Last updated: August 21, 2025
In August, Castletown, Isle of Man, experiences moderate temperatures, with a maximum reaching 18°C (65°F) and an average of 15°C (59°F), while the minimum dips to a comfortable 12°C (54°F). Visitors can expect a fairly wet month, with an overall precipitation total of 94 mm (3.7 in) spread across 15 rainy days. Humidity levels hover around 79%, contributing to the lush landscapes that characterize this charming coastal town. Whether basking in the cool coastal breeze or enjoying the vibrant greenery, August in Castletown offers a delightful blend of summer warmth and refreshing showers.
In August, temperatures in Castletown, Isle of Man reach a pleasant peak as summer begins to wind down. With a minimum of 12°C (54°F) and an average of 15°C (59°F), visitors can enjoy comfortably mild days. The high temperature averages around 18°C (65°F), making this month one of the warmest of the year. Compared to the preceding months, August maintains a steady warmth, continuing the upward trend established in July. These inviting temperatures provide the perfect backdrop for exploring the island’s rich history and stunning landscapes, all while enjoying the lingering warmth of summer before the cooler autumn days arrive.
In August, Castletown experiences a significant uptick in precipitation, with 94 mm (3.7 in) of rain falling over approximately 15 days. This marks a noticeable increase from the drier summer months of June and July, each receiving 70 mm (2.8 in) but with fewer rainy days. August's rainfall sets the stage for the transition into the wetter autumn months, as it paves the way for September's 91 mm (3.6 in) and the even heavier downpours that follow in October and November. This pattern highlights the Isle of Man's shift from relatively moderate summer showers to the more persistent rainfall typical of the fall season, reminding residents and visitors alike of the island's changeable climate.
In August, Castletown, Isle of Man experiences a humidity level of 79%, reflecting a slight increase from the drier summer months of June and July. This modest rise in humidity signals a transition towards the wetter conditions of autumn, as evidenced by the subsequent months. Over the year, humidity levels peak in the colder months of November and December, illustrating the island's tendency for higher moisture during winter. Overall, the data reveals a gradual decline from the height of winter humidity, with August sitting comfortably in the middle of the year's spectrum—balancing the warmth of summer with the approaching chill of fall.
In August, Castletown enjoys a high UV Index of 7, with an estimated burn time of 25 minutes for those with fair skin. This marks a slight decrease from the peak UV levels seen in June and July, where the index reached 8, categorized as very high. As summer wanes, residents and visitors should still be vigilant about sun exposure, despite the shorter burn time compared to earlier months. The trend throughout the year shows a gradual rise from low levels in winter to more intense rays in summer, emphasizing the importance of sun protection during these peak months. For detailed information about UV levels year-round, you can check out the Castletown UV Index.
UV Risk Categories
August in Castletown, Isle of Man, brings a vibrant warmth with 376 sunshine hours, wrapping up the summer season on a blissful note. This month follows the peak brightness of May and July, where the sun graced the town with an impressive 418 hours each. As the summer sun gradually wanes, August still holds its own, offering a pleasant contrast to the earlier months of the year, which start with a mere 90 hours in January. The trend observed highlights a steady increase in sunshine as the year progresses, peaking in mid-summer before embarking on a gentle decline into autumn. This delightful summer light not only enhances the landscape but invigorates the community, creating the perfect atmosphere for outdoor activities and exploration.
In Castletown, Isle of Man, the likelihood of sunny weather in August sits at a modest 29%, reflecting a trend of fluctuating sunshine throughout the year. Following a brief uplift in April with a promising 52%, the summer months become a mixed bag, with July and August both showing a consistent but unremarkable chance of sun at 40% and 29% respectively. This suggests that while August may still offer opportunities for pleasant weather, it's wise to temper expectations as the sunny days become less predictable towards the late summer. Overall, visitors should prepare for a blend of both sunny and overcast, honing in on the peak of the season while remaining ready for the island's characteristic variable climate.
