Last updated: March 17, 2025
August in Cardiff, United Kingdom presents a delightful blend of warm temperatures and occasional rainfall. With maximum temperatures reaching 29°C (84°F) and an average of 17°C (62°F), the month is characterized by a pleasant summer ambiance. However, visitors should be prepared for 13 days of rain, accumulating to 97 mm (3.8 in), and a relatively high humidity level of 73% that can make the air feel stickier. Whether you're exploring the vibrant city or enjoying its lush green parks, August offers a unique British summer experience, balancing sunny days with refreshing showers.
In August, Cardiff experiences a delightful peak in temperatures, with minimums around 9°C (48°F) and soaring maximums reaching up to 29°C (84°F). The average temperature settles at a comfortable 17°C (62°F), reflecting a warm embrace as summer winds down. This month stands out not only for its higher temperatures but also for the smooth transition from the mild warmth of July, making it an ideal time for outdoor activities and exploration. As the sun shines brightly, locals and visitors alike enjoy the vibrant atmosphere of the city, savoring long evenings and the last whispers of summer before the cooler months approach.
In August, Cardiff experiences a continuation of its typically wet summer, with an average precipitation total of 97 mm (3.8 in) over 13 days. This amount aligns closely with the city's rainfall patterns from previous months, reflecting a stable trend of summer dampness, which sees precipitation slightly below the heavier downpours often associated with autumn. As the season transitions to September, the rainfall begins to taper off, yet August maintains a notable level of moisture, contributing to the lush greenery that characterizes the region. Historically, August's rainfall serves as a precursor to the wetter months ahead, setting the stage for the 135 mm (5.3 in) average expected in October.
In August, Cardiff experiences a noticeable dip in humidity, with levels averaging around 73%. This marks a continuation of the downward trend from the peak of 88% in January, slowly easing to 70% in July. The month of August serves as a transitional period, hinting at the humidity's gradual increase as summer gives way to autumn. While still relatively high, the humidity levels in August are among the lowest of the year, providing a brief respite before they climb again in September and soar to 89% by October. This pattern emphasizes Cardiff’s wet climate, with high humidity returning as the seasons shift, enveloping the city once more in its characteristic dampness.
In August, Cardiff experiences a UV Index of 7, placing it in the high exposure category, with a recommended burn time of just 25 minutes. This represents a slight decrease from July's peak of 8, which indicates very high exposure; however, August still signals strong sun protection needs. As summer comes to a close, UV levels remain notably elevated compared to earlier months, such as March with a moderate index of 4 and January's low of just 1. Citizens and visitors alike should be aware of these trends to ensure proper sun safety measures are in place while enjoying the warm summer days. For more detailed insights, check out the full report on the Cardiff UV Index.
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In Cardiff, the month of August gifts residents with a delightful 345 hours of sunshine, a testament to the city's peak summer charm. This abundance of sunlight follows a pattern established in the preceding months, where the longest days of summer are on full display, building on the 399 hours seen in July. Although August's sunshine slightly diminishes, it still ranks as one of the more luminous months, outshined only by the height of summer. As the year shifts toward autumn, sunlight begins to retreat, with September showing a notable drop to 279 hours. This gentle transition underscores how Cardiff's summer shines brightly, encouraging outdoor adventures and sun-soaked gatherings before the shorter days of fall settle in.
In August, Cardiff experiences a 30% chance of sunny weather, marking a slight dip from the warmer July, which boasts a 41% likelihood of sunshine. This transition reflects a general pattern as summer days gradually give way to the milder, more unpredictable conditions of early autumn. Interestingly, while August sees more sun than several winter months—such as January (21%) and October (21%)—it remains below the peak sun levels of spring, notably April, where the chance of sun leaps to 52%. As summer winds down, residents and visitors alike may find August offers a comfortable blend of warm days and intermittent sunshine, perfect for outdoor activities before the season turns.
