Last updated: March 17, 2025
In St Ives, United Kingdom, September casts a delightful mix of early autumn charm with its average temperature resting around 15°C (60°F). Visitors can expect highs of up to 25°C (77°F), perfect for enjoying the picturesque coastline, while evenings may cool down to a refreshing 9°C (49°F). Although the month sees about 73 mm (2.9 in) of rainfall over 13 days, the 85% humidity adds to the coastal ambiance, making it a beautiful time to explore this idyllic seaside town. Whether it's basking in the sun or strolling through quaint streets, September in St Ives promises memorable experiences amid shifting seasonal colors.
As summer begins to fade, September in St Ives brings a delightful transition in temperatures. With minimums averaging around 9°C (49°F) and peaking at a warm 25°C (77°F), the early days of autumn still bask in the warmth of the departing summer. The average temperature settles at a pleasant 15°C (60°F), making it a wonderful time for outdoor activities and enjoying the coastal charm. This month showcases a gradual decline in warmth from the scorching peaks of July and August, yet still retains a sense of comfort before the cooler months creep in. Visitors can relish in the mild weather, as it offers an inviting atmosphere for exploring the beauty of St Ives, making September a lovely balance between summer's end and autumn's embrace.
September marks a transitional phase in St Ives, United Kingdom, as summer gives way to autumn. With an average precipitation of 73 mm (2.9 in) over approximately 13 days, this month sees a slight uptick compared to the drier months of summer, like July and August, both of which experienced less rainfall. This trend reflects the region's shift toward wetter conditions, setting the stage for the heavier rainfalls that characterize the following months, particularly October which averages a notable 129 mm (5.1 in). As the days grow shorter and cooler, September serves as a reminder of the changing seasons, offering a balance between lingering warmth and the promise of the drizzly autumn ahead.
In September, St Ives experiences a humidity level of 85%, maintaining the trend of elevated moisture typical for late summer. Following a peak in July at 87%, the humidity slightly dips but remains consistent with both August and October, which also sit at 86% and 85%, respectively. This stability suggests a gradual transition into the autumn months, as humidity levels shift downward from the summer highs. Overall, while September's humidity is slightly lower than the summer peak, it continues to exhibit the characteristic dampness of coastal living in this charming coastal town.
As summer wanes in St Ives, the September UV Index reflects a shift towards autumn, measuring 6 and falling into the high exposure category. This marks a slight decline from the peak of 9 in June, but it still requires careful sun protection, with a burn time of just 25 minutes for fair-skinned individuals. The trend across the months highlights a gradual reduction in UV intensity as the year progresses; however, September's levels remind us that sun safety remains essential, bridging the gap to the cooler months ahead. For a detailed overview, check out the St Ives UV Index.
UV Risk Categories
As summer gradually fades, September in St Ives, United Kingdom, continues to bask in a welcoming 328 hours of sunshine, marking a delightful transition into autumn. This month reflects a significant drop from the sun-soaked July peak of 427 hours, yet it remains a vibrant time for visitors to enjoy lingering warmth and fewer crowds. The gradual decline in daylight hours is part of a broader trend seen throughout the year, with sunshine starting to wane after the lush, bright days of summer. September's sunshine, while less abundant than its summer predecessors, still provides an excellent opportunity to savor the scenic coast and vibrant culture of St Ives before the chill of October settles in with just 261 hours on the horizon.
As September rolls into St Ives, the coastal charm begins to bask in a moderate likelihood of sunny weather, with a 32% chance of sun illuminating the picturesque landscape. This month marks a transition, falling just shy of the summer peak seen in July and August, which enjoy higher probabilities of sunshine at 39% and 32% respectively. Although there's a slight dip in sunny prospects compared to the vibrant spring months, when April boasts a 50% chance, September still offers delightful opportunities for enjoying the outdoors. With summer’s warmth lingering, it’s a beautiful time for last-minute beach outings and coastal walks, making the most of the waning sunshine before autumn takes hold.
