September Weather in Twickenham, United Kingdom

Last updated: March 17, 2025

September in Twickenham showcases a pleasing blend of mild temperatures and occasional rainfall, making it an ideal time for outdoor activities. The maximum temperature reaches a warm 28°C (83°F), while the average hovers around a comfortable 15°C (59°F). However, the minimum can dip as low as 4°C (39°F), reminding residents of the seasonal shift. With 45 mm (1.8 in) of precipitation over approximately 10 days, the month experiences a damp yet refreshing aura, enhanced by an 82% humidity level. This unique weather combination contributes to Twickenham’s lush landscapes, inviting both locals and visitors to enjoy the charm of early autumn.

September Temperature in Twickenham

In September, Twickenham experiences a delightful transition into autumn, characterized by a minimum temperature of 4°C (39°F) and a comfortable average of 15°C (59°F). The days are still warm, with maximum temperatures reaching a pleasant 28°C (83°F), offering a perfect blend of warmth and coolness as summer bids farewell. This month notably marks a shift from the scorching heat of July and August, as temperatures gradually decline, yet the lingering warmth allows for enjoyable outdoor activities. As the days shorten and leaves start to turn, September presents an ideal backdrop for those looking to embrace the beauty of early fall in the United Kingdom.

September Weather in Twickenham: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Twickenham, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec414345495562656459534643
Data source: Temperature data for Twickenham generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Twickenham

In September, Twickenham experiences a moderate precipitation total of 45 mm (1.8 in), which is a step down from the preceding months of summer. With rainfall occurring on approximately 10 days, this fall month signals the transition towards a wetter season. While still retaining some warmth, the shift in weather patterns can be felt in the decreased rainfall compared to August's 70 mm (2.7 in) and July's 64 mm (2.5 in). The trend indicates a gradual increase in precipitation as the year progresses towards more heavily saturated months, with October's average soaring to 84 mm (3.3 in). This pattern underscores the dynamic weather changes characteristic of Twickenham, as the crisp autumn days begin to take hold.

September Precipitation Trends in Twickenham

The chart displays monthly precipitation patterns in Twickenham, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec545354336277647045845284
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Twickenham

As September unfolds in Twickenham, the humidity levels begin to reflect the transitional shift from summer to autumn, stabilizing at 82%. This marks a notable drop from the muggy highs of August, which averaged 76%, yet remains significantly elevated compared to the drier months of late spring and early summer. Throughout the year, Twickenham experiences its highest humidity during the winter months, peaking at an impressive 91% in January and gradually tapering off to a more comfortable 71% in the warmth of July. However, as autumn approaches, the humidity edges back up, hinting at the damp and crisp conditions typical of the season. This cyclical fluctuation not only shapes the local climate but also sets the stage for the lush greenery that characterizes Twickenham's landscape as it transitions through the year.

September Average Humidity in Twickenham

This chart illustrates the average monthly humidity levels in Twickenham, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%86%85%79%81%71%76%82%91%92%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Twickenham

As September rolls into Twickenham, the UV Index reaches a moderately high level of 6, indicating that sun protection is essential for outdoor activities. This marks a slight decrease from the intense summer months, where the UV Index peaked at 8 in both June and July, but still signifies a need for vigilance, with a burn time of just 25 minutes. Transitioning from summer, the UV Index notably shifts, dropping from its high values, yet remains higher than the earlier months of the year, where it sat at a mere 1 in January and 2 in February. With autumn approaching, understanding these trends in UV exposure—exemplified in the full range of data—can help residents adapt their outdoor plans accordingly. For a comprehensive breakdown of UV levels throughout the year, explore the detailed charts at Twickenham UV Index.

Maximum UV Index Levels in Twickenham for September

The chart shows the monthly maximum UV Index (UVI) for Twickenham in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec124578876421
Data source: Twickenham September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Twickenham

September in Twickenham ushers in a delightful transition as summer's warmth gracefully lingers, offering residents a generous 300 hours of sunshine. This month stands as a bright highlight in the year, following the peak of summer in July with its impressive 404 hours of sun. As early autumn approaches, there is a steady decline in sunlight, yet September retains a remarkable glow compared to the darker winter months ahead, which slump to 144 hours in November and 109 hours in December. This pattern reveals a clear trend: while daylight diminishes as the year progresses, September serves as a poignant reminder of summer's last embrace, inviting everyone to savor the sunlight before the colder months set in.

