Last updated: March 17, 2025
September in the City of Westminster, United Kingdom showcases a dynamic climate, characterized by a maximum temperature reaching 28°C (83°F), while the average hovers around a comfortable 15°C (59°F). The month experiences a cooler minimum of 4°C (39°F), providing a refreshing contrast. Rainfall is moderate, with a total of 45 mm (1.8 inches) spread over approximately 10 days, resulting in a monthly humidity level of 82%. This blend of warm days and occasional showers makes September a unique time to explore Westminster's rich history and vibrant culture.
As September arrives in the City of Westminster, the temperatures begin to shift, offering a refreshing transition from the sweltering summer. The minimum temperatures average around 4°C (39°F), while the pleasant average sits at 15°C (59°F), allowing for comfortable outdoor explorations. With daytime highs reaching 28°C (83°F), September still showcases the warmth of late summer, yet starts to hint at the cooler days ahead. This month marks a decline in extremes, with the weather gradually cooling as it prepares for autumn’s embrace, providing an ideal backdrop for enjoying the city's historic sights and vibrant parks in their early fall glory.
September in the City of Westminster sees a modest precipitation amount of 45 mm (1.8 in), marking a dip from the summer's wetter months. Typically, this month experiences around 10 rainy days, which aligns closely with the overall trend of consistent rainfall observed from May through August. While September signals the onset of autumn, bringing cooler air, it also hints at an impending increase in precipitation as October approaches, where the average jumps to 84 mm (3.3 in). This pattern illustrates the transition from late-summer warmth to the distinctive, drizzly character of the UK's autumn, with September serving as a brief interlude before transitioning into a wetter season.
As summer transitions into autumn, September in the City of Westminster reveals a notable rise in humidity levels, reaching 82%, which is a pleasant shift from the drier conditions experienced in the peak months of July and August. This uptick marks a return toward the more humid months of earlier in the year, with September typically signaling a gradual buildup toward the wetter autumn months ahead. Following this month, October and November see humidity soar again to 90% and 92%, respectively, emphasizing the city's seasonal cycle where moisture levels significantly impact the character of the region's climate. The moderate humidity in September thus sets the stage for a moisture-laden fall, providing a comforting ambiance even as temperatures begin to cool.
As summer transitions to autumn, September in the City of Westminster, United Kingdom, experiences a UV Index of 6, categorizing it as high exposure. This signifies a steep decline from the peak summer months of July and June, which both saw a maximum UV Index of 8 (very high). With a burn time of just 25 minutes, it's essential for residents and visitors alike to remain vigilant about sun safety during this month. The UV Index in September reflects the changing season, yet still emphasizes the importance of protection when enjoying the outdoors. For more detailed insights on UV levels, visit the City of Westminster UV Index page.
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As summer gracefully transitions into autumn, September in the City of Westminster showcases a delightful average of 300 hours of sunshine. This marks a significant dip from the sun-drenched heights of July, which boasts an impressive 404 hours, yet it remains a warm embrace compared to the chill of the coming months. The month stands out as a celebratory farewell to summer, bridging the vibrant sunshine of late summer with the settling shades of fall. September's sunshine serves as a gentle reminder of nature's cycle, softening the transition from the exuberance of July and August while setting the stage for the quieter, more subdued months ahead. This trend highlights the city's enduring charm and its ability to bask in golden rays, even as daylight begins to wane into the cooler months.
In the City of Westminster, September brings a moderate likelihood of sunny weather, with a 29% chance of sunshine. This percentage reflects a slight increase from the summer months of June and August, which are commonly viewed as peak sunshine periods, yet it remains lower than the vibrant 49% chance seen in April. Overall, September is transitional; as autumn begins to set in, the sun's presence can still brighten the days but is increasingly overshadowed by the encroaching chill of October, which has a 25% chance. This indicates a seasonal shift, where residents can still enjoy some sunny spells before autumn takes full swing.
