Last updated: March 17, 2025
In September, Chichester, United Kingdom, experiences a delightful transition into autumn, with temperatures ranging from a maximum of 23°C (74°F) to a minimum of 9°C (49°F). The average temperature hovers around 16°C (62°F), providing a comfortable climate for outdoor activities. However, residents and visitors can expect 61 mm (2.4 in) of rain over approximately 10 days, resulting in an 82% humidity level that adds a touch of crispness to the air. September offers a unique blend of warm days and cooler evenings, making it an ideal time to explore Chichester's rich history and vibrant landscapes.
As September unfolds in Chichester, the city experiences a pleasant transition from the warmth of summer to the cooler embrace of autumn. With minimum temperatures averaging around 9°C (49°F) and maximums reaching up to 23°C (74°F), the month offers a comfortable average of 16°C (62°F). This represents a slight dip from August's highs, yet still invites outdoor exploration, as the days remain relatively warm and the evenings gradually cool off. Collectively, September's moderate climate is ideal for enjoying the scenic beauty and cultural richness that Chichester has to offer, marking a delightful balance between summer's lingering warmth and autumn's refreshing approach.
In September, Chichester experiences a moderate precipitation total of 61 mm (2.4 in) across approximately 10 days, marking a slight dip from the wetter months of August. This month often serves as a transition, as summer showers give way to the more frequent downpours characteristic of autumn. The precipitation levels in September are considerably lower than the peak observed in October, which averages at 126 mm (5.0 in), suggesting a shift in weather patterns as the region braces for the impending seasonal changes. Despite the decrease, September's rainfall continues to provide essential moisture for the lush landscapes of the area, maintaining the vibrant scenery that Chichester is known for.
In September, Chichester experiences a noticeable rise in humidity, with levels reaching 82%. This marks a transition as the summer months end, where July and August witness lower humidity levels at 71% and 76%, respectively. As the cool autumn air begins to settle in, September's humidity serves as a bridge between summer's relative dryness and the onset of wetter, chillier months ahead, such as October and November, which see humidity levels jump back to 90% and 92%. This trend reflects the region's seasonal shift, with a gradual return to the higher humidity that characterizes much of the rest of the year.
As we step into September in Chichester, the UV Index remains at a high level of 6, similar to the peak summer months, showcasing the lingering intensity of sunlight. With a burn time of just 25 minutes, it's essential to stay vigilant about sun protection even as the season begins to shift. This month marks a slight decrease from the extreme 8 seen in July and June, but it still indicates a notable risk for skin damage with insufficient protection. As the days shorten and temperatures drop, the UV Index gradually trends downward, moving towards more moderate readings in October. For a detailed understanding of the UV levels throughout the year, you can check the Chichester UV Index.
UV Risk Categories
As summer gracefully transitions into autumn, September in Chichester shines with an impressive 322 hours of sunshine, showcasing a pleasant blend of warmth and crispness. This month retains a significant share of the sun's embrace, although it marks a gradual decline from the sun-drenched heights of summer, particularly July's peak of 424 hours. Following the vibrant days of August, which recorded 387 hours, September serves as a gentle reminder that while the sun begins to set earlier, there is still plenty of time to enjoy the great outdoors. As the year progresses into the cooler months, the sunshine hours drop notably, as evidenced by October's 254 hours, highlighting a clear seasonal trend that invites both reflection and anticipation of the changing landscapes ahead.
As summer transitions to autumn, Chichester experiences a slight dip in the likelihood of sunny weather in September, with a chance of sunshine around 37%. This marks a subtle decline from the peak sunny days enjoyed in April at 58%, reflecting the cooling atmosphere that begins to envelop the region. Compared to the preceding months, particularly the vibrant summer, where July boasts a 43% chance of clear skies, September serves as a bridge to the milder conditions of October, which sees a further decline to 31%. Overall, while September offers a decent opportunity for enjoyable sunny spells, it signals the onset of shorter days and less predictable weather, inviting locals and visitors alike to savor what sunshine remains before autumn fully sets in.
