Last updated: August 31, 2025
Discover the charming weather of Knysna, South Africa, in December, characterized by warm temperatures and a refreshing atmosphere. With maximum highs reaching 30°C (87°F) and an average temperature of 19°C (66°F), it’s the perfect time to enjoy outdoor activities. Nights can be cooler, dipping to a minimum of 11°C (52°F). December also witnesses moderate rainfall, with about 45 mm (1.8 in) spread over 9 days, contributing to the lush landscapes. The humidity levels hover around 77%, creating a tropical feel that enhances the beauty of this coastal gem. Experience Knysna’s unique December climate, ideal for both adventure and relaxation!
In December, Knysna, South Africa, welcomes summer with mild temperatures perfect for outdoor adventures. With minimums around 11°C (52°F), the evenings are pleasantly cool, while the average temperature reaches 19°C (66°F), making it ideal for beach outings or exploring the area's stunning scenery. The daytime highs cap at 30°C (87°F), providing a warm, inviting atmosphere for both locals and visitors. This month continues the trend of gradually rising temperatures leading into the summer peak, ensuring that Knysna's residents can enjoy longer days filled with sunshine and vibrant activities.
December in Knysna, South Africa, sees a moderate precipitation amount of 45 mm (1.8 in), which is a slight dip compared to the wet November that precedes it. The month typically experiences about 9 days of rain, contributing to the overall lush greenery of the region. Looking at the trends throughout the year, December maintains a steady precipitation pattern following the peak of rainfall in November, yet still supports the local ecosystem without overwhelming it. This consistent rainfall marks the transition into summer, ensuring the landscape remains vibrant and inviting for both residents and visitors alike.
December in Knysna, South Africa, sees humidity settle at a comfortable 77%, reflecting a consistent trend throughout the year. As the holiday season approaches, moisture levels remain relatively steady, showing a slight increase compared to earlier months. Following a gradual rise from 73% in August to 79% in February, the humidity fluctuates around the mid-seventy mark for most months, suggesting a coastal climate that remains fairly pleasant. The consistency in humidity levels, particularly in the spring and summer months, enhances the region's natural beauty, making it an inviting destination for visitors seeking a mild and welcoming atmosphere.
In Knysna, South Africa, the December UV Index soars to a striking 14, reflecting an extreme exposure category with a burn time of just 10 minutes. This marks a return to the highest levels of UV radiation, a trend consistent with earlier months, as both January and February also recorded a UV Index of 14 and 13, respectively. The region sees a gradual decrease in UV levels as the year progresses, with March measuring a still significant 11 before dipping to 8 in April. As we move into late spring and summer, UV levels rise sharply again, emphasizing the importance of protective measures during these intense periods. To stay informed and safe, check out the detailed Knysna UV Index for essential insights on sun safety.
UV Risk Categories
December in Knysna, South Africa, shines bright with an impressive 415 hours of sunshine, marking it as the sunniest month of the year. As the days grow warmer, the sunlight stretches its golden rays, inviting both locals and visitors to embrace the outdoor beauty of this coastal paradise. This vibrant end to the year caps a gradual seasonal increase in sunshine, starting from 278 hours in June and steadily rising to a peak in December. Notable is the remarkable jump from 370 hours in October and 385 hours in November, showcasing a clear trend towards more daylight as summer takes hold. With each passing month, Knysna transforms into a sun-drenched haven, perfect for those seeking to soak up warmth and revel in the enchanting landscapes.
When considering the likelihood of sunny weather in December in Knysna, South Africa, it's interesting to note a gradual decline in sun chances as the year draws to a close. While December boasts a 41% probability of sunshine, this is one of the lowest figures compared to the sunnier months earlier in the year. For instance, January starts strong with 65%, followed closely by February at 62%. As the seasons shift towards winter, the sun's presence diminishes, hitting a low in November at 43%. This trend highlights that, although December can still offer some delightful sunny days, visitors might want to prepare for a bit more cloud cover as the festive season approaches.