As summer wanes in the City of Westminster, September ushers in a gentle transition with approximately 12 hours of daylight. This reduction signifies a gradual shift from the sun-drenched days of July and August, which bask in a generous 16 and 14 hours of sunlight, respectively. Following the peak brightness of June, as days shorten into October's 10 hours, September serves as a serene midpoint, where the lingering warmth of summer still competes with the encroaching chill of autumn. This pattern not only highlights the changing seasons but also invites residents and visitors alike to savor those golden hours before they retreat further into the embrace of shorter fall days.
As summer transitions into autumn, September brings a refreshing change to the City of Westminster, with average wind speeds settling around 3.3 m/s (7 mph). This marks a slight decrease from the breezier months of July and August, which maintained speeds of 3.3 m/s and 3.8 m/s, respectively. Overall, September is characterized by more tranquil breezes compared to the earlier months of the year; January kicks off with the highest average of 4.2 m/s (9 mph), showcasing a distinct seasonal shift. As the cooler air takes hold, residents can expect a gentler wind that complements the vibrant hues of autumn leaves, providing a serene backdrop to city life.
The weather in City of Westminster 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 City of Westminster and find detailed weather information for every month.
September and January showcase distinct weather patterns, with September offering a more temperate climate. The temperatures in September range from a minimum of 4°C (39°F) to a maximum of 28°C (83°F), providing an average of 15°C (59°F). In contrast, January presents a chilly experience, with temperatures dipping from -5°C (24°F) to a maximum of 14°C (58°F) and an average of just 5°C (41°F). Both months see similar precipitation levels, with September receiving 45 mm (1.8 in) over 10 days, while January has a slightly wetter climate with 54 mm (2.1 in) across the same number of days, although January’s higher humidity at 91% adds to the wintry feel. For more details, check out City of Westminster weather in January.
In September, temperatures range from a minimum of 4°C (39°F) to a maximum of 28°C (83°F), with an average of 15°C (59°F). This month typically sees around 45 mm (1.8 in) of precipitation over about 10 days, and humidity levels are around 82%. In contrast, February experiences colder weather, with minimum temperatures dropping to -5°C (23°F) and a maximum of 18°C (65°F), resulting in an average of 6°C (43°F). Precipitation slightly increases to 53 mm (2.1 in) over 11 days, along with higher humidity at 89%. For more detailed information on February weather, visit City of Westminster weather in February.
When comparing the weather in September and March, notable contrasts emerge. September boasts a milder temperature range with a minimum of 4°C and an average of 15°C, while March experiences colder conditions, starting from a minimum of -5°C and averaging just 7°C. Though both months see some rainfall, March has slightly higher precipitation at 54 mm over 13 days compared to September's 45 mm over 10 days. Additionally, humidity levels are slightly elevated in March at 86%, compared to 82% in September. For a detailed look at the climate specifics, you can refer to this link: City of Westminster weather in March.
When comparing the weather in September and April, notable differences emerge. In September, temperatures range significantly from a chilly 4°C (39°F) at night to a warm 28°C (83°F) during the day, with an average temperature of 15°C (59°F). The month experiences about 45 mm (1.8 in) of precipitation spread over 10 days, accompanied by a humidity level of 82%. In contrast, April starts cooler, with nighttime temperatures dropping to -2°C (29°F) and daytime highs reaching up to 26°C (80°F), yielding an average of 10°C (49°F). Rainfall is lighter at 33 mm (1.3 in), occurring over 8 days, with slightly higher humidity at 85%. For more insights into April's weather, visit City of Westminster weather in April.
In comparing the weather of September and May, September tends to be warmer overall, with an average temperature of 15°C (59°F) and a maximum reaching 28°C (83°F), while May has a cooler average temperature of 13°C (55°F) and a maximum of 25°C (78°F). September experiences slightly less precipitation at 45 mm (1.8 in) over about 10 days, compared to May's 62 mm (2.5 in) across 11 days. Moreover, humidity levels remain relatively high in both months, with September at 82% and May at 79%. For more specific details on May's weather, you can refer to City of Westminster weather in May.
