Last updated: August 21, 2025
In September, Port Saint Mary on the Isle of Man experiences a mild climate, with a maximum temperature reaching up to 19°C (67°F) and an average of 14°C (58°F). As the season transitions, the minimum temperature can dip to 10°C (51°F), providing a crisp backdrop for visitors and residents alike. This month sees a total precipitation of 91 mm (3.6 in), spread over approximately 14 days, leading to a noteworthy humidity level of 85%. Travelers should prepare for occasional showers while enjoying the refreshing coastal atmosphere that September offers in this charming locale.
As summer gives way to autumn, September in Port Saint Mary offers a delightful transition in temperatures. With minimums hovering around 10°C (51°F) and maximums reaching up to 19°C (67°F), the month wraps its visitors in a pleasant embrace, perfect for outdoor activities. The average temperature of 14°C (58°F) signals a comfortable climate, ideal for exploring the charming coastal scenery or enjoying leisurely strolls. Comparatively, September showcases a subtle warmth compared to the cooler months preceding it, making it a favored time to experience the island's beauty before the chill of winter sets in.
In September, Port Saint Mary experiences a notable shift in its weather patterns, with precipitation measuring 91 mm (3.6 in) over approximately 14 rainy days. This is an increase compared to the warmer summer months, such as August, which saw 94 mm (3.7 in) but over 15 days of rain. As autumn approaches, the island transitions into a wetter season, with precipitation levels forecasted to rise significantly in October and November, where they reach approximately 142 mm and 143 mm respectively. This trend highlights the gradual accumulation of rainfall as the year progresses, reflecting the Isle of Man's characteristic maritime climate, which is often synonymous with increased precipitation during the fall months.
In September, Port Saint Mary experiences a notable shift in humidity, with levels rising to 85%. This increase marks a departure from the summer’s lower readings, peaking in July at 78%. As the year transitions into autumn, humidity generally trends upward, reflecting the island's characteristic maritime climate. Following this month's relatively high humidity, the levels continue to climb, reaching a peak of 90% in October. Overall, the September humidity serves as a gentle reminder of the approaching seasonal change, bridging the gap between the mild warmth of summer and the cooler, moisture-laden fall months.
As September rolls in Port Saint Mary, the UV Index reflects a noticeable shift, settling at 5, which falls into the moderate exposure category. This marks a decrease from the high levels experienced in the peak summer months of July and August, where the Index soared to 8. With a burn time of 30 minutes, it’s essential to take precautions during this month, as the sun's intensity remains significant but manageable. This trend shows that while the harsh summer rays diminish, early autumn still demands attention to sun safety. For more detailed insights, visit Port Saint Mary UV Index.
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As summer gracefully yields to autumn in Port Saint Mary, September offers a delightful blend of warmth and light, boasting 314 hours of sunshine. This month marks a subtle shift in the weather pattern; while it doesn't quite reach the dazzling heights of May's 418 hours or July's peak, it still holds its own in the annual sunshine tally. The trend from the lavish summer months shows a gentle decline, yet September's light remains abundant compared to the dimmer winter months ahead, such as January's mere 90 hours. As the sun begins to set earlier, the golden days of September invite both locals and visitors to bask in the lingering warmth of a fading summer, serving as a charming prelude to the tranquil beauty of autumn.
In September, the chance of sunny weather in Port Saint Mary, Isle of Man, stands at a modest 24%, marking a noticeable dip compared to the warmer months. This trend reflects a broader pattern where the likelihood of sunshine increases from the dismal depths of winter before peaking in spring, with April showing the highest probability at 52%. Following this peak, the chance of sunny days gradually winds down throughout summer, ultimately leading into autumn's cooler embrace. As the vibrant summer fades, September offers a hint of nostalgia for brighter days, yet it's best to prepare for a more overcast experience as the sunniest days of the year recede.
