Last updated: August 31, 2025
December in Stellenbosch, South Africa offers a delightful blend of summer warmth and refreshing breezes. With maximum temperatures reaching up to 31°C (89°F) and an average of 19°C (67°F), the days are perfect for outdoor adventures. Nights can be cooler, dipping to a pleasant 12°C (54°F). While the month sees some rain, with precipitation totaling 31 mm (1.2 in) over approximately 6 days, the 77% humidity adds to the lush, vibrant landscape. This combination creates an inviting atmosphere, making December a wonderful time to explore the scenic beauty and rich culture of Stellenbosch.
In December, Stellenbosch basks in the warmth of summer, with temperatures ranging from a pleasant 12°C (54°F) to a vibrant 31°C (89°F). This month's average temperature sits at 19°C (67°F), reflecting a steady increase compared to the cooler months preceding it. As the year draws to a close, the transition to more temperate conditions signals the arrival of long, sunny days perfect for outdoor adventures and vineyard explorations. With the max temperatures just shy of what's seen in January and February, December offers a delightful blend of warmth and comfort, making it an ideal time for both locals and travelers to enjoy the lush landscapes and festive atmosphere of this charming South African town.
In Stellenbosch, South Africa, December marks a transition into the warmer summer months, bringing a total precipitation of 31 mm (1.2 in) over approximately 6 days of rain. This figure reflects a notable shift from the heavier rains of the winter months, where June and July typically command the highest levels of precipitation, at 132 mm and 117 mm respectively. Interestingly, December's rainfall is lower than the preceding months, such as May and June, which averages around 80 mm and 132 mm. As the year winds down, this moderate rainfall supports the lush vineyards and farmlands of the region, showcasing a warm, inviting climate that is essential for both agriculture and tourism.
In Stellenbosch, South Africa, December ushers in a humidity level of 77%, maintaining a steady trend observed throughout the year. The moisture levels show a gentle fluctuation, peaking in the early months with January at 77% and slightly increasing to 81% in March. However, as the year progresses, humidity levels gradually taper off, reaching their lowest point in November at 75%. As December rolls in, the humidity rebounds slightly, mirroring its levels from January. This cycle reflects the region's typical humid climate, creating a comfortable environment as it transitions into a warm summer.
As December rolls into Stellenbosch, the UV Index hits an impressive high of 14, falling into the extreme exposure category with a quick burn time of just 10 minutes. This peak is consistent with the pattern observed in recent months, where the UV Index remains notably high from October through February, with values of 12 in November and 13 in February. The stark drop in UV levels begins in April, transitioning to more moderate exposure as the year progresses. Whether basking in the summer sun or planning your outdoor activities, it’s crucial to stay vigilant about sun protection during this time of year. For more details and daily updates, check out the Stellenbosch UV Index.
UV Risk Categories
December in Stellenbosch, South Africa, brings an impressive 421 hours of sunshine, marking it as the sunniest month of the year. This bright finale to the calendar consistently outshines the earlier months, with a noticeable increase from 390 hours in November and a significant leap from 313 hours in April. As summer approaches, the trend reveals a gradual rise in sunlight, peaking in December, which not only brightens the landscape but also enhances the region's renowned vineyards and outdoor attractions. The month serves as a vibrant reminder of the warm glow that characterizes Stellenbosch, inviting both residents and visitors to bask in its radiant charm as the year comes to a close.
In Stellenbosch, South Africa, December ushers in the festive season with a 58% chance of sunny weather, a welcome shift as the year draws to a close. Although this probability is lower than the summer peak seen in January and February, it remains significantly higher than the cooler months from April to November. As the temperatures begin to rise, residents and visitors alike can still anticipate occasional sunny days, making it a lovely time for outdoor activities and vineyard visits. Overall, December's weather hints at a pleasant balance—while not guaranteed, the warmth and light are sure to brighten the holiday spirit in this charming town.
