September Weather in Eton, United Kingdom

Last updated: March 17, 2025

In September, Eton, United Kingdom, experiences a diverse weather pattern characterized by a maximum temperature of 28°C (83°F) and an average of 15°C (59°F). The minimum temperature can drop to 3°C (38°F), providing a refreshing contrast. With a total precipitation of 45 mm (1.8 in) spread across approximately 10 days, residents and visitors can expect occasional showers amidst the crisp autumn atmosphere. The humidity level, hovering around 82%, enhances the invigorating feel of the season, making September an ideal time to enjoy Eton's stunning landscapes and rich history.

September Temperature in Eton

September in Eton, United Kingdom, marks a transitional moment as the warmth of summer gives way to the crispness of autumn. With average temperatures around 15°C (59°F), visitors can expect pleasant days, while nighttime lows dip to 3°C (38°F). The maximum temperature can reach a comfortable 28°C (83°F), making it one of the warmer months of the year, approaching the lingering warmth of August. As the month progresses, the days begin to shorten, hinting at the cooler months ahead. This blend of lingering warmth and the gentle onset of autumn invites both locals and tourists to enjoy outdoor activities, showcasing the enchanting beauty of the changing seasons in Eton.

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

The chart illustrates September temperature patterns in Eton, 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 Eton 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 Eton

In September, Eton experiences a moderate precipitation total of 45 mm (1.8 in), marking a noticeable drop from the preceding summer months. This decline in rainfall, observed after the wettest periods of June and August, typically sees around 10 days of rain throughout the month. As autumn approaches, the frequency of precipitation begins to stabilize, setting the stage for the wetter conditions that define the coming months. With its blend of crisp air and decreasing rainfall, September offers a beautiful transition that hints at the vibrant colors of fall, making it a month of significant change in Eton's weather landscape.

September Precipitation Trends in Eton

The chart displays monthly precipitation patterns in Eton, 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.
JanFebMarAprMayJunJulAugSepOctNovDec525255336374646745865382
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Eton

September in Eton, United Kingdom, marks a transition in humidity levels as summer gives way to autumn. With an average humidity of 82%, September sits comfortably between the drier months of July (71%) and August (76%), and the wetter onset of fall as October approaches, reaching 90%. This subtle uptick in moisture reflects the changing seasons, as cooler temperatures and the arrival of more frequent rain begin to impact the air's saturation. Overall, the trend shows a gradual rise in humidity from the dry summer months, setting the stage for a wetter and cooler climate as the year progresses.

September Average Humidity in Eton

This chart illustrates the average monthly humidity levels in Eton, 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 Eton

As September rolls in, Eton, United Kingdom, experiences a UV Index of 6, categorizing the exposure as high. This trend marks a slight decrease from the peak summer months of July and August, both boasting an UV Index of 8. While September's burn time remains consistent at 25 minutes, it is essential for residents and visitors to remain vigilant when outdoors. The UV Index trend throughout the year shows a gradual rise from the low readings of winter to the heightened levels of summer, underscoring the importance of sun protection during these transition months. For more detailed information, visit Eton UV Index.

Maximum UV Index Levels in Eton for September

The chart shows the monthly maximum UV Index (UVI) for Eton 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: Eton 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 Eton

In Eton, United Kingdom, September marks a delightful transition as summer gracefully hands over to autumn, basking in 300 hours of sunshine. This month stands out with a commendable yield of daylight, following the peak of summer where July dazzled with 404 hours of sun. As the vibrant days of May and June, with their impressive 398 and 389 hours, fade into a more mellow climate, September retains a warm glow before the sun’s presence begins to wane in October, which sees a drop to 241 hours. The drop in sunlight may suggest a shift towards the cozy allure of fall, but September’s warmth still invites lingering outdoor activities amidst a tapestry of changing leaves.

Monthly Sunshine Duration in Eton: September Highlighted

The September sunshine duration represents the total number of hours Eton 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: Eton September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Eton During September

In Eton, United Kingdom, the likelihood of sunny weather remains relatively modest in September, with a 28% chance of sunshine. This statistic suggests a slight uptick compared to the summer months, where July peaks at 38% but falls off in August to 24%. As we transition into autumn, the sun's presence diminishes, maintaining consistency with the earlier months of the year. Notably, September still holds on to a better chance than January and December, which hover around 20% and 17% respectively. While the early signs of fall might bring an increasing amount of cloud cover, the potential for pleasant sunny days in September lingers, offering a fleeting opportunity to enjoy the season before the chill sets in.