In September, the weather begins to cool down, with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 28°C (83°F) and an average of 15°C (59°F). The month experiences 45 mm (1.8 in) of precipitation over about 10 days, accompanied by relatively high humidity at 82%. In contrast, June tends to be warmer, featuring a minimum temperature of 7°C (45°F), an average temperature of 16°C (62°F), and a maximum of 31°C (89°F). It also sees increased precipitation at 77 mm (3.0 in) over 9 days, with humidity slightly lower at 80%. For more detailed information, you can check the City of Westminster weather in June.
In comparing the weather of September and July, September generally experiences cooler temperatures, with minimums dropping to 4°C (39°F) compared to July’s minimum of 9°C (49°F). The average temperature in September is around 15°C (59°F), which is notably lower than July’s warmer average of 18°C (65°F). However, July can see maximum temperatures soaring up to 36°C (96°F), significantly higher than September’s peak of 28°C (83°F). Additionally, precipitation levels are higher in July, with 64 mm (2.5 in) of rain compared to 45 mm (1.8 in) in September, although both months experience roughly the same number of rainy days. Humidity is also higher in September at 82%, while July has a more comfortable humidity level of 71%. For more detailed information, you can refer to City of Westminster weather in July.
In comparison, September experiences cooler temperatures than August, with minimums dropping from 8°C (47°F) in August to 4°C (39°F) in September. The average temperature also lowers from 18°C (64°F) in August to 15°C (59°F) in September, while maximum temperatures reduce significantly from 34°C (93°F) in August to 28°C (83°F) in September. Furthermore, September sees a slight decrease in total precipitation with 45 mm (1.8 in) over 10 days, compared to August’s 70 mm (2.7 in) over 12 days. Humidity in September is higher at 82%, compared to August's 76%. For more details, you can check the City of Westminster weather in August.
September offers a warmer climate with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 28°C (83°F), averaging around 15°C (59°F). With 45 mm (1.8 in) of rainfall over about 10 days, humidity levels are somewhat lower at 82%. In contrast, October experiences a noticeable drop in temperature, with a minimum of 1°C (34°F), an average of 12°C (54°F), and a maximum of 22°C (73°F). Precipitation increases to 84 mm (3.3 in) spread over 12 days, contributing to a higher humidity level of 90%. For a more detailed look, you can check the City of Westminster weather in October.
September tends to be milder than November, with average temperatures ranging from a minimum of 4°C (39°F) to a maximum of 28°C (83°F). In contrast, November sees cooler weather, with temperatures dropping to a minimum of -2°C (29°F) and peaking at 16°C (62°F). In terms of precipitation, September receives about 45 mm (1.8 in) over approximately 10 days, while November has slightly more rainfall at 52 mm (2.0 in) across 11 days. Additionally, humidity levels rise in November to 92%, compared to September's 82%. For more detailed insights, you can check City of Westminster weather in November.
In September, temperatures are generally milder with a minimum of 4°C (39°F) and an average of 15°C (59°F), reaching up to a pleasant 28°C (83°F) on warmer days. The month experiences 45 mm (1.8 in) of precipitation spread over about 10 days, and humidity sits at a comfortable 82%. In contrast, December brings a notable chill, with temperatures dipping as low as -4°C (24°F) and an average of just 6°C (44°F), peaking at 14°C (58°F). This winter month sees increased rainfall, totaling 84 mm (3.3 in) over 13 days, alongside higher humidity at 92%. For a more detailed look at the December climate in this area, you can visit City of Westminster weather in December.
As September rolls in, the weather in the City of Westminster marks a notable transition from the warmth of summer to the crispness of autumn. While temperatures can still hit a maximum of 28°C, the average drops to a more moderate 15°C, creating a refreshing contrast. Rain is more frequent this month, with 10 days of precipitation contributing to the 45 mm accumulation, which can catch visitors off guard. Additionally, the increasing humidity at 82% adds a layer of discomfort, signaling it’s time to pack away those summer outfits in favor of lightweight layers. For more insights into the diverse weather patterns throughout the year, explore the City of Westminster Climate.