Last updated: August 21, 2025
Experience the charm of Castel, Guernsey in August, where temperatures dance between a pleasant maximum of 22°C (72°F) and a cozy minimum of 14°C (57°F), averaging around 17°C (63°F). This month comes with a hint of moisture, featuring around 50 mm (2.0 in) of precipitation across 9 rainy days, creating a lush landscape. With humidity levels at a comfortable 71%, the weather offers a perfect blend for enjoying outdoor pursuits, while the occasional shower brings a refreshing twist to your summer adventures. Embrace the vibrant atmosphere of Guernsey under its variable skies!
In August, Castel, Guernsey experiences delightful summer warmth, with temperatures reflecting a pleasant shift from earlier months. The average temperature hovers around 17°C (63°F), showcasing a notable rise from the cooler depths of winter. The minimum and maximum values, at 14°C (57°F) and 22°C (72°F) respectively, indicate that this month is one of the warmest of the year. This warmth, coupled with the gradual increase seen since June, highlights August as a peak summer month, perfect for enjoying the island's stunning coastal scenery and vibrant outdoor activities. As the season transitions into September, temperatures remain inviting, suggesting that the summer vibe lingers a little longer in this charming corner of the Channel Islands.
In August, Castel, Guernsey experiences a moderate precipitation total of 50 mm (2.0 in), marking a brief respite from the heavier rains that characterize the later months of the year. This amount falls comfortably between the more arid summer months of July, which sees just 37 mm (1.5 in), and the wetter September with 63 mm (2.5 in). The 9 days of precipitation in August suggest a balanced mix of sun and showers, maintaining the lush greenery typical of late summer. As the season transitions, it becomes evident that while August may not be the rainiest, it still plays a crucial role in setting the stage for the wetter months ahead, with significant increases noted in October's staggering 144 mm (5.7 in). Overall, August strikes a harmonious balance, providing much-needed moisture without overwhelming the outdoor activities of the season.
In Castel, Guernsey, August marks a notable shift in humidity levels, with figures settling at 71%. This represents a slight increase from July's comparatively drier 63%, indicating a transition as summer gives way to early autumn. The trend throughout the year reveals a peak of humidity in the winter months, particularly in January and November, both hovering around 89% to 90%. As the seasons progress, there is a gradual decline in humidity from the spring months, reaching its lowest point in July. However, August's humidity suggests that while the summer heat may be waning, the air retains a comfortable level of moisture, setting the stage for the wetter months that follow.
In August, Castel experiences a UV Index of 7, categorized as high, indicating a need for caution during sun exposure with a burn time of 25 minutes. As summer peaks, the UV Index remains robust, although slightly lower than the previous month, suggesting that while outdoor activities are inviting, protective measures like sunscreen and hats are still crucial. This trend reflects the overall seasonal pattern, with UV levels gradually decreasing from the intense highs of June and July, yet still demanding attention as we move towards autumn. For more information on understanding UV levels and their implications, visit Castel UV Index.
UV Risk Categories
August in Castel, Guernsey boasts a delightful 396 hours of sunshine, making it one of the sunniest months of the year. This vibrant summer bliss follows a peak in July, where the sunlight almost reached the maximum, with 436 hours illuminating the days. Interestingly, the summer months show a clear trend of abundant sunshine, with May and June also seeing impressive totals of 414 and 416 hours, respectively. As the warm brilliance of August gives way to September's 338 hours, the gradual decline in daylight hours marks a transition towards the cooler months, echoing the dance of the seasons in this picturesque locale. With its rich sunlight, August stands as a golden bridge between the height of summer and the approaching autumn.
In August, residents and visitors of Castel, Guernsey can anticipate a 42% chance of sunny weather, which reflects a slight dip from the previous month but remains relatively favorable. This trend showcases a pattern where the likelihood of sunshine peaks in April with 62% before tapering off through the summer months. Following the warm, sun-soaked weeks of July, the somewhat lower percentage in August suggests a transition towards autumn, despite still promising ample opportunities for outdoor enjoyment. As summer begins to fade, the 43% chance of sun in September indicates that while the sunny days are drawing to a close, they are not entirely out of the picture just yet. Overall, August strikes a balance, offering both warmth and a fair share of bright moments.