In August, Castletown, Isle of Man, enjoys a generous 14 hours of daylight, marking a gentle decline from the peak of 17 hours in June. This month gracefully bridges the vibrant long days of summer and the shorter ones of autumn. After the lengthy daylight of May and June, where residents basked in up to 16 hours, August signals the beginning of transition, as days gradually shorten. Following this midpoint, September brings a further reduction to 12 hours, hinting at the cooler days ahead. The waning daylight of August invites a sense of reflection and appreciation for the warm summer evenings, making it a perfect time for both outdoor adventures and cozy gatherings as the season shifts.
In August, the wind in Castletown, Isle of Man blows gently, with an average speed of 5.7 m/s (13 mph). This slight increase from the calmest month of July (4.3 m/s) hints at a seasonal transition, as the winds begin to pick up momentum in anticipation of autumn. Notably, the summer months generally present milder breezes, with wind speeds peaking in the cooler days of October and November, both clocking in at a brisk 9.3 m/s (21 mph). As we embrace the warmth of late summer, the August winds offer a refreshing, yet tranquil embrace, setting the stage for the more dynamic gusts that follow in the fall.
Weather in Castletown varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Castletown, focusing on differences in temperature, rainfall, humidity, and UV levels.
August and January exhibit striking differences in weather patterns. In August, temperatures range from a minimum of 12°C (54°F) to a maximum of 18°C (65°F), with an average of 15°C (59°F). The month experiences considerable rainfall, totaling 94 mm (3.7 in) over 15 rainy days and maintaining a humidity level of 79%. In contrast, January sees much cooler temperatures, with a minimum of 3°C (38°F) and a maximum of 13°C (56°F), averaging 8°C (46°F). While it has slightly less precipitation at 81 mm (3.2 in) across 14 days, January's humidity increases to 89%. For more detailed insights, you can check Castletown weather in January.
When comparing the weather in August and February, notable differences emerge. August typically experiences milder temperatures, with daily averages around 15°C (59°F) and maximums reaching 18°C (65°F). In contrast, February is significantly cooler, with average temperatures of 7°C (45°F) and highs only peaking at 12°C (54°F). Both months are characterized by substantial precipitation, with February receiving slightly more at 106 mm (4.2 in) over 18 days compared to August's 94 mm (3.7 in) over 15 days. Additionally, February boasts higher humidity levels at 88%, in contrast to August's 79%. For more detailed information, you can check Castletown weather in February.
August and March present contrasting weather conditions. In August, temperatures range from a mild 12°C (54°F) to a pleasant maximum of 18°C (65°F), with an average of 15°C (59°F). The month experiences significant humidity at 79%, coupled with 94 mm (3.7 in) of rainfall over approximately 15 days. In contrast, March is much colder, with temperatures ranging from a minimum of -1°C (30°F) to a maximum of only 11°C (52°F) and an average of 7°C (45°F). Although precipitation is slightly lower at 87 mm (3.4 in), it occurs over more days, totaling 18. The humidity is also notably higher in March at 86%, which can make the chill feel even more pronounced. For more detailed information on March weather, you can visit Castletown weather in March.
In comparing the weather between August and April, notable differences emerge. August tends to be significantly warmer, with average temperatures ranging from a minimum of 12°C (54°F) to a maximum of 18°C (65°F), while April experiences cooler conditions with a range from 3°C (38°F) to 13°C (56°F). Additionally, August sees higher levels of precipitation at 94 mm (3.7 in) over approximately 15 days compared to April's 36 mm (1.4 in) spread across just 8 days. Humidity is somewhat consistent, lingering around 79% in August and slightly higher at 84% in April. For a more detailed look at April weather, you can explore Castletown weather in April.
When comparing the weather in August to that in May, we notice a significant difference in temperature and precipitation. August typically has a milder temperature range, with a minimum of 12°C (54°F), an average of 15°C (59°F), and a maximum of 18°C (65°F). In contrast, May starts cooler, with temperatures ranging from a minimum of 5°C (42°F) to a maximum of 16°C (60°F) and an average of 10°C (51°F). Additionally, August experiences higher precipitation levels, with 94 mm (3.7 in) spread over 15 days, compared to May's 44 mm (1.7 in) over just 9 days. Interestingly, humidity remains consistent between the two months at 79%. For more details on May’s weather, you can check Castletown weather in May.