In December, the daylight duration in Knysna, South Africa, reaches its peak at 14 hours, mirroring the long days of January. This trend represents a symmetrical pattern as the year unfolds, with daylight gradually decreasing from March's 12 hours down to a low of 9 hours in June. Following this mid-year dip, daylight begins to increase again, with July and August showing a consistent 10 hours of light. As the year transitions into spring and summer, daylight starts to grow once more, culminating in the bright December days. This cyclical ebb and flow of daylight not only marks the changing seasons but also enhances the vibrant outdoor lifestyle that Knysna is known for during the summer months.
As December sets in, Knysna experiences a gentle embrace of wind with an average speed of 4.1 m/s (9 mph), signaling a transition into the summer season. While this month shows a slight uptick from the previous months, it's notable that the region’s wind speed remains relatively stable throughout the latter half of the year. Following the peak of 4.4 m/s in January and a slight dip in April to 2.9 m/s, the winds in December maintain a steady presence, reflecting a consistent trend of mild breezes that provide a refreshing counterpoint to the warm coastal air. With the wind picking up slightly, the charm of Knysna is amplified, inviting both locals and visitors to relish the serene beauty of the landscape under tranquil skies.
Weather in Knysna varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Knysna, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, the weather in Knysna features a minimum temperature of 11°C (52°F) and an average of 19°C (66°F), with maximums reaching 30°C (87°F). The month experiences 45 mm (1.8 in) of precipitation over about 9 days, with humidity levels around 77%. In contrast, January sees slightly warmer conditions, with minimum temperatures rising to 12°C (55°F) and an average of 20°C (69°F), peaking at 31°C (89°F). Although January records a bit more precipitation at 49 mm (1.9 in) over 8 days, the humidity remains consistent at 77%. For more details on January's weather, visit Knysna weather in January.
In December, temperatures range from a minimum of 11°C (52°F) to a maximum of 30°C (87°F), with an average of 19°C (66°F). This month experiences around 45 mm (1.8 in) of precipitation over 9 days, and the humidity sits at 77%. Moving into February, the weather warms up slightly, with minimum temperatures of 13°C (55°F) and maximums reaching 35°C (94°F), averaging around 20°C (69°F). Precipitation remains similar at 43 mm (1.7 in) over 9 days, but humidity experiences a slight increase to 79%. For more detailed information, check Knysna weather in February.
In December, the weather features a warm average temperature of 19°C (66°F) with daytime highs reaching up to 30°C (87°F) and nighttime lows of 11°C (52°F). The month experiences approximately 45 mm (1.8 in) of rainfall over 9 days, and the humidity is relatively high at 77%. In contrast, March presents a similar warm climate with an average temperature of 19°C (67°F) and slightly higher maximum temperatures of 31°C (88°F). Precipitation is slightly lower at 42 mm (1.6 in) spread over 8 days, and humidity rises to 82%. To explore more about weather specifics for March, visit Knysna weather in March.
In December, the weather features a warmer temperature range, with minimums around 11°C (52°F) and average highs reaching up to 30°C (87°F), creating a pleasant atmosphere for outdoor activities. In contrast, April tends to be slightly cooler, with minimum temperatures around 9°C (49°F) and average highs of 31°C (88°F), making it a bit more comfortable for those who prefer milder conditions. Precipitation is more frequent in December, with 45 mm (1.8 in) over 9 days, while April sees less rainfall at 26 mm (1.0 in) spread across 7 days. The humidity is slightly higher in April at 81%, compared to December's 77%. For a detailed look at the April climate, you can visit Knysna weather in April.
December typically offers warmer weather compared to May, with average temperatures reaching 19°C (66°F) and a maximum of 30°C (87°F), compared to May's average of 16°C (61°F) and maximum of 28°C (82°F). Both months share similar humidity levels at 77%, but December sees slightly more rainfall, with 45 mm (1.8 in) over about 9 days, whereas May experiences 36 mm (1.4 in) of precipitation over 6 days. For more details on May weather, check out Knysna weather in May.