As the summer peaks, Castel, Guernsey basks in 14 hours of daylight in August, showcasing a slight decline from the longest days of June, which offer a radiant 16 hours. This gradual transition reflects the waning warmth of summer, as daylight hours begin to shorten with September's arrival, dipping to 12 hours. The trend reveals a pattern of increasing daylight from the depths of winter, where just 8 hours grace the skies in January, leading up to the brighter months of spring and summer. As August provides a bridge between the sun-drenched days of summer and the cooler tones of autumn, its generous daylight continues to offer residents and visitors alike ample opportunity to enjoy the stunning landscapes of Guernsey before the days begin to wane further.
In August, Castel experiences a notable shift in wind patterns, with an average speed of 6.6 m/s (15 mph). This marks a slight increase from the calmer summer months of June and July, where winds dipped to 4.6 m/s (10 mph) and 6.0 m/s (13 mph), respectively. As the summer wanes, the winds begin to pick up again, foreshadowing the more blustery conditions of September and October that typically range from 6.1 m/s (14 mph) to 8.2 m/s (18 mph). The pattern reveals a transition from the gentle breezes of mid-summer to the invigorating winds that herald the arrival of autumn, making August a time of palpable change in the coastal air of Guernsey.
Weather in Castel varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Castel, focusing on differences in temperature, rainfall, humidity, and UV levels.
August generally offers milder and more pleasant weather compared to January. With temperatures ranging from a minimum of 14°C (57°F) to a maximum of 22°C (72°F), August sees an average temperature of 17°C (63°F). In contrast, January experiences significantly cooler conditions, with temperatures ranging from 3°C (37°F) to 14°C (57°F) and an average of just 9°C (49°F). Precipitation is also a notable difference; while August sees about 50 mm (2.0 in) over approximately 9 rainy days, January receives a higher total of 94 mm (3.7 in) spread across 14 rainy days. Additionally, humidity levels are higher in January at 89%, compared to 71% in August. For more details on January weather, you can check Castel weather in January.
August and February exhibit stark contrasts in weather patterns. In August, temperatures are relatively mild, with averages around 17°C (63°F) and peaks reaching 22°C (72°F), accompanied by moderate rainfall of 50 mm (2.0 in) over about 9 days and a humidity level of 71%. In contrast, February experiences much colder conditions, with average temperatures dropping to 9°C (48°F) and max temperatures only reaching 13°C (56°F). This month also sees higher precipitation at 86 mm (3.4 in), spread over 16 days, and humidity levels rise to 88%. For more details on February weather, visit Castel weather in February.
In August, the weather is generally milder with temperatures ranging from a minimum of 14°C (57°F) to a maximum of 22°C (72°F), averaging around 17°C (63°F). The month sees about 50 mm (2.0 in) of precipitation over approximately 9 days, with a humidity level of 71%. In contrast, March experiences cooler temperatures, with a minimum of 0°C (32°F) and a maximum of 13°C (55°F), averaging just 9°C (49°F). This month receives more precipitation, totaling 73 mm (2.9 in) across 15 days, and a higher humidity level of 85%. For a more detailed look at March conditions, you can visit Castel weather in March.
When comparing the weather in April and August, notable differences emerge. April experiences cooler temperatures, with an average of 10°C (50°F) and maximums reaching only 15°C (59°F). In contrast, August boasts a warmer atmosphere, where average temperatures rise to 17°C (63°F) and can peak at 22°C (72°F). Precipitation is slightly less in August, totaling 50 mm (2.0 in) over 9 days compared to April's 34 mm (1.3 in) over 8 days, indicating that April tends to be a bit wetter despite having a similar number of rainy days. Additionally, humidity levels are higher in April at 84%, compared to 71% in August, contributing to a different feel in the air. For more details on April weather, you can visit Castel weather in April.