As summer fades into autumn, September in St Ives, United Kingdom, welcomes a notable transition in daylight, offering approximately 12 hours of sunlight. This marks a gradual decline from the sunniest months of June and July, where residents enjoyed up to 16 hours of daylight. The shift into fall is mirrored in October's shorter days, dropping further to 10 hours. Interestingly, September strikes a balance between the extended brightness of summer and the encroaching chill of winter, reminding us of nature's cyclical rhythm. The month’s daylight also provides an inviting atmosphere for outdoor activities, making it a delightful time to savor St Ives' stunning coastal scenery before the days grow shorter.
As September rolls into St Ives, the coastal town experiences a gentle shift in its wind patterns, with an average speed of 4.7 m/s (10 mph). This marks a noticeable dip compared to the more blustery summer months, where July and August boasted average winds of 4.8 m/s (11 mph) and 5.2 m/s (12 mph), respectively. The transition into autumn brings a calmer atmosphere, as the winds soften from the peak speeds seen earlier in the year, such as January's 6.8 m/s (15 mph). This trend of diminishing wind sets the stage for a serene September, inviting locals and visitors alike to savor the picturesque surroundings and the tranquil beauty of St Ives as it prepares for the cooler months ahead.
The weather in St Ives changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in St Ives and find detailed weather information for every month.
September and January showcase distinctly different weather patterns. In September, temperatures can range from a cool 9°C (49°F) to a warm 25°C (77°F), with an average of 15°C (60°F). This month also sees relatively high humidity at 85% and consistent precipitation, totaling 73 mm (2.9 in) over 13 days. In contrast, January experiences lower temperatures, with a minimum of 2°C (35°F) and a maximum of 14°C (58°F), averaging at just 8°C (47°F). The precipitation slightly increases to 78 mm (3.1 in) across the same number of days, while humidity decreases to 81%. For a deeper understanding of the winter weather patterns, you can explore St Ives weather in January.
In comparing the weather between September and February, we see notable differences in temperature and precipitation. September tends to be milder, with average temperatures ranging from a minimum of 9°C (49°F) to a maximum of 25°C (77°F), while February is much cooler, with temperatures ranging from -1°C (30°F) to a max of 14°C (57°F). Precipitation is slightly higher in February, with 92 mm (3.6 in) over 17 days compared to September's 73 mm (2.9 in) over 13 days, contributing to a damp feeling in both months, though the humidity levels remain quite similar at around 84-85%. For more detailed insights, you can check St Ives weather in February.
When comparing the weather in September to that of March, it’s clear that September tends to be warmer and drier. In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 25°C (77°F), with an average of 15°C (60°F) and 73 mm (2.9 in) of precipitation over about 13 days. In contrast, March experiences much cooler temperatures, dipping as low as -3°C (27°F) and peaking at 15°C (60°F), with an average of 9°C (48°F). Precipitation in March is slightly higher, at 87 mm (3.4 in), and occurs over 17 days. Both months exhibit high humidity, around 85% in September and 83% in March, contributing to the distinct feel of early autumn compared to late winter. For more details on March weather specifically, you can check out St Ives weather in March.
When comparing the weather in September and April, notable differences emerge. September typically experiences a wider temperature range, with minimum temperatures around 9°C (49°F) and maximums reaching 25°C (77°F), resulting in an average of 15°C (60°F). In contrast, April is cooler, with minimums of 3°C (38°F) and maximums of 18°C (65°F), leading to a lower average of 10°C (50°F). Precipitation in September is greater, totaling 73 mm (2.9 in) over approximately 13 rainy days, while April sees less rain at 48 mm (1.9 in) over about 9 days. Both months feature high humidity, with September slightly higher at 85% compared to April's 84%. For a detailed look at the weather patterns, you can visit St Ives weather in April.
September and May present distinct weather patterns, showcasing a transition from summer to autumn. In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 25°C (77°F), with an average of 15°C (60°F). This month also experiences slightly more precipitation at 73 mm (2.9 in) over 13 days. In contrast, May tends to be cooler, with temperatures varying from a minimum of 5°C (42°F) to a maximum of 21°C (70°F), and an average of 12°C (54°F). Additionally, May sees less precipitation, totaling 64 mm (2.5 in) over 12 days. Both months have high humidity at 85%, but September's warmer temperatures make it feel more summer-like, while May heralds the approach of warmer days. For a detailed look at May weather, you can refer to St Ives weather in May.
