Last updated: March 17, 2025
In September, Selsey, United Kingdom, experiences a blend of mild temperatures and refreshing coastal breezes. With a maximum of 23°C (74°F) and an average of 16°C (62°F), the weather is generally comfortable for outdoor activities. However, evenings can be cooler, dipping to a minimum of 9°C (49°F). The month sees about 61 mm (2.4 in) of rain spread across 10 days, contributing to a relative humidity level of 82%. This combination of climate factors creates an inviting atmosphere ideal for exploring Selsey’s stunning landscapes and vibrant local culture.
In September, Selsey, United Kingdom, experiences a delightful shift as summer fades into autumn. With a minimum temperature of 9°C (49°F) and a comfortable average of 16°C (62°F), the weather remains pleasantly mild. The maximum temperature peaks at 23°C (74°F), allowing for a few lingering warm days, perfect for enjoying outdoor activities. Compared to the warmer summer months, September offers a refreshing transition, with cooler evenings and a hint of crispness in the air. This change not only enhances the beauty of the surrounding landscape but also invites locals and visitors alike to relish in the seasonal charm.
September in Selsey, United Kingdom, brings a noticeable shift in precipitation patterns as summer transitions into autumn. With 61 mm (2.4 in) of rainfall spread over 10 days, the month remains relatively moderate compared to the preceding August, which recorded a heavier 83 mm (3.3 in). This slight decrease in both total rainfall and rainy days hints at the changing seasons, paving the way for the significantly wetter months ahead. As October looms, anticipated precipitation spikes to 126 mm (5.0 in), indicating a clear trend towards the peak of Selsey's rainy season, while September balances bustling summer showers with a hint of the autumnal surge that follows.
In September, Selsey experiences a noticeable uptick in humidity, averaging around 82%. This increase marks a shift from the relatively drier summer months, particularly July and August, which see humidity levels dip to 71% and 76%, respectively. As autumn approaches, this rise in moisture sets the stage for the damp conditions that will characterize the coming months, with October and November returning to higher averages of 90% and 92%. Overall, September serves as a transitional point, balancing the lingering warmth of summer with the impending chill of fall, reflected in its moderate humidity level.
As summer transitions to autumn in Selsey, the UV Index begins to gradually decline in September, recording a value of 6 which indicates a high level of sun exposure. This reflects a shift from the very high indexes of July and August, where caution was paramount with burn times as short as 15 minutes. In September, while the sun's intensity is less fierce, residents must still be mindful, as a burn can occur in about 25 minutes of unprotected exposure. The trend shows a marked decrease in UV intensity from the peak summer months, yet it remains essential to protect your skin. For further insights on the UV conditions in Selsey, visit Selsey UV Index.
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As summer transitions to autumn, September in Selsey showcases a notable blend of light and warmth, offering an impressive 322 hours of sunshine. This month continues a trend of increasing daylight, peaking in the vibrant days of June and July, where residents enjoyed over 400 hours of sun. Compared to the earlier months, September retains a substantial amount of sunshine, signaling a gentle farewell to the brighter days of summer. The move into October sees a decrease, with sunlit hours dropping to 254, but September serves as a beautiful bridge, allowing locals to soak in the last golden rays before autumn's chill sets in.
In Selsey, United Kingdom, the likelihood of sunny weather in September stands at a moderate 37%, showcasing a slight uptick from the summer months. As the year progresses from the bright beginnings of spring and the peak sun potential in April (58%), the chances gradually dip through the summer. June and July bring 30% and 43% chances of sunshine respectively, before August's decline to 35%. September, with its gentle warmth, becomes a transitional period, hinting at the approach of autumn while still offering opportunities for sun-soaked days. Though not the sunniest month, it comfortably outpaces both the earlier winter months and the slightly lower odds in October (31%), marking it as a time when the last vestiges of summer can still be enjoyed.