August generally experiences warmer temperatures compared to May, with average highs reaching around 22°C (72°F) in August, compared to May's maximum of 18°C (65°F). The minimum temperature in August is significantly higher, starting at 14°C (57°F), while May's lowest temperature is only 7°C (45°F). Precipitation levels are slightly lower in August, totaling 50 mm (2.0 in) over 9 days, compared to May's 55 mm (2.2 in) over 8 days. However, August tends to be more humid, averaging 71% compared to May's 81%. For a closer look at May weather, visit Castel weather in May.
Comparing the weather in August and June reveals some notable differences. August tends to be warmer, with average temperatures reaching 17°C (63°F) compared to June's average of 14°C (58°F). The maximum temperature in August can rise to 22°C (72°F), whereas in June, it peaks at 19°C (67°F). Despite August having slightly less precipitation at 50 mm (2.0 in) over about 9 days, the humidity level is lower at 71% than June's 77%. For more detailed information about the weather in June, you can visit Castel weather in June.
Comparing the weather in August to July, we observe slightly warmer temperatures in August, with average highs reaching 22°C (72°F) compared to July's maximum of 21°C (70°F). Both months share the same minimum temperature of 14°C (57°F), but August's average temperature is a touch higher at 17°C (63°F) versus July's 16°C (62°F). Precipitation in August increases to 50 mm (2.0 in) over 9 days, while July records less rainfall at 37 mm (1.5 in) over 7 days. Additionally, August is more humid, with humidity levels rising to 71%, compared to July's 63%. For more details on July's weather, check out Castel weather in July.
August and September share similar average temperatures, with August averaging 17°C (63°F) and September maintaining the same average but with a slight dip in maximum temperature to 21°C (71°F). While both months experience approximately 9 days of rainfall, September sees a higher total precipitation of 63 mm (2.5 in) compared to August's 50 mm (2.0 in). Additionally, humidity levels rise slightly in September to 76%, up from August's 71%. For more detailed insights, you can explore the weather specifics here: Castel weather in September.
August and October present a notable contrast in weather conditions. In August, temperatures range from a mild 14°C (57°F) to a pleasant 22°C (72°F), with relatively low precipitation of 50 mm (2.0 in) over about 9 days. The humidity sits at a comfortable 71%. In contrast, October sees temperatures drop, with a minimum of 9°C (48°F) and a maximum of 20°C (68°F), while experiencing significantly higher rainfall of 144 mm (5.7 in) over 17 days and increased humidity at 89%. This shift highlights the transition from late summer warmth to the cooler, wetter conditions typical of autumn. For more details on the weather in October, check out Castel weather in October.
August and November showcase distinct differences in weather patterns. In August, temperatures range from a mild minimum of 14°C (57°F) to a comfortable maximum of 22°C (72°F), accompanied by an average temperature of 17°C (63°F). The month sees moderate precipitation at 50 mm (2.0 in) over about 9 days, with humidity levels at 71%. In contrast, November experiences cooler weather, with temperatures dropping to a minimum of 6°C (43°F) and peaking at 17°C (63°F), averaging 12°C (54°F). This month is significantly wetter, receiving 126 mm (5.0 in) of rain over 18 days, along with higher humidity at 90%. For more insights into November weather in Castel, visit Castel weather in November.
The weather in August is notably warmer compared to December, with temperatures ranging from a minimum of 14°C (57°F) to a maximum of 22°C (72°F). In contrast, December's temperatures drop significantly, averaging between 5°C (41°F) and 14°C (58°F). Additionally, December experiences much heavier rainfall, with 163 mm (6.4 in) observed over 21 days, compared to August's 50 mm (2.0 in) over just 9 days. The humidity also rises in December, reaching 90%, compared to August's 71%. For more detailed information about December weather, you can check Castel weather in December.
August in Castel offers a delightful blend of warmth and mildness, marked by comfortable temperatures that make it stand out from the cooler months. With an average temperature hovering around 17°C, the summer days are pleasantly warm, occasionally peaking at 22°C. However, it’s not all sun—expect some rain with about nine days of precipitation, which contributes to the region's lush greenery. With humidity levels at 71%, the air has a refreshing quality, creating a vibrant atmosphere. This month serves as a perfect transition from the warmth of summer into the mildness of autumn, making it an ideal time to explore the beauty of Castel. For more detailed insights, visit Castel Climate.