When comparing August and June weather, we can see some notable differences in temperature and precipitation. August tends to be slightly warmer, with average temperatures ranging from a minimum of 12°C (54°F) to a maximum of 18°C (65°F), compared to June's range of 9°C (49°F) to 17°C (64°F). Additionally, August experiences more precipitation, averaging 94 mm (3.7 in) over 15 days, while June sees less rainfall at 70 mm (2.8 in) over 11 days. Interestingly, humidity levels are quite similar, with August at 79% and June at 81%. For more detailed information on the weather in June, you can visit Castletown weather in June.
In comparison, August experiences slightly warmer temperatures than July, with minimum temperatures around 12°C (54°F) and average highs reaching 18°C (65°F) in August, while July has average highs of 19°C (67°F). Precipitation also increases in August, with 94 mm (3.7 in) falling over 15 days, compared to July's 70 mm (2.8 in) over 12 days. However, both months share similar humidity levels, with August at 79% and July slightly lower at 78%. For a closer look at July's weather specifics, you can visit Castletown weather in July.
In comparing the weather of August and September, we see a gradual shift as summer transitions to autumn. August tends to be slightly warmer with average temperatures ranging from a minimum of 12°C (54°F) to a maximum of 18°C (65°F), while September has a cooler average with a minimum of 10°C (51°F) and an average high of 19°C (67°F). Precipitation levels are fairly similar, with August receiving 94 mm (3.7 in) over 15 days and September slightly less at 91 mm (3.6 in) across 14 days. Interestingly, humidity increases in September, averaging 85% compared to August's 79%. For a closer look at the weather specifics in September, you can visit Castletown weather in September.
August and October present distinctly different weather patterns. In August, temperatures range from a minimum of 12°C (54°F) to a maximum of 18°C (65°F), with an average of 15°C (59°F). While this month sees a fair amount of rain, with 94 mm (3.7 in) of precipitation spread over 15 days, the humidity level is slightly lower at 79%. In contrast, October experiences cooler temperatures, with a minimum of 7°C (45°F) and an average of 13°C (55°F), peaking at 17°C (63°F). Additionally, it is wetter, with precipitation totaling 142 mm (5.6 in) over 18 days, and humidity rises to 90%. For those interested in more specific weather conditions for October, you can explore Castletown weather in October.
August typically offers milder temperatures compared to November, with averages around 15°C (59°F) and maximums reaching 18°C (65°F). In contrast, November sees cooler temperatures, with an average of 10°C (51°F) and maximums peaking at 14°C (58°F). August experiences less precipitation, totaling 94 mm (3.7 in) over 15 days, whereas November is noticeably wetter, with 143 mm (5.6 in) of rain across 20 days. The humidity also increases in November, averaging 91% compared to August's 79%, making the latter feel more comfortable. For more detailed information on November weather, you can visit Castletown weather in November.
August and December in Castletown present contrasting weather patterns. August typically enjoys milder temperatures, with an average of 15°C (59°F) and a max of 18°C (65°F), while December sees cooler conditions with an average of 9°C (48°F) and a max of 13°C (56°F). Precipitation is also more frequent in December, with 144 mm (5.7 in) falling over 22 days compared to 94 mm (3.7 in) over 15 days in August. Additionally, humidity levels peak in December at 89%, slightly higher than August's 79%. For a more detailed look at December weather specifics, visit Castletown weather in December.
In August, Castletown experiences a unique blend of mild temperatures and increased precipitation, setting it apart from the summer months. While the average temperature hovers around a comfortable 15°C, the humidity levels rise to a notable 79%, creating a somewhat muggy atmosphere on certain days. This month also sees approximately 15 days of rain, contributing to a total of 94 mm of precipitation, which is distinctly higher than the preceding months. Such weather patterns provide a transitional feel as summer gives way to early autumn, making August an intriguing time to explore the lush landscapes of Castletown. For more detailed insights into the region's weather trends, visit Castletown Climate.