As summer fades into autumn in Port Saint Mary, Isle of Man, September marks a gentle transition in daylight hours, offering about 12 hours of sunlight. This reduction follows the peak of June, where the long, sunlit days reached 17 hours. While the daylight diminishes from the brightness of summer with 16 hours in July and 14 hours in August, September maintains a still generous amount of light, allowing residents and visitors alike to savor the lingering warmth of the season. As the days shorten further into October and beyond, the gradual descent into winter serves as a reminder of nature’s rhythmic cycle, where each month brings its unique charm.
As summer gently transitions into autumn, September in Port Saint Mary, Isle of Man offers a delightful experience with an average wind speed of 6.0 m/s (13 mph). This month marks a slight uptick from the calmer breezes of July and August, reflecting a seasonal shift that hints at the approaching storms of winter. Throughout the year, the wind speeds tend to fluctuate, peaking during the colder months of October and November, where they reach around 9.3 m/s (21 mph). While April through August typically presents more subdued winds, September strikes a balance, providing just enough breeze to invigorate the landscape without overwhelming it. As the Isle of Man gears up for the brisk autumn months, the September winds serve as a gentle reminder of nature’s ongoing evolution.
Weather in Port Saint Mary varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Port Saint Mary, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present contrasting weather conditions in terms of temperature and humidity. In September, temperatures are milder, with averages around 14°C (58°F) and daily highs reaching up to 19°C (67°F). The month sees a total precipitation of 91 mm (3.6 in) over 14 days, accompanied by relatively high humidity at 85%. In contrast, January experiences cooler temperatures, averaging 8°C (46°F), with highs only reaching a maximum of 13°C (56°F). Despite slightly lower precipitation at 81 mm (3.2 in), the humidity rises to 89%, making January feel quite damp. For more details, you can visit Port Saint Mary weather in January.
September and February present quite contrasting weather patterns. In September, temperatures range from a minimum of 10°C (51°F) to a maximum of 19°C (67°F), with an average of 14°C (58°F). The month experiences significant rainfall, totaling 91 mm (3.6 in) over about 14 days, accompanied by relatively high humidity at 85%. In contrast, February is much cooler, with temperatures dipping to a minimum of 1°C (34°F) and peaking at 12°C (54°F), averaging only 7°C (45°F). This month sees even higher precipitation, averaging 106 mm (4.2 in) spread over 18 days, and the humidity rises slightly to 88%. For a detailed look at February weather, you can explore Port Saint Mary weather in February.
When comparing the weather in September and March, notable differences emerge. September typically experiences milder temperatures, with averages around 14°C (58°F) and highs reaching 19°C (67°F), while March is much cooler, averaging only 7°C (45°F) with a maximum of 11°C (52°F). Though both months see considerable precipitation, September receives 91 mm (3.6 in) over 14 days, whereas March has slightly less at 87 mm (3.4 in) over 18 days, indicating that March is a bit wetter despite being colder. Additionally, humidity levels remain high in both months, with September at 85% and March at 86%, contributing to a damp and chilly atmosphere in the early spring. For more detailed insights, check out Port Saint Mary weather in March.
When comparing the weather in September and April, there are notable differences in temperature and precipitation. September generally enjoys milder temperatures with averages around 14°C (58°F) and a maximum of 19°C (67°F), while April sees cooler conditions, with average temperatures of 8°C (47°F) and a max of only 13°C (56°F). In terms of rainfall, September experiences heavier precipitation with 91 mm (3.6 in) over about 14 days, compared to April's 36 mm (1.4 in) across 8 days. Both months exhibit high humidity, but September is slightly more humid at 85% compared to April's 84%. For a detailed look at April weather in Port Saint Mary, you can visit Port Saint Mary weather in April.
September and May exhibit distinct weather characteristics that reflect the changing seasons. In September, temperatures range from a minimum of 10°C (51°F) to a maximum of 19°C (67°F), with an average of 14°C (58°F). The month tends to be relatively wet, receiving about 91 mm (3.6 in) of precipitation over 14 days, and humidity levels are quite high at 85%. In contrast, May offers milder conditions with temperatures ranging from a minimum of 5°C (42°F) to a maximum of 16°C (60°F) and an average temperature of 10°C (51°F). Precipitation is lighter, at 44 mm (1.7 in), occurring over only 9 days, while humidity is somewhat lower at 79%. For more detailed insights on May weather, you can view Port Saint Mary weather in May.