In comparing the weather of September and June, both months exhibit similar temperature ranges, with minimums around 9°C (49°F), average temperatures close to 15°C (59-60°F), and maximums reaching 25°C (76-77°F). However, June tends to be slightly wetter, with a total precipitation of 82 mm (3.2 in) over 14 days compared to September's 73 mm (2.9 in) across 13 days. Humidity levels are also comparable, with September at 85% and June at 86%. For those interested in detailed June weather conditions, you can check St Ives weather in June.
In comparing the weather of September and July, it's evident that both months experience similar maximum temperatures, peaking at around 25°C (77°F). However, September tends to be cooler overall, with average temperatures dropping to 15°C (60°F), compared to July's warmer average of 17°C (62°F). Precipitation is slightly higher in September, totaling 73 mm (2.9 in) over 13 days, while July sees 65 mm (2.6 in) over 11 days. Additionally, humidity levels are slightly lower in July at 87%, in contrast to September's 85%. For more detailed information about July weather, you can visit St Ives weather in July.
September weather shows a slight drop in temperatures compared to August, with minimums averaging 9°C (49°F) versus 13°C (55°F) in August. The average September temperature is 15°C (60°F), just a bit lower than August's average of 16°C (62°F), while the maximum temperature in September reaches 25°C (77°F), slightly higher than the max of 23°C (73°F) in August. In terms of precipitation, September experiences a bit more with 73 mm (2.9 in) over 13 days compared to August's 63 mm (2.5 in) over the same number of days. Humidity remains fairly consistent, standing at 85% in September and 86% in August. For more specific details, you can check St Ives weather in August.
September and October present a notable shift in weather patterns. September experiences milder temperatures, with a minimum of 9°C (49°F) and an average of 15°C (60°F), peaking at 25°C (77°F). Meanwhile, October sees cooler temperatures, dropping to a minimum of 4°C (39°F) and averaging 13°C (56°F), with a maximum of 19°C (67°F). Precipitation also increases in October, with 129 mm (5.1 in) over 16 days compared to September's 73 mm (2.9 in) over 13 days. Despite the change in temperatures and rainfall, humidity remains consistent at 85% for both months. For more details on October weather, you can check St Ives weather in October.
September tends to be warmer than November, with minimum temperatures around 9°C (49°F) and an average of 15°C (60°F), while November sees cooler averages with a minimum of 3°C (38°F) and an average of just 11°C (51°F). Additionally, September experiences less rainfall, with 73 mm (2.9 in) over 13 days, compared to November's 113 mm (4.4 in) spread across 20 days. Humidity remains relatively high in both months, at 85% in September and slightly lower at 82% in November. For more detailed weather information, check St Ives weather in November.
September and December exhibit notably different weather patterns. In September, temperatures range from a mild minimum of 9°C (49°F) to a pleasant maximum of 25°C (77°F), with an average of 15°C (60°F). The month experiences a total precipitation of 73 mm (2.9 in) over approximately 13 days, accompanied by high humidity at 85%. In contrast, December is cooler, with temperatures dipping to a minimum of 4°C (39°F) and peaking at a maximum of 14°C (57°F), averaging 10°C (50°F). Rainfall increases significantly to 138 mm (5.4 in) spread over 22 days, while humidity slightly decreases to 80%. For more details on December weather, check St Ives weather in December.
As summer gently fades, September in St Ives offers a refreshing transition, characterized by mild temperatures and a noticeable increase in humidity. Unlike the sweltering heat of July and August, September presents a more temperate climate, with days that are warm but not overwhelmingly hot. While occasional rain can interrupt the otherwise pleasant weather, the month tends to experience a unique blend of sunshine and gentle showers, which adds to the charm of coastal walks. With an average temperature that still invites outdoor activities, September stands apart, making it a delightful time to explore the scenic beauty of the region. For more insights on what to expect, check out St Ives Climate.