As summer fades in Chichester, September ushers in a gentle transition with approximately 12 hours of daylight. This month marks a noticeable dip from the long, sun-drenched days of summer, where June peaked at an impressive 16 hours. Following a warm August with 14 hours of illumination, September serves as a reminder of the approaching autumn, as daylight gradually decreases toward the 10 hours typical of October. The rhythm of daylight throughout the year illustrates the changing seasons, with each month offering its unique blend of light and shadow that shapes the character of Chichester's landscape. As the days shorten, the promise of cozy evenings and the rich hues of fall become increasingly inviting.
September in Chichester ushers in a noticeable shift in wind dynamics, with an average wind speed of 5.2 m/s (12 mph), reflecting a gentle transition as summer gives way to autumn. This slight dip follows the more robust breezes of the preceding months, particularly August's 5.8 m/s (13 mph) and July's 5.0 m/s (11 mph). Overall, the late summer and early autumn months reveal a consistent trend of diminishing wind speeds, with June hitting the low at 4.3 m/s (10 mph), while October shows a resurgence as winds pick up again, reaching 6.8 m/s (15 mph). This rhythm of winds paints a vivid picture of the seasonal changes in Chichester, inviting locals and visitors alike to relish in the tranquil yet dynamic atmosphere of early fall.
The weather in Chichester 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 Chichester and find detailed weather information for every month.
September and January exhibit contrasting weather patterns, highlighting the transition from late summer to winter. In September, temperatures range from a mild minimum of 9°C (49°F) to a pleasant maximum of 23°C (74°F), with an average of 16°C (62°F). The month sees a total precipitation of 61 mm (2.4 in) over about 10 days and a relative humidity 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), leading to a lower average of 7°C (44°F). Additionally, January records slightly higher precipitation at 75 mm (2.9 in) across 12 days, accompanied by a humidity level of 91%. For a more detailed look at the January conditions, check out Chichester weather in January.
September and February present a striking contrast in weather patterns. In September, temperatures are more moderate, 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). This month experiences about 61 mm (2.4 in) of precipitation over approximately 10 days, with humidity levels at 82%. In stark contrast, February has a chillier climate, with temperatures dipping as low as -2°C (29°F) and reaching a maximum of only 12°C (54°F), averaging around 7°C (45°F). Rainfall is slightly higher at 82 mm (3.2 in) across 13 days, and the humidity is elevated at 89%. For more detailed information, you can visit Chichester weather in February.
When comparing the weather in September and March, notable differences emerge. September typically enjoys milder temperatures, with a minimum of 9°C (49°F) and a comfortable average of 16°C (62°F), peaking at 23°C (74°F). In contrast, March is much cooler, starting with lows of -2°C (29°F) and an average of only 8°C (46°F), with a maximum temperature of 13°C (56°F). Additionally, while both months see some precipitation, March is slightly wetter, receiving 73 mm (2.9 in) over 14 days, compared to September's 61 mm (2.4 in) across 10 days. Humidity levels are similar, with September at 82% and March at 86%, contributing to a generally damp atmosphere during both months. For more detailed insights on March weather, visit Chichester weather in March.
September and April showcase contrasting weather patterns, with September typically offering milder temperatures and a more pleasant atmosphere. In September, the minimum temperature is around 9°C (49°F) with an average of 16°C (62°F) and a maximum reaching 23°C (74°F). Additionally, this month experiences approximately 61 mm (2.4 in) of precipitation over 10 days, alongside a humidity level of 82%. In contrast, April temperatures tend to be cooler, starting from a minimum of 2°C (35°F), averaging 9°C (49°F), and peaking at 17°C (62°F). Precipitation during April is significantly lower, at 31 mm (1.2 in) over just 6 days, although humidity remains slightly higher at 85%. For more detailed information, you can visit Chichester weather in April.
In comparing the weather between September and May, we see notable differences in temperature and humidity. September tends to be warmer, with an average temperature of 16°C (62°F) and daytime highs reaching up to 23°C (74°F), while May has a cooler average of 12°C (54°F) and maximum temperatures peaking at 20°C (68°F). Despite both months experiencing similar levels of precipitation (61 mm in September and 51 mm in May), September’s higher humidity at 82% contributes to a more muggy feel compared to May’s 79%. For more detailed information, you can check Chichester weather in May.