As summer begins to wane, September in Selsey, United Kingdom, offers a gentle transition into autumn with about 12 hours of daylight. This marks a noticeable decline from the vibrant 16 hours enjoyed in June, gradually cascading down as the days grow shorter. Following the sun-soaked months of July and August, which boast 15 and 14 hours of daylight respectively, September stands out as a bridge, presenting a serene mix of lingering warmth and the subtle onset of the season's chill. As the month progresses, daylight continues its retreat toward the 10-hour mark seen in October, reflecting nature's rhythm of change as daylight wanes in preparation for winter's embrace.
As summer fades, September brings a gentle breeze to Selsey, with average wind speeds dropping to 5.2 m/s (12 mph). This marks a subtle continuation of the cooling trend observed since the peak of summer, where wind speeds typically ranged higher at 5.8 m/s (13 mph) in August. The transition into autumn is characterized by a gradual decline, following a noticeable peak in February's 7.5 m/s (17 mph) windiness, setting the stage for the more dynamic winds of October which rise again to 6.8 m/s (15 mph). The pattern reflects a natural ebb and flow, with September's calmer winds evoking a sense of serenity as the season shifts, inviting visitors to enjoy the smooth whispers of the coastal air.
The weather in Selsey 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 Selsey and find detailed weather information for every month.
September and January present quite contrasting weather patterns. In September, temperatures range from a minimum of 9°C (49°F) to a maximum of 23°C (74°F), with an average of 16°C (62°F). The month sees about 61 mm (2.4 in) of precipitation over approximately 10 days and maintains a humidity level of 82%. In stark contrast, January experiences much cooler temperatures, with a minimum of 1°C (33°F) and a maximum of 13°C (55°F), averaging around 7°C (44°F). Precipitation is slightly higher at 75 mm (2.9 in), occurring on about 12 days, with an increased humidity level of 91%. For more detailed information, you can visit Selsey weather in January.
September and February present contrasting weather patterns that highlight the seasonal transitions. September enjoys milder temperatures, ranging from a minimum of 9°C (49°F) to a maximum of 23°C (74°F), with an average of 16°C (62°F). The month typically sees around 61 mm (2.4 in) of precipitation over approximately 10 days, accompanied by a relatively lower humidity level of 82%. In stark contrast, February experiences colder conditions, with temperatures fluctuating between -2°C (29°F) and a maximum of 12°C (54°F), averaging at 7°C (45°F). This winter month also has a higher precipitation total of 82 mm (3.2 in) spread over about 13 days, along with increased humidity at 89%. For more specific details about February weather, you can refer to Selsey weather in February.
In September, the weather is generally milder, with average temperatures ranging from a minimum of 9°C (49°F) to a maximum of 23°C (74°F), and lower humidity at 82%. This month experiences around 61 mm (2.4 in) of precipitation over approximately 10 days. In contrast, March is considerably cooler, featuring temperatures that range from a chilly minimum of -2°C (29°F) to a maximum of only 13°C (56°F). It also sees slightly higher rainfall, totaling 73 mm (2.9 in) across about 14 days, and a higher humidity level at 86%. For a detailed look at the conditions in March, you can check out Selsey weather in March.
The weather in September is generally warmer than in April, with average temperatures ranging from a minimum of 9°C (49°F) to a maximum of 23°C (74°F), compared to April's cooler temperatures which range from 2°C (35°F) to 17°C (62°F). Additionally, September experiences more precipitation, totaling 61 mm (2.4 in) over 10 days, whereas April sees only 31 mm (1.2 in) spread across 6 days. Despite their differences, both months have relatively high humidity levels, with September at 82% and April slightly higher at 85%. For more details on April's weather specifics, you can visit Selsey weather in April.
In comparing the weather between September and May, September generally offers warmer temperatures, with minimums of 9°C (49°F) and maximums reaching up to 23°C (74°F), compared to May's milder minimum of 5°C (42°F) and maximum of 20°C (68°F). The average temperature in September is also higher at 16°C (62°F) versus May's 12°C (54°F). Both months experience a similar amount of rainfall, with September having 61 mm (2.4 in) and May slightly lower at 51 mm (2.0 in), though both months see precipitation on about 10 days. Humidity levels are slightly higher in September at 82% compared to 79% in May. For more details, you can check out Selsey weather in May.
