45 mm of precipitation spread over eight days. Overall, September offers a refreshing blend of sunny days and mild conditions, making it a unique time to experience the city's vibrant beauty. For more details, visit Cape Town Climate.