When comparing the weather in December and June, it's evident that December tends to be warmer and wetter. December has a minimum temperature of 11°C (52°F) and an average high of 30°C (87°F), while June's temperatures range from a cooler minimum of 6°C (43°F) to a maximum of 27°C (81°F). Precipitation is also more frequent in December, with 45 mm (1.8 in) falling over 9 days compared to June's 24 mm (1.0 in) over just 6 days. Additionally, humidity levels are slightly higher in December at 77% compared to June's 74%. For more details, you can check Knysna weather in June.
December and July present notably different weather conditions. In December, temperatures can range from a minimum of 11°C (52°F) to a maximum of 30°C (87°F), with an average temperature of 19°C (66°F). The month experiences a bit more precipitation, with 45 mm (1.8 in) spread over 9 days, and the humidity sits at a comfortable 77%.
In contrast, July sees cooler temperatures, with a minimum of 6°C (43°F) and a maximum of 26°C (79°F), averaging at 14°C (57°F). Precipitation is slightly lower at 41 mm (1.6 in) over just 6 days, while humidity is comparable at 76%. For those interested in the specifics of July weather, more details can be found at Knysna weather in July. Overall, December offers warmer and slightly wetter conditions compared to the cooler and drier atmosphere of July.
December and August present contrasting weather patterns, with December typically enjoying warmer temperatures. In December, temperatures range from a minimum of 11°C (52°F) to a maximum of 30°C (87°F), averaging around 19°C (66°F). The month sees an average precipitation of 45 mm (1.8 in) over nine days, accompanied by relatively high humidity at 77%. In contrast, August experiences cooler temperatures, with a minimum of 5°C (42°F) and a maximum of 26°C (80°F), culminating in an average of 13°C (56°F). Precipitation in August is higher at 61 mm (2.4 in), also spread across nine days, but with slightly lower humidity at 73%. For more detailed information about the weather conditions, you can check Knysna weather in August.
In December, temperatures in Knysna typically range from a minimum of 11°C (52°F) to a maximum of 30°C (87°F), with an average of 19°C (66°F). This month sees about 45 mm (1.8 in) of precipitation over nine days, along with a humidity level of 77%. In contrast, September experiences cooler temperatures, ranging from a minimum of 6°C (44°F) to a higher maximum of 33°C (91°F), with an average of 15°C (59°F). Although September receives slightly more rainfall at 59 mm (2.3 in) over the same number of days, the humidity is slightly lower at 75%. For more details, check out Knysna weather in September.
In December, the weather is generally warmer with average temperatures ranging from a minimum of 11°C (52°F) to a maximum of 30°C (87°F), compared to October, which has a slightly cooler average ranging from 9°C (48°F) to 33°C (91°F). While both months experience similar precipitation levels with about 9 days of rain, December sees a total of 45 mm (1.8 in) compared to October's 53 mm (2.1 in). Humidity levels are also marginally higher in December at 77%, compared to October's 75%. For a closer look at October's weather patterns, check out Knysna weather in October.
In comparing the weather of December and November, December generally features slightly warmer temperatures, with minimums of 11°C (52°F) and averages around 19°C (66°F) compared to November's minimum of 8°C (47°F) and average of 17°C (63°F). Notably, both months experience similar maximum temperatures, with December reaching up to 30°C (87°F) and November slightly higher at 31°C (88°F). Precipitation in December amounts to 45 mm (1.8 in) over 9 days, which is less than the 65 mm (2.6 in) of precipitation recorded in November, also over 9 days. Humidity levels remain comparable, with December at 77% and November at 75%. For a more detailed overview, you can check Knysna weather in November.
In December, Knysna transforms into a vibrant summer destination, boasting warmer temperatures that often peak at 30°C (87°F), inviting both visitors and locals to bask in the sun. Compared to the cooler winter months, the pleasant average of 19°C (66°F) brings a delightful contrast to the earlier chill, while nighttime temperatures can dip to a refreshing 11°C (52°F). Although precipitation is not uncommon, with about 45 mm (1.8 in) over 9 days, it only adds to the region's lush beauty. With humidity levels at 77%, the air feels crisp yet comfortable, making December a delightful time to explore everything Knysna has to offer. For a deeper dive into the weather patterns throughout the year, visit Knysna Climate.