In comparing the weather between September and June, we can see some interesting differences and similarities. September tends to be slightly warmer, with average temperatures reaching 16°C (62°F) compared to June's average of 15°C (60°F). The maximum temperature in September is also a bit higher at 23°C (74°F), as opposed to June's maximum of 22°C (72°F). However, June experiences slightly less precipitation at 70 mm (2.8 in) over 9 days, while September sees 61 mm (2.4 in) across 10 days. Both months share a relatively high humidity level, with September at 82% and June at 80%. For more detailed information about June weather, you can visit Chichester weather in June.
In comparing the weather of September and July, it's notable that both months share a maximum temperature of 23°C (74°F), but their overall climates feel quite different. September typically sees cooler evenings, with a minimum temperature of 9°C (49°F), compared to July's warmer minimum of 13°C (55°F). Additionally, September experiences a higher average temperature of 16°C (62°F) versus July's 18°C (64°F), alongside increased humidity levels in September at 82% compared to 71% in July. Precipitation is relatively similar, with September receiving 61 mm (2.4 in) over about 10 days and July slightly less at 59 mm (2.3 in) over 11 days. For more detailed insights into July's weather, you can check Chichester weather in July.
In August, the weather is generally warmer with temperatures ranging from a minimum of 12°C (53°F) to a maximum of 25°C (77°F), averaging around 18°C (64°F). There's also slightly more precipitation, totaling 83 mm (3.3 in) over about 12 days, coupled with a humidity level of 76%. In contrast, September brings cooler temperatures, with a minimum of 9°C (49°F) and a maximum of 23°C (74°F), averaging 16°C (62°F). Although September has less rain at 61 mm (2.4 in) over 10 days, it experiences a higher humidity level of 82%. For more details about August weather, check Chichester weather in August.
The weather in September is generally milder than in October, with average temperatures ranging from a minimum of 9°C (49°F) to a maximum of 23°C (74°F), compared to October’s range of 5°C (42°F) to 20°C (68°F). September experiences less precipitation, with 61 mm (2.4 in) over about 10 days, while October sees a significant increase in rainfall, reaching 126 mm (5.0 in) over 16 days. Additionally, October has a higher humidity level at 90%, compared to September's 82%. For a more detailed look at the October weather in Chichester, you can visit Chichester weather in October.
September tends to be warmer than November, with average temperatures hovering around 16°C (62°F) compared to November’s cooler average of 10°C (51°F). The maximum temperature in September reaches up to 23°C (74°F), while November peaks at 16°C (61°F). Additionally, September experiences less rainfall, with 61 mm (2.4 in) over about 10 days, while November sees significantly higher precipitation at 98 mm (3.9 in) across 16 days. The humidity also rises in November, reaching 92% compared to September's 82%. For more details, you can visit Chichester weather in November.
September and December weather showcases a stark contrast, with September offering milder temperatures that range from a minimum of 9°C (49°F) to a maximum of 23°C (74°F) and an average of 16°C (62°F). The month sees a total precipitation of 61 mm (2.4 in) spread over 10 days, combined with a relatively comfortable humidity level of 82%. In contrast, December brings notably cooler conditions, with temperatures dipping to a minimum of 1°C (34°F) and peaking at just 13°C (56°F), resulting in an average temperature of 8°C (47°F). The precipitation also increases significantly to 131 mm (5.2 in) over 17 days, accompanied by higher humidity at 92%. For more detailed information, you can check out Chichester weather in December.
As September unfolds in Chichester, it marks a subtle transition from the warmth of summer to the cooler embrace of autumn. With a blend of pleasant maximum temperatures and refreshing evenings, this month often feels like a delightful balance, offering a unique charm that sets it apart from the sweltering highs of July and August. While you may encounter some rain—spreading across a handful of days—September’s humidity adds a touch of softness to the air. For those seeking to explore the serene beauty of the area during this transitional period, consider the insights provided on Chichester Climate.