In Stellenbosch, South Africa, December heralds the peak of daylight, offering an impressive 14 hours of sunshine each day. This trend of increasing daylight begins in September, where the duration starts to rise from 11 hours, reaching a sweet spot at 13 hours in both November and February. Conversely, the winter months see daylight dwindle, with June offering the least at just 9 hours. As the year winds down, daylight reestablishes itself in a rhythmic cycle, highlighting the region's delightful transitions between the long, luminous summers and shorter, sun-starved winters. The consistent pattern of increasing daylight duration as the seasons change not only beautifies the landscape but also invites residents and visitors alike to revel in the longer, sunlit days of summer.
As December rolls into Stellenbosch, the wind begins to whisper hints of summer, with an average wind speed of 4.5 m/s (10 mph). This slight uptick from the preceding months signals a gentle warm-up, as the region transitions from the cooler, calmer breezes of late autumn. Notably, December's winds maintain a solid 10 mph, aligning with the patterns observed in November and October, which have also showcased similar gusty charm. This steady yet refreshing breeze is characteristic of the late-year months, as January and February boast comparable speeds, hinting at a consistent climatic rhythm. Embracing this lively December wind can invigorate the senses, making it an ideal backdrop for outdoor activities and exploration in this picturesque South African vineyard landscape.
Weather in Stellenbosch varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Stellenbosch, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of December and January, January generally experiences slightly warmer temperatures, with average highs reaching 32°C (90°F) compared to December's peak of 31°C (89°F). The minimum temperature also rises slightly, from 12°C (54°F) in December to 13°C (55°F) in January. Additionally, January sees reduced rainfall, totaling only 20 mm (0.8 in) over about 3 days, while December receives 31 mm (1.2 in) over 6 days. Overall, both months maintain a consistent humidity level of 77%, contributing to a warm and humid climate. For more detailed information, check out Stellenbosch weather in January.
December and February both showcase predominantly warm weather, but some distinctions set them apart. In December, temperatures range from a minimum of 12°C (54°F) to a maximum of 31°C (89°F), with an average of 19°C (67°F). The month experiences a bit more rainfall, totaling 31 mm (1.2 in) over about 6 days, resulting in a humidity level of 77%. In contrast, February sees slightly warmer temperatures, with a minimum of 13°C (56°F) and an average temperature of 21°C (70°F), while still reaching a maximum of 31°C (89°F). Precipitation decreases significantly, dropping to 12 mm (0.5 in) across just 3 days, and humidity rises slightly to 80%. For a more detailed analysis of February's weather, you can check Stellenbosch weather in February.
December and March in Stellenbosch exhibit similar temperature ranges, with both months sharing a minimum of 12°C (54°F) and an average of 19°C (67°F). In December, temperatures can peak at 31°C (89°F), while March sees a slightly higher maximum of 32°C (90°F). Precipitation levels are comparable as well, with December totaling 31 mm (1.2 in) over 6 days and March slightly lower at 30 mm (1.2 in) across just 4 days. However, March experiences a higher humidity level at 81%, compared to December's 77%. For more detailed insights, check out the link: Stellenbosch weather in March.
In December, the weather tends to be warmer, with average temperatures around 19°C (67°F) and maximums reaching up to 31°C (89°F), while April experiences slightly cooler conditions with an average of 17°C (63°F) and maximums hitting 32°C (91°F). Both months see some precipitation, with December receiving 31 mm (1.2 in) over six days and April slightly higher at 37 mm (1.5 in) across five days. Humidity levels are also comparable, with December at 77% and April at 80%. For more detailed insights, you can check out Stellenbosch weather in April.
When comparing the weather in December and May, it’s evident that December is warmer overall, with average temperatures ranging from 19°C (67°F) to a maximum of 31°C (89°F), while May sees cooler averages of 15°C (59°F) and peaks at 27°C (81°F). December also experiences less precipitation, with 31 mm (1.2 in) over six days, compared to May's 80 mm (3.2 in) of rain spread over eight days. Despite December's higher temperatures, both months exhibit similar humidity levels, hovering around 77-78%. For more detailed insights into May's weather, you can visit Stellenbosch weather in May.