In August, Cardiff basks in an impressive 14 hours of daylight, a delightful continuation of the summer's abundant sunlight. This month marks a gradual decline from the peak brightness of 16 hours seen in both June and July, yet still offers ample opportunities for outdoor activities and late-night strolls. The transition into fall begins as daylight hours wane, diminishing to 12 hours by September, reminding us of the seasonal shift. Overall, the progression from the short days of January to the long, vibrant days of summer illustrates Cardiff's dynamic and evolving daylight landscape throughout the year.
As summer wanes in Cardiff, August offers a gentle transition with an average wind speed of 4.2 m/s (9 mph). This slight increase from the calmer July winds reflects a gradual shift in the season, encouraging outdoor activities as the breeze stirs the warm air. The average speeds in August fall between the brisk gusts of earlier months like January and February, which peak at 5.1 m/s (11 mph) and 5.7 m/s (13 mph), and the lighter breezes that characterize the later autumn months. With the wind beginning to pick up again in October at 4.8 m/s (11 mph), August stands as a pivotal point, marking a serene yet invigorating period in the midst of Cardiff's dynamic weather year.
The weather in Cardiff changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of August's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Cardiff and find detailed weather information for every month.
August and January showcase distinctly different weather patterns. In August, temperatures range from a minimum of 9°C (48°F) to a maximum of 29°C (84°F), with an average of 17°C (62°F). This month also experiences relatively high humidity at 73% and significant rainfall, totaling 97 mm (3.8 in) across about 13 days. In contrast, January features much cooler temperatures, with a minimum of -3°C (27°F) and a maximum of 13°C (56°F), averaging around 6°C (42°F). Although January has slightly less precipitation at 75 mm (3.0 in) over 12 days, it comes with a higher humidity level of 88%. For a more detailed look at January's weather, visit Cardiff weather in January.
August and February exhibit contrasting weather patterns. In August, temperatures range from a mild 9°C (48°F) at night to a warm 29°C (84°F) during the day, with an average of 17°C (62°F). The month sees around 97 mm (3.8 in) of precipitation over 13 days, accompanied by a humidity level of 73%. In contrast, February experiences colder conditions, with temperatures dipping as low as -4°C (26°F) and peaking at 15°C (60°F), averaging just 6°C (44°F). Although February has slightly higher precipitation at 101 mm (4.0 in) across 14 days, the humidity is notably higher at 88%. For more detailed insights, visit Cardiff weather in February.
When comparing the weather in August and March, a few notable differences arise. August typically boasts warmer temperatures, with a minimum of 9°C (48°F) and a maximum of 29°C (84°F), while March experiences chillier conditions, ranging from a low of -5°C (22°F) to a high of 18°C (65°F). Both months receive similar levels of precipitation, around 97 mm (3.8 in), but August tends to have fewer rainy days (13) compared to March's 15 days of rainfall. Additionally, March is characterized by higher humidity levels at 86%, compared to August's 73%. For more specific details about the weather in March, you can explore Cardiff weather in March.
When comparing the weather between August and April, it's clear that August is significantly warmer. In August, temperatures range from a minimum of 9°C (48°F) to a maximum of 29°C (84°F), with an average temperature of 17°C (62°F). In contrast, April experiences cooler temperatures, with a minimum of -1°C (30°F) and a maximum of 20°C (69°F), averaging just 9°C (49°F). Precipitation is also higher in August at 97 mm (3.8 in) over 13 days, compared to April's 57 mm (2.2 in) across 10 days. Moreover, April has a higher humidity level at 84%, compared to 73% in August. For more details on the weather in April, you can visit Cardiff weather in April.
When comparing the weather in August and May, August tends to be warmer, boasting average temperatures around 17°C (62°F) with a maximum of 29°C (84°F), while May's average is cooler at 12°C (54°F) and peaks at 24°C (76°F). Despite August's higher temperatures, it also experiences more rainfall, with 97 mm (3.8 in) over 13 days compared to May's 79 mm (3.1 in) over 12 days. Additionally, humidity levels are slightly higher in May at 80% compared to August's 73%. For those interested in more details, here's a link to explore Cardiff weather in May.