Percentage of Sunny Days in September in Eton

The chart illustrates the percentage of sunny days in Eton 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 Eton experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec20%25%29%50%33%27%38%24%28%26%32%17%
Data source: Eton September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Eton in September

As summer fades, September in Eton, United Kingdom, marks a shift from the long, sun-drenched days of July and August, which basked in 16 hours of daylight. Now, the daylight gently recedes to a more moderate 12 hours. This gradual decline hints at the impending autumn, with the sun setting earlier in the evening. Compared to earlier months, daylight during September is noticeably less than May's 15 hours and June's peak, yet it offers a comfortable balance for those looking to enjoy the remaining warmth of the season. The transition underscores the rhythm of the year as nature prepares for the cozy embrace of autumn, following the vibrant energy of summer.

Average Daylight Hours in Eton for September

The chart illustrates the variation in daylight duration in Eton throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 24m9h 58m11h 55m13h 54m15h 38m16h 32m16h 3m14h 30m12h 35m10h 36m8h 50m7h 53m
Data source: Eton daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Eton

As September rolls into Eton, the wind takes on a quieter demeanor, with an average speed of 3.3 m/s (7 mph), marking one of the calmer months of the year. This gentle breeze follows a summer lull and hints at the freshening gusts of autumn that lie ahead. Notably, September's wind speed mirrors the soft, welcoming whispers of late summer, after which we see a notable uptick in October, when winds return to a brisk 4.4 m/s (10 mph). Comparatively, the earlier months of the year boasted stronger winds, peaking in January and December at 4.3 m/s (10 mph). In contrast, the decline in wind strength during the late summer months suggests a shift in the season, providing a soothing transition as Eton approaches the vibrant yet blustery days of autumn.

Average September Wind Speed in Eton

The chart displays monthly wind speed patterns in Eton, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.34.84.43.54.33.23.33.83.3 m/s4.43.94.5
Data source: Eton September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Eton Compares to Other Months

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

September and January display contrasting weather patterns. In September, temperatures range from a chilly 3°C (38°F) at night to a pleasant maximum of 28°C (83°F) during the day, with an average temperature of 15°C (59°F). The month experiences moderate precipitation of 45 mm (1.8 in) over about 10 days, accompanied by relatively high humidity at 82%. In stark contrast, January's temperatures dip significantly, with a minimum of -5°C (23°F) and a maximum of only 14°C (58°F), averaging just 5°C (41°F). The month sees slightly higher precipitation at 52 mm (2.1 in) over 9 days, and the humidity also rises to 91%. For more detailed information, you can check Eton weather in January.

In comparing the weather conditions of September and February, we notice notable differences in temperature and humidity. September presents a much warmer climate with average temperatures ranging from a minimum of 3°C (38°F) to a maximum of 28°C (83°F), while February is significantly cooler, with temperatures dipping to a minimum of -5°C (23°F) and averaging only 6°C (43°F). Both months experience precipitation on about 10 days, with September receiving slightly less at 45 mm (1.8 in) compared to February's 52 mm (2.0 in). Additionally, February has higher humidity levels at 89%, compared to September's 82%, which can contribute to a chillier feel even when temperatures rise. For more detailed information, you can check Eton weather in February.

When comparing the weather in September and March, we notice distinct differences in temperature and precipitation patterns. September enjoys milder conditions with average temperatures ranging from 3°C (38°F) to 28°C (83°F), while March sees a cooler range from -5°C (23°F) to 22°C (71°F). Although September has lower precipitation at 45 mm (1.8 in) over about 10 days, March tends to be wetter, recording 55 mm (2.2 in) across 13 days. Humidity levels are also slightly higher in March at 86%, compared to September's 82%. For a more detailed look at March weather specifically, you can check out Eton weather in March.

When comparing the weather in September and April, we see notable differences in temperature and precipitation. September generally offers warmer conditions with average temperatures around 15°C (59°F) and maximums reaching 28°C (83°F), while April's average temperature is cooler at 10°C (49°F) and can drop to a minimum of -2°C (29°F). Despite September having more rainfall in total at 45 mm (1.8 in) over approximately 10 days, April's precipitation is slightly less at 33 mm (1.3 in) over 8 days. Both months feature high humidity, with September at 82% and April slightly higher at 85%. For more detailed information about April weather, you can visit Eton weather in April.

When comparing the weather in September and May, one can observe distinct differences and similarities. September typically experiences slightly warmer average temperatures, with a minimum of 3°C (38°F) and a maximum of 28°C (83°F), making it more conducive to outdoor activities than May, which has a minimum temperature of 1°C (35°F) and a maximum of 26°C (78°F). However, May has a higher precipitation level at 63 mm (2.5 in) compared to September's 45 mm (1.8 in), even though both months see rainfall on about 10 days. Additionally, while the humidity is slightly higher in September at 82%, May remains comfortable at 79%. For more specific information about May's weather, you can check Eton weather in May. Overall, both months present unique weather patterns that cater to different preferences and activities.