The weather in December is notably warmer than in June, with average temperatures ranging from a minimum of 12°C (54°F) to a maximum of 31°C (89°F), while June sees cooler temperatures averaging between 6°C (43°F) and 25°C (77°F). Additionally, December experiences less precipitation, with 31 mm (1.2 in) over 6 days, compared to June's 132 mm (5.2 in) spread over 11 days. Humidity levels remain relatively high in both months, at 77% in December and 79% in June, contributing to a distinctly different atmosphere. For more detailed information on June weather, visit Stellenbosch weather in June.
December and July present distinctly contrasting weather patterns. In December, temperatures range from a minimum of 12°C (54°F) to a maximum of 31°C (89°F), with an average temperature of 19°C (67°F). The month sees relatively low precipitation at 31 mm (1.2 in) over just 6 days, and humidity rests at 77%. In contrast, July features cooler temperatures, with a minimum of 5°C (41°F) and a maximum of 25°C (77°F), averaging 12°C (54°F). This month experiences significantly higher rainfall, totaling 117 mm (4.6 in) over 10 days, along with slightly higher humidity at 80%. For a more detailed overview, you can check Stellenbosch weather in July.
When comparing the weather in December and August, significant differences become apparent. December boasts higher temperatures, with a minimum of 12°C (54°F) and an average of 19°C (67°F), peaking at 31°C (89°F). In contrast, August experiences cooler conditions, with temperatures ranging from a minimum of 5°C (41°F) to an average of 12°C (54°F) and a maximum of 26°C (78°F). Precipitation also varies, as December sees 31 mm (1.2 in) of rain over just 6 days, while August receives a much wetter 91 mm (3.6 in) across 13 days. Notably, both months share a consistent humidity level of 77%. For more detailed insights, you can explore the Stellenbosch weather in August.
When comparing the weather in December and September, December generally presents warmer temperatures with a minimum of 12°C (54°F) and an average of 19°C (67°F), rising to a maximum of 31°C (89°F). In contrast, September starts cooler, with a minimum of 6°C (42°F) and an average temperature of 14°C (57°F), peaking at 29°C (85°F). Precipitation is less frequent in December, with 31 mm (1.2 in) over 6 days, compared to September's 58 mm (2.3 in) across 9 days. Humidity levels remain similar, with December at 77% and September at 76%. For more detailed information on September’s weather, you can visit Stellenbosch weather in September.
December weather in Stellenbosch is generally warmer than October, with average temperatures ranging from a minimum of 12°C (54°F) to a maximum of 31°C (89°F), compared to October's 6°C (44°F) minimum and 30°C (86°F) maximum. While both months have similar humidity levels at 77%, December experiences less precipitation, with 31 mm (1.2 in) over about 6 days, in contrast to October’s 52 mm (2.1 in) over 7 days. For more detailed insights, check out Stellenbosch weather in October.
In comparing the weather between November and December, it is evident that December tends to be warmer overall. December experiences a minimum temperature of 12°C (54°F) and an average of 19°C (67°F), with maximum temperatures reaching up to 31°C (89°F). In contrast, November sees slightly cooler temperatures, with a minimum of 9°C (48°F) and an average of 17°C (63°F), peaking at 29°C (84°F). Additionally, December has less precipitation, with 31 mm (1.2 in) over 6 days, compared to November's 46 mm (1.8 in) over just 5 days. Humidity levels are also slightly higher in December at 77%, compared to 75% in November. For more detailed insights, you can check out Stellenbosch weather in November.
As December unfolds in Stellenbosch, the weather transforms into a vibrant summer spectacle, marked by warm temperatures and increased humidity. With maximum highs reaching an inviting 31°C (89°F), the month contrasts sharply with the cooler winter months, making it an ideal time for outdoor activities and festive celebrations. Although there’s an average of 31 mm of rain spread across about six days, these brief showers often bring relief from the heat, ensuring lush landscapes for visitors and locals alike. To explore the full range of climatic patterns throughout the year, check out our detailed analysis at Stellenbosch Climate.