Monthly Sunshine Duration in Twickenham: September Highlighted

The September sunshine duration represents the total number of hours Twickenham experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec98h148h210h319h398h389h404h368h300h241h144h109h
Data source: Twickenham September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Twickenham During September

As September rolls into Twickenham, the chances of enjoying sunny weather remain moderate, with a 29% likelihood of sunshine. This month follows a pattern where the warmth of summer gives way to early autumn's unpredictability. Notably, September's sun chance mirrors that of March, suggesting a balance between lingering summer vibes and the onset of cooler days. It stands in contrast to April's peak with 49%, when vibrant blooms promise more consistent sunshine. As you step into the month, be prepared for the occasional bright day, nestled among the shifting clouds typical of early autumn in the UK.

Percentage of Sunny Days in September in Twickenham

The chart illustrates the percentage of sunny days in Twickenham throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Twickenham experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec19%25%29%49%33%28%38%25%29%25%32%17%
Data source: Twickenham September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Twickenham in September

As summer gives way to autumn in Twickenham, September brings a noticeable transition in daylight duration, with the sun shining for approximately 12 hours each day. This marks a gradual decline from the peak of 16 hours experienced in June and July. As the days shorten, the vibrant hues of autumn begin to emerge, with sunlight reducing to around 14 hours in August before settling into October's shorter 10 hours. The trend reflects a natural progression from the long, bright summer days into the cooler, crisper atmosphere of fall, inviting residents to relish each fleeting hour of daylight before the winter months set in.

Average Daylight Hours in Twickenham for September

The chart illustrates the variation in daylight duration in Twickenham throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 23m9h 58m11h 55m13h 54m15h 38m16h 32m16h 3m14h 30m12h 35m10h 36m8h 50m7h 53m
Data source: Twickenham daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Twickenham

In September, Twickenham experiences a gentle breeze, with an average wind speed of 3.3 m/s (7 mph), aligning with the calmer conditions of summer months. As this transitional month unfolds, the wind eases from August's slightly brisker pace, hinting at the onset of autumn. Compared to the year's earlier months, September's winds remain on the lower end, illustrating a gradual retreat from the lively spring and summer breezes, which feature speeds peaking in February and March at 4.7 m/s and 4.4 m/s, respectively. This month serves as a reminder of nature's soothing rhythms, preparing the landscape for the shifting winds and cooler temperatures that will follow in October and beyond.

Average September Wind Speed in Twickenham

The chart displays monthly wind speed patterns in Twickenham, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec4.24.74.43.54.23.13.33.83.3 m/s4.43.84.4
Data source: Twickenham September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Twickenham Compares to Other Months

The weather in Twickenham 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 Twickenham and find detailed weather information for every month.

In September, the weather is typically mild, with average temperatures ranging from a minimum of 4°C (39°F) to a maximum of 28°C (83°F). The month experiences about 45 mm (1.8 in) of precipitation over approximately 10 days, accompanied by a humidity level of 82%. In contrast, January brings much colder conditions, with temperatures averaging between -5°C (24°F) and 14°C (58°F). Precipitation increases slightly to 54 mm (2.1 in) over the same number of days, and humidity rises to 91%. For more details on January weather patterns, you can explore Twickenham weather in January.

In comparing the weather between September and February, we see significant differences in temperature and precipitation. September boasts a mild average temperature of 15°C (59°F), with daytime highs reaching up to 28°C (83°F), contrasted with February's cooler average of 6°C (43°F) and maximums of only 18°C (65°F). Precipitation levels are fairly close, with September receiving 45 mm (1.8 in) over 10 days, while February sees slightly more at 53 mm (2.1 in) over 11 days. Furthermore, the humidity is higher in February at 89%, compared to 82% in September. For a closer look at February weather specifics, visit Twickenham weather in February.

September typically brings warmer temperatures than March, with minimums around 4°C (39°F) and averages reaching 15°C (59°F). In contrast, March can start quite cold with minimums dipping to -5°C (23°F) and an average of only 7°C (46°F). Despite September's pleasant warmth, it also sees 45 mm of rainfall over about 10 days, while March has slightly higher precipitation at 54 mm but over 13 days, leading to a wetter feel. Humidity levels are relatively close, with September at 82% and March slightly higher at 86%. For more detailed insights on March weather, you can check Twickenham weather in March.

When comparing the weather in September and April, we see notable differences in temperature and precipitation patterns. September experiences milder conditions with average temperatures ranging from a minimum of 4°C (39°F) to a maximum of 28°C (83°F), while April's temperatures are generally cooler, with a minimum of -2°C (29°F) and a maximum of 26°C (80°F). September also has a slightly higher average rainfall of 45 mm (1.8 in) over about 10 days, compared to April's 33 mm (1.3 in) over 8 days. Humidity levels are relatively similar in both months, with September at 82% and April slightly higher at 85%. For more detailed insights into April weather, you can check Twickenham weather in April.