In comparing the weather of August and June, it is evident that August tends to be warmer overall, with average temperatures reaching 17°C (62°F) compared to June's average of 15°C (60°F). While both months experience mild minimum temperatures, August sees a maximum of 29°C (84°F), slightly higher than June's maximum of 27°C (82°F). Additionally, August has slightly more precipitation, totaling 97 mm (3.8 in) over 13 days, compared to June's 84 mm (3.3 in) over 12 days. Humidity levels are also noteworthy; August has a humidity of 73%, while June is a bit higher at 80%. For more detailed insights, you can refer to Cardiff weather in June.
In comparing the weather of August and July, August presents slightly warmer conditions with a maximum temperature of 29°C (84°F) compared to July's 28°C (82°F). Both months share the same minimum temperature of 9°C (48°F) and an average temperature very close, with August averaging 17°C (62°F) and July at 17°C (63°F). August experiences more precipitation, totaling 97 mm (3.8 in) over 13 days, while July has slightly less at 85 mm (3.3 in) over 12 days. Additionally, humidity is a bit higher in August at 73%, compared to 70% in July. For more details, you can check out Cardiff weather in July.
In August, temperatures in Cardiff range from a minimum of 9°C (48°F) to a maximum of 29°C (84°F), with an average of 17°C (62°F). The month is characterized by considerable precipitation, totaling 97 mm (3.8 in) over 13 days, alongside a humidity level of 73%. In comparison, September sees a slight drop in temperatures, with minimums of 4°C (40°F), maximums of 27°C (81°F), and an average of 15°C (59°F). Precipitation decreases slightly to 81 mm (3.2 in) over 12 days, while humidity rises slightly to 79%. For more detailed insights into the weather, you can check the Cardiff weather in September.
August weather typically features warmer temperatures, with a minimum of 9°C (48°F) and an average of 17°C (62°F), peaking at 29°C (84°F). In contrast, October sees cooler conditions, starting at a minimum of 1°C (33°F) and averaging 12°C (54°F), reaching a maximum of 21°C (70°F). Precipitation is more frequent in October, with 135 mm (5.3 in) over 16 days compared to August’s 97 mm (3.8 in) across 13 days, and the humidity also increases significantly to 89% in October from 73% in August. For more details on October weather, check out Cardiff weather in October.
August and November present stark contrasts in weather. August generally enjoys milder temperatures, ranging from a minimum of 9°C (48°F) to a maximum of 29°C (84°F) and an average of 17°C (62°F). In contrast, November brings cooler conditions, with temperatures dipping as low as -1°C (30°F) and peaking at 16°C (61°F), averaging just 9°C (48°F). Both months experience considerable precipitation—August sees 97 mm (3.8 in) over 13 days, while November has slightly more at 99 mm (3.9 in) across 15 days. Additionally, November's humidity is higher at 90%, compared to 73% in August, making the air feel even chillier. For more details on November's weather, check out Cardiff weather in November.
August and December present striking contrasts in weather. In August, temperatures range from a mild 9°C (48°F) to a warm 29°C (84°F), with an average of 17°C (62°F). The month experiences around 97 mm (3.8 in) of precipitation over 13 rainy days, accompanied by a humidity level of 73%, creating a generally comfortable atmosphere. In contrast, December sees much colder conditions, with temperatures dropping to a minimum of -4°C (26°F) and peaking at 13°C (56°F), averaging just 7°C (45°F). The precipitation increases to 130 mm (5.1 in) over 17 days, with higher humidity at 89%, contributing to a damp and chilly feel. For more details on December’s typical weather, visit Cardiff weather in December.
August in Cardiff brings a noticeable warmth that sets it apart from the cooler months, with comfortable temperatures prompting outdoor adventures. Though the average temperature sits at a pleasant 17°C (62°F), the month can sometimes soar to a maximum of 29°C (84°F), making it one of the year's highlights for sunny days. While you might bask in the sunshine, be prepared for the occasional rainfall—97 mm across about 13 days reminds us that summer showers are still a part of the mix. The humidity also climbs to around 73%, adding a muggy feel on warmer days. For a deeper dive into Cardiff's yearly trends, check out Cardiff Climate.