September and June exhibit distinct weather patterns, reflecting the transition from summer to autumn. In September, temperatures range from a minimum of 3°C (38°F) to a maximum of 28°C (83°F), with an average of 15°C (59°F), while June enjoys milder temperatures with a minimum of 7°C (45°F), an average of 16°C (62°F), and peaks at 31°C (88°F). Rainfall differs, as September sees about 45 mm (1.8 in) over 10 days, compared to June's 74 mm (2.9 in) across 9 days. Additionally, humidity levels are slightly higher in September at 82%, compared to June's 80%. For those interested in a more detailed look at June weather, visit Eton weather in June.

In comparing the weather of September and July, it's clear that July tends to be warmer and more humid. The minimum temperature in July is significantly higher at 9°C (48°F), with an average of 18°C (65°F) and highs reaching up to 35°C (96°F). In contrast, September starts cooler, with minimums dropping to 3°C (38°F) and average temperatures around 15°C (59°F), peaking at 28°C (83°F). Additionally, July sees more precipitation overall, with 64 mm (2.5 in) across 11 days, compared to September's 45 mm (1.8 in) over 10 days. The humidity also differs, being higher in September at 82% compared to July's 71%. For more specific details about July weather, check out Eton weather in July.

In comparing the weather between August and September, we observe a notable shift in temperatures and precipitation patterns. September experiences a wider temperature range, with minimums dropping to 3°C (38°F) and maximums reaching 28°C (83°F), contributing to an average temperature of 15°C (59°F). In contrast, August boasts warmer conditions, with minimum temperatures of 8°C (46°F) and highs hitting 33°C (92°F), yielding an average of 18°C (64°F). Additionally, September sees slightly less precipitation at 45 mm (1.8 in) over 10 days, compared to August's 67 mm (2.6 in) across 12 days. Humidity levels are also higher in September at 82%, versus 76% in August. For a detailed look at August weather in Eton, you can check out Eton weather in August.

September typically offers milder weather, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 28°C (83°F) and an average of 15°C (59°F). With 45 mm (1.8 in) of precipitation over about 10 days, humidity sits at 82%, creating a comfortable atmosphere for outdoor activities. In contrast, October ushers in cooler conditions with temperatures dropping to a minimum of 1°C (34°F) and peaking at 23°C (73°F), averaging 12°C (53°F). This month experiences a significant increase in precipitation, totaling 86 mm (3.4 in) over 12 days, along with higher humidity levels at 90%. For more insights, you can check Eton weather in October.

September and November present markedly different weather patterns. In September, temperatures range from a mild 3°C (38°F) at night to a warm 28°C (83°F) during the day, with an average temperature of 15°C (59°F). The month sees a total precipitation of 45 mm (1.8 in) over about 10 days, accompanied by a relatively lower humidity of 82%. Conversely, November experiences colder temperatures, with a minimum of -2°C (29°F) and a maximum of 16°C (62°F), resulting in an average of 8°C (47°F). Precipitation increases slightly to 53 mm (2.1 in) spread across 11 days, and the humidity rises to 92%. For more detailed weather insights, you can check Eton weather in November.

September and December offer contrasting weather experiences. In September, temperatures typically range from a mild 3°C (38°F) at night to a warm 28°C (83°F) during the day, with an average of 15°C (59°F). The month sees about 45 mm (1.8 in) of precipitation over approximately 10 days, accompanied by humidity levels around 82%. In stark contrast, December brings much colder weather, with temperatures plunging to a minimum of -4°C (24°F) and a maximum of only 14°C (58°F), averaging 6°C (44°F). Rainfall increases to 82 mm (3.2 in) over 14 days, and humidity rises to 92%. For more details on the conditions during this month, visit Eton weather in December.

Compare Eton's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Eton

As the summer fades, September in Eton presents a transition into cooler temperatures and increased rainfall. While you may still experience the occasional warm day, the month is characterized by a significant drop from the peak heat of August, with an average temperature that hovers around a refreshing 15°C. The likelihood of rain also rises, with about 10 days of precipitation contributing to a total of 45 mm, leading to a more humid atmosphere with levels reaching 82%. This blend of conditions makes September a unique and often unpredictable month, paving the way for autumn's arrival. For a detailed overview of what to expect, visit Eton Climate.