In comparing the weather of September and June, both months display mild temperatures but September tends to be slightly warmer. September features a temperature range from a minimum of 9°C to a maximum of 23°C, averaging around 16°C, while June has a range from 10°C to 22°C with an average of 15°C. Although September has a lower precipitation total of 61 mm over 10 days, compared to June’s 70 mm over 9 days, the humidity is slightly higher in September at 82% versus June's 80%. For more detailed insights into June weather, you can check Selsey weather in June.
When comparing the weather in September to that of July, we see distinct differences in temperature and humidity. September tends to start cooler with minimum temperatures dropping to around 9°C (49°F), while July maintains a warmer minimum of 13°C (55°F). Both months have similar maximum temperatures peaking at 23°C (74°F), but September enjoys a slightly lower average temperature of 16°C (62°F) compared to July's 18°C (64°F). Additionally, September experiences higher humidity at 82%, making it feel more muggy, whereas July's humidity is more comfortable at 71%. Both months see approximately similar levels of precipitation, with September recording 61 mm (2.4 in) over 10 days and July at 59 mm (2.3 in) over 11 days. For more detailed insights, you can check Selsey weather in July.
September generally brings cooler temperatures compared to August, with a minimum of 9°C (49°F) and a maximum of 23°C (74°F) in September, compared to August's 12°C (53°F) minimum and 25°C (77°F) maximum. The average temperature in September is 16°C (62°F), slightly lower than August's 18°C (64°F). Although September experiences less total precipitation at 61 mm (2.4 in) over 10 days, compared to August's 83 mm (3.3 in) over 12 days, it maintains a higher humidity level of 82% versus August's 76%. For more insights into August's weather, visit Selsey weather in August.
September typically offers milder temperatures, with minimums around 9°C (49°F) and maximums peaking at 23°C (74°F). In contrast, October sees a drop in temperatures, with averages settling at a minimum of 5°C (42°F) and maximums of 20°C (68°F). Additionally, October is notably wetter, receiving 126 mm (5.0 in) of precipitation over 16 days, compared to September's 61 mm (2.4 in) over 10 days. The humidity also rises in October, reaching 90% compared to September's 82%. For more detailed information, check out Selsey weather in October.
September generally offers milder weather compared to November, with temperatures ranging from a minimum of 9°C (49°F) to a pleasant maximum of 23°C (74°F) and an average of 16°C (62°F). In contrast, November experiences cooler temperatures, dropping to a minimum of 2°C (35°F) and reaching a maximum of only 16°C (61°F), with an average of 10°C (51°F). Additionally, September sees less precipitation at 61 mm (2.4 in) over about 10 days, while November is wetter with 98 mm (3.9 in) spread over 16 days, contributing to a higher humidity level of 92%. For more detailed information, check out Selsey weather in November.
September and December present quite different weather conditions. In September, temperatures are milder, ranging from a minimum of 9°C (49°F) to a comfortable maximum of 23°C (74°F), with an average of 16°C (62°F). The month typically experiences about 61 mm (2.4 in) of precipitation across 10 days and has a humidity level of 82%. In contrast, December sees a significant drop in temperatures, with highs averaging just 13°C (56°F) and lows plummeting to 1°C (34°F). This month is wetter, recording approximately 131 mm (5.2 in) of rain over 17 days, coupled with higher humidity at 92%. For more details on December weather, you can check Selsey weather in December.
As summer transitions into autumn, September in Selsey brings a delightful shift in weather, characterized by moderate temperatures that average a pleasant 16°C. Unlike the peak heat of summer, you'll find maximum temperatures around 23°C, making it an ideal time to enjoy outdoor activities without the sweltering heat. However, the month does see a bit more rainfall, with about 61 mm falling over 10 days, so it's wise to keep an umbrella handy. The humidity remains relatively high at 82%, providing a unique coastal atmosphere. Overall, September strikes a beautiful balance between warmth and the refreshing coolness of autumn, making it a unique month in Selsey. For more details on weather patterns throughout the year, visit Selsey Climate.