In comparing the weather of September and May, September typically enjoys warmer temperatures, with averages peaking at 15°C (59°F) and reaching highs of 28°C (83°F), while May has a slightly cooler average of 13°C (55°F) and maximum temperatures of 25°C (78°F). However, May experiences slightly more precipitation, with a total of 62 mm (2.5 in) falling over 11 days, compared to September’s 45 mm (1.8 in) over 10 days. Humidity levels are comparable, with September at 82% and May at 79%. For those interested in more detailed information, you can view the Twickenham weather in May.

When comparing the weather in September and June, one can observe notable differences in temperature and precipitation patterns. September tends to have a lower minimum temperature of 4°C (39°F) compared to June's 7°C (45°F), but the average temperatures are relatively similar, with September averaging 15°C (59°F) and June at 16°C (62°F). However, June boasts a higher maximum temperature, reaching up to 31°C (89°F), while September peaks at a more moderate 28°C (83°F). Precipitation levels also show a variation, with September receiving 45 mm (1.8 in) over approximately 10 days, while June has a higher total of 77 mm (3.0 in) across about 9 days. Humidity levels are fairly similar, with September at 82% and June slightly lower at 80%. For more detailed insights, you can explore Twickenham weather in June.

September weather in Twickenham tends to be cooler than July, with minimum temperatures dropping to around 4°C (39°F) compared to July's 9°C (49°F). The average temperature in September is a comfortable 15°C (59°F), while July enjoys a warmer average of 18°C (65°F). On hot days, September can reach a maximum of 28°C (83°F), significantly lower than July’s peak of 36°C (96°F). Precipitation is slightly lower in September, totaling 45 mm (1.8 in) over about 10 days, compared to 64 mm (2.5 in) across 11 days in July. Additionally, September sees higher humidity levels at 82%, compared to July's 71%. For a deeper look into July’s weather patterns, check out Twickenham weather in July.

In comparing the weather of September and August, September tends to be cooler with a minimum temperature of 4°C (39°F) and an average of 15°C (59°F), while August enjoys warmer conditions, with minimums around 8°C (47°F) and an average temperature of 18°C (64°F). The maximum temperatures reflect this trend as well, with September peaking at 28°C (83°F) compared to August's high of 34°C (93°F). Additionally, September sees less precipitation overall at 45 mm (1.8 in) across 10 days, while August experiences more rain, totaling 70 mm (2.7 in) over 12 days. Humidity levels are also slightly higher in September at 82%, compared to 76% in August. For more detailed insights on August weather, you can visit Twickenham weather in August.

In September, the weather is characterized by warmer temperatures, with a minimum of 4°C (39°F), an average of 15°C (59°F), and a maximum of 28°C (83°F). This month sees relatively moderate precipitation, totaling 45 mm (1.8 in) over about 10 days, with humidity levels around 82%. In contrast, October brings cooler temperatures, where the minimum drops to 1°C (34°F) and the average decreases to 12°C (54°F), with a maximum of 22°C (73°F). The month is also wetter, receiving 84 mm (3.3 in) of precipitation across 12 days, and humidity rises to 90%. For a closer look at the October weather, you can check out Twickenham weather in October.

September typically offers milder temperatures with a minimum of 4°C (39°F) and an average of 15°C (59°F), reaching up to 28°C (83°F) at its hottest. The weather is relatively dry with 45 mm (1.8 in) of precipitation over about 10 days, and humidity levels are moderate at 82%. In contrast, November brings a cooler climate, with minimum temperatures dropping to -2°C (29°F) and an average of 8°C (47°F), peaking at 16°C (62°F). There is a slight increase in precipitation, totaling 52 mm (2.0 in) over 11 days, and humidity levels rise to 92%, making it feel considerably more damp. For more details, you can check the Twickenham weather in November.

In September, the weather is generally mild 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). The month sees around 45 mm (1.8 in) of precipitation over approximately 10 days, accompanied by a humidity level of 82%. In contrast, December brings colder temperatures, with a minimum of -4°C (24°F) and a maximum of 14°C (58°F), averaging just 6°C (44°F). This month experiences higher precipitation of 84 mm (3.3 in) over about 13 days, with humidity rising to 92%. For more details, check out Twickenham weather in December.

Compare Twickenham's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Twickenham

As summer transitions into autumn, September in Twickenham showcases a delightful range of temperatures, balancing warm days and cooler nights. With an average temperature of 15°C, the month brings a noticeable shift from the heat of summer, offering refreshing breezes and a hint of crispness in the air. While rainfall does make an appearance, with precipitation occurring on about a third of the days, it serves to nourish the lush landscape rather than dampen the spirits. The high humidity levels create a unique feel, reminiscent of late summer, yet the overall atmosphere begins to hint at the approaching fall. For a deeper insight into how weather patterns evolve year-round, explore the full details at Twickenham Climate.