In comparing the weather of September and June, we notice that September tends to be slightly warmer, with average temperatures reaching up to 14°C (58°F) and maximum highs of 19°C (67°F). In contrast, June has a cooler average temperature of 13°C (55°F), with maximums only reaching 17°C (64°F). Additionally, September experiences more precipitation, with 91 mm (3.6 in) falling over 14 days, compared to June's 70 mm (2.8 in) over 11 days. Both months exhibit high humidity levels, but September is marginally more humid at 85%, against June's 81%. For more detailed weather insights, you can check Port Saint Mary weather in June.
When comparing the weather in September to that of July, both months exhibit similar average temperatures, with July having a slightly higher minimum temperature of 12°C compared to September's 10°C. The maximum temperature remains consistent at 19°C for both months. However, September experiences more precipitation, totaling 91 mm over 14 days, while July has 70 mm over 12 days, indicating a wetter start to autumn. Additionally, humidity is notably higher in September at 85%, compared to 78% in July, contributing to a more humid and potentially cooler feel as summer concludes. For a detailed look at July’s weather, you can refer to Port Saint Mary weather in July.
In comparing the weather between August and September, it is evident that September brings slightly cooler temperatures, with a minimum of 10°C (51°F) compared to August's minimum of 12°C (54°F). The average temperature also decreases from 15°C (59°F) in August to 14°C (58°F) in September, while the maximum temperature remains similar at 19°C (67°F) in September and 18°C (65°F) in August. Both months experience significant rainfall, with September encountering 91 mm (3.6 in) over 14 days, slightly less than August's 94 mm (3.7 in) over 15 days. Additionally, September's humidity is higher at 85%, compared to August's 79%. For a detailed view of August's weather, you can check Port Saint Mary weather in August.
In September, temperatures ranged from a minimum of 10°C (51°F) to a maximum of 19°C (67°F), with an average temperature of 14°C (58°F). The month saw a total precipitation of 91 mm (3.6 in) over 14 days, accompanied by a humidity level of 85%. In contrast, October brings slightly cooler weather, with temperatures ranging from a minimum of 7°C (45°F) and a maximum of 17°C (63°F), averaging 13°C (55°F). Additionally, October experiences increased precipitation, totaling 142 mm (5.6 in) over 18 days, and a higher humidity of 90%. For a detailed look at the October conditions, you can visit Port Saint Mary weather in October.
In September, temperatures in Port Saint Mary range from a minimum of 10°C (51°F) to a maximum of 19°C (67°F), with an average of 14°C (58°F). The month sees approximately 91 mm (3.6 in) of precipitation over 14 days and a humidity level of 85%. In contrast, November experiences cooler temperatures, with highs peaking at 14°C (58°F) and an average of just 10°C (51°F). Precipitation increases significantly to 143 mm (5.6 in) across 20 days, and humidity rises to 91%. For more details, check Port Saint Mary weather in November.
September weather tends to be milder, with average temperatures ranging from a minimum of 10°C (51°F) to a maximum of 19°C (67°F). The month experiences a total precipitation of 91 mm (3.6 in) over approximately 14 days, and the humidity level is relatively high at 85%. In contrast, December sees cooler temperatures, with an average ranging from 4°C (39°F) to 13°C (56°F). The precipitation increases to 144 mm (5.7 in), falling over about 22 days, and humidity rises slightly to 89%. For more detailed insights, you can check the Port Saint Mary weather in December.
As September arrives in Port Saint Mary, the transition to autumn is evident, bringing a noticeable chill to the air. The cool average temperature settles around 14°C (58°F), creating a refreshing backdrop for outdoor activities, while the increased humidity at 85% can make the days feel a bit heavier. Compared to the sunnier and warmer summer months, September does experience a rise in precipitation, with 14 days of light rain contributing to a total of 91 mm (3.6 in). This month serves as a gentle reminder that summer has come to an end, making it a perfect time to embrace the changing landscape and enjoy the unique charm of the season. For more insights into the weather patterns, visit Port Saint Mary Climate.