September Weather in Windermere, United Kingdom

Last updated: March 17, 2025

In Windermere, United Kingdom, September offers a delightful mix of weather characteristics that highlight the transition into autumn. The maximum temperature reaches a pleasant 26°C (79°F), while the average temperature hovers around a mild 12°C (55°F). Visitors can expect cooler evenings, with temperatures dipping to a minimum of 2°C (36°F). However, September also brings considerable rainfall, accumulating to 128 mm (5.0 in) over the month and resulting in 17 rainy days. With humidity levels around 88%, the atmosphere remains moist, adding to the region's lush landscapes and vibrant scenery. Whether you're enjoying the mild days or cozying up during the rainy spells, September in Windermere remains a captivating experience for nature lovers and adventurers alike.

September Temperature in Windermere

As September arrives in Windermere, the weather begins to hint at the transition from summer’s warmth to autumn's chill. With a minimum temperature of 2°C (36°F), nights start to grow crisper, but the average temperature reaches a pleasant 12°C (55°F), ideal for outdoor exploration. Daytime temperatures can still climb to a comfortable max of 26°C (79°F), reminiscent of the lingering summer heat, making it a perfect time for lake activities or hiking in the stunning scenery. This month marks a pivotal shift, where the warmth of summer meets the cooler embrace of fall, encouraging both outdoor adventures and cozy evenings by the fire.

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

The chart illustrates September temperature patterns in Windermere, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec394042455156595854494441
Data source: Temperature data for Windermere 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 Windermere

September in Windermere, United Kingdom, sees a noteworthy precipitation total of 128 mm (5.0 inches) spread over 17 days, marking it as a transitional month as summer wanes and autumn sets in. This month typically experiences a rise in rainfall compared to the drier April and May, while still significantly lower than the deluge expected in October, which averages 174 mm. The consistent frequency of rain-filled days during September indicates a pattern of gradual increase as the weather closes in on winter, with frequent showers setting the stage for the lush, vibrant landscapes that characterise the Lake District during this time of year. This trend hints at the region’s reputation for changeable weather, reminding visitors that even as the leaves begin to turn, one should always be prepared for a splash of rain.

September Precipitation Trends in Windermere

The chart displays monthly precipitation patterns in Windermere, 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.
JanFebMarAprMayJunJulAugSepOctNovDec991561345473112108151128174123142
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Windermere

September in Windermere, United Kingdom, showcases a notable rise in humidity, reaching 88%. This slight increase from the summer months, where humidity hovered around 82%, highlights a transition