Last updated: August 31, 2025
December in Clanwilliam, South Africa, presents a striking contrast in weather, with maximum temperatures soaring to 39°C (102°F), offering a taste of summer heat. The average temperature rests comfortably at 21°C (70°F), while nights can be pleasantly cool, dipping to a minimum of 6°C (44°F). This month sees limited rainfall, with only 16 mm (0.6 in) recorded over just two days, maintaining a humidity level of around 60% that adds a touch of crispness to the warm air. Ideal for outdoor adventures, Clanwilliam's December weather exudes a captivating charm that attracts both locals and visitors alike.
In December, Clanwilliam, South Africa, experiences a delightful warm spell, marking the transition into the height of summer. With temperatures ranging from a comfortable minimum of 6°C (44°F) to a sizzling maximum of 39°C (102°F), the average settles at a pleasant 21°C (70°F). This month heralds a slight uptick in nighttime warmth compared to previous months, while daytime temperatures soar, echoing the trend of increasing heat as the year progresses. As residents and visitors alike bask in the sunshine, the vibrant energy of the town comes alive, making December a perfect time to enjoy the great outdoors and the natural beauty that surrounds this charming region.
In December, Clanwilliam experiences a modest precipitation total of 16 mm (0.6 in), typically spread over just two days. This marks a slight decline compared to earlier months like May and June, which see significantly higher rainfall. The December weather transitions towards the drier summer months, reflecting a general pattern of decreasing precipitation as the year draws to a close. Despite this reduction, the rainfall is essential for maintaining the region's ecological balance and providing moisture to the verdant landscapes that characterize Clanwilliam during the summer.
In Clanwilliam, South Africa, December marks the end of a gradual decline in humidity levels as the year comes to a close. Starting from the humid highs of 82% in June and July, the trend sees a steady decrease, reaching 60% in December. This drop can be attributed to the transition from the cooler winter months into the warmer, drier summer season, where early summer humidity starts to lessen. The overall pattern reveals a distinct ebb and flow of moisture throughout the year, with December experiencing one of the lowest humidity levels, providing the perfect balance for those enjoying the mild summer celebrations that characterize this vibrant region.
In December, Clanwilliam, South Africa, experiences an extreme UV Index of 15, marking a peak in sun exposure for the year. With a burn time of just 10 minutes, it's essential for residents and visitors alike to remain vigilant in their sun protection measures. This dramatic spike follows a consistent trend, with high UV levels dominating the summer months from November to January. As the year transitions towards cooler months, the UV Index typically tapers off, hitting its lowest in June and July at a moderate level of 4. For those planning outdoor activities, understanding the UV Index trends is crucial—especially when the numbers soar in December. Stay informed and protect your skin by checking the detailed Clanwilliam UV Index for the best practices in sun safety.
UV Risk Categories
December in Clanwilliam, South Africa, is a true delight, boasting an impressive 420 hours of sunshine—the highest of the year. As the year unfolds, sunshine hours exhibit a notable fluctuation; the months leading up to December steadily increase, starting from 298 hours in May and culminating in this radiant peak. The trend reflects a gradual enhancement of brightness, with October and November also showcasing substantial sun hours of 374 and 390, respectively. This sunny crescendo not only marks the start of summer but also invites residents and visitors alike to bask in the warmth and beauty of Clanwilliam’s December days.
In Clanwilliam, South Africa, December brings a pleasant transition into summer, with a 65% chance of sunny weather. This likelihood is an increase from the cooler months preceding it, where sunshine opportunities hover around the 62% mark from October to November. While the sunniest months are found at the beginning of the year—January and February boast impressive 91% and 90% chances, respectively—December stands out as a reliable precursor to the peak summer months ahead. As the year draws to a close, residents and visitors alike can anticipate a delightful blend of warmth and sunshine, making it an ideal time for outdoor activities in this charming corner of South Africa.
In Clanwilliam, South Africa, December ushers in the longest daylight duration of the year, with an impressive 14 hours of sunlight. This month stands out as the culmination of a gradual increase in daylight that begins in late spring and peaks just before the summer solstice. Throughout the year, daylight hours fluctuate, starting from 10 hours during the winter months of May through July, and steadily rising each month until December. The transformation is particularly notable as the year progresses, moving from shorter days of 11 hours in April and September to a vibrant 13 hours in both November and December. This pattern not only enhances the allure of December but also hints at the warmth and energy of summer that characterizes this beautiful region.
In December, Clanwilliam experiences a gentle breeze, with an average wind speed of 2.6 m/s (6 mph). As the year transitions toward summer, this wind speed shows a slight decrease from the month prior, reflecting a trend of gradual fluctuations in wind patterns throughout the year. From the consistent 2.8 m/s in January and October to the lighter gusts in April, the winds in Clanwilliam rarely exceed 2.9 m/s. This blend of mild breezes creates a comfortable atmosphere, perfect for enjoying the blooming landscapes that December heralds.
Weather in Clanwilliam varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Clanwilliam, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, the weather typically features a minimum temperature of 6°C (44°F) and an average of 21°C (70°F), while soaring to a maximum of 39°C (102°F). With only 16 mm (0.6 in) of precipitation spread over 2 days and humidity sitting at 60%, December offers a warm and relatively dry climate. In contrast, January sees a slight increase in temperatures, with a minimum of 9°C (48°F), an average of 23°C (74°F), and maintaining the same maximum of 39°C (102°F). January also brings a slight decrease in precipitation to 12 mm (0.5 in) over 2 days, accompanied by a modest rise in humidity to 62%. For more detailed insights on January's weather, check out Clanwilliam weather in January.
In December, temperatures in Clanwilliam range from a mild minimum of 6°C (44°F) to a maximum of 39°C (102°F), with an average temperature of 21°C (70°F). The month sees a bit more precipitation at 16 mm (0.6 in) over 2 days, accompanied by humidity levels around 60%. In contrast, February experiences warmer conditions, with a minimum temperature of 10°C (50°F) and an average of 24°C (75°F), while still reaching highs of 39°C (102°F). This month is considerably drier, with only 4 mm (0.2 in) of rainfall on just 1 day, and humidity slightly increases to 62%. For a detailed look at February's climate, visit Clanwilliam weather in February.
In December, the weather typically features a minimum temperature of 6°C (44°F) and climbs to a maximum of 39°C (102°F), with an average temperature of 21°C (70°F). The month experiences minimal precipitation at 16 mm (0.6 in) over just two days, and the humidity sits at around 60%. In contrast, March exhibits slightly milder conditions, with lows around 8°C (47°F) and highs reaching 38°C (101°F), while maintaining an average temperature of 21°C (71°F). Precipitation is slightly higher at 18 mm (0.7 in) over the same two days, accompanied by increased humidity at 70%. For those interested in detailed information about March's weather, check out Clanwilliam weather in March.
When comparing December and April weather in Clanwilliam, both months showcase a warm climate, but with distinct characteristics. December features a higher average maximum temperature of 39°C (102°F), while April has a slightly lower maximum of 36°C (96°F). Though December has minimal precipitation of 16 mm (0.6 in) over just 2 days, April sees a little less rainfall at 14 mm (0.5 in) but over 3 days, suggesting a slight increase in humidity levels, with April at 72% compared to December's 60%. For more detailed insights, you can explore Clanwilliam weather in April.
In December, the weather is characterized by significantly warmer temperatures, with minimums around 6°C (44°F) and maximums reaching up to 39°C (102°F), while May experiences cooler temperatures, ranging from a minimum of 3°C (38°F) to a maximum of 31°C (89°F). December is relatively dry with only 16 mm (0.6 in) of precipitation over just 2 days, compared to May, which sees a higher total of 32 mm (1.2 in) spread over 4 days. Additionally, humidity levels are elevated in May at 77%, compared to the drier conditions of December with a 60% humidity level. For more detailed insights on May weather specifically, you can visit Clanwilliam weather in May.
In December, the weather in Clanwilliam is considerably warmer, with temperatures ranging from a minimum of 6°C (44°F) to a scorching maximum of 39°C (102°F) and an average of 21°C (70°F). The month experiences relatively low precipitation, with only 16 mm (0.6 in) over just two days, and a humidity level of 60%. In contrast, June brings a much cooler climate, with temperatures dipping down to a minimum of -1°C (31°F) and reaching up to 29°C (84°F), averaging at 12°C (54°F). This month is also wetter, with 66 mm (2.6 in) of rainfall spread out over eight days and a higher humidity of 82%. For more detailed information, check out Clanwilliam weather in June.
December and July showcase contrasting weather patterns. December experiences much warmer temperatures, with a minimum of 6°C (44°F) rising to a scorching maximum of 39°C (102°F), while July presents a cooler climate, where temperatures range from a low of -2°C (29°F) to a high of 27°C (81°F). Precipitation also varies significantly; December has only 16 mm (0.6 in) of rain over just 2 days, compared to July's wetter conditions, which see 63 mm (2.5 in) of rain over 6 days. Furthermore, July is characterized by higher humidity at 82%, in contrast to the more moderate humidity of 60% in December. For a more detailed look at July, check out Clanwilliam weather in July.
In comparing the weather of December and August, December emerges as a much warmer month, with temperatures soaring from a minimum of 6°C (44°F) to a maximum of 39°C (102°F), while the average temperature settles at 21°C (70°F). In contrast, August experiences a chillier climate, with temperatures ranging from a minimum of -2°C (29°F) to a maximum of 28°C (83°F) and an average of 11°C (51°F). Additionally, December sees significantly lower precipitation, with only 16 mm (0.6 in) over just two days, compared to August's 37 mm (1.4 in) falling over seven days. The humidity also varies, sitting at 60% in December, while August boasts a higher level of 78%, contributing to a more damp feeling during that month. For further details, you can check Clanwilliam weather in August.
When comparing the weather between December and September, we see notable differences in temperature and humidity. December boasts a warmer climate, with minimum temperatures around 6°C (44°F) and maximums reaching up to 39°C (102°F), while September's temperatures range from a chilly 0°C (33°F) to a maximum of 34°C (93°F). Additionally, September is marked by higher humidity levels at 74% compared to December's 60%. Precipitation is relatively low in both months, with December receiving 16 mm (0.6 in) over 2 days and September slightly higher at 19 mm (0.7 in) spread over 4 days. For more detailed insights, you can visit Clanwilliam weather in September.
In comparing the weather of December and October, it's clear that December tends to be warmer overall, with average temperatures reaching 21°C (70°F) compared to October's 17°C (63°F). While both months experience high temperatures, December sees a maximum of 39°C (102°F), slightly surpassing October's maximum of 38°C (101°F). Precipitation is slightly less in December, with just 16 mm (0.6 in) over 2 days, compared to October's 21 mm (0.8 in) over 4 days, indicating that October is a bit wetter. Additionally, October has a higher humidity level at 67%, compared to December's 60%, reflecting a more comfortable feel during that month. For more detailed insights, check Clanwilliam weather in October.
In comparing December and November weather, December exhibits slightly warmer temperatures overall, with averages of 21°C (70°F) compared to November's 19°C (67°F). The minimum temperatures are also marginally higher, while the maximums peak at 39°C (102°F) in December, just above November's maximum of 37°C (99°F). Rainfall decreases in December to 16 mm (0.6 in) over just 2 days, while November sees 23 mm (0.9 in) spread across 3 days. Humidity levels remain fairly consistent between the two months, with December at 60% and November at 61%. For more details on the climate during this time, you can visit Clanwilliam weather in November.
In December, Clanwilliam unfolds a tapestry of warmth and vibrancy, with temperatures soaring to a maximum of 39°C (102°F) while enjoying a delightful average of 21°C (70°F). Unlike the cooler months of the year, this period is characterized by less precipitation, receiving only 16 mm (0.6 in) across a couple of days, allowing residents and visitors to revel in the sunny outdoors. The humidity levels settle at a comfortable 60%, offering a pleasant balance amid the heat. Whether you're exploring nature or soaking up the festive atmosphere, December stands out as a month of lively contrast. For a more detailed look at the annual weather patterns, visit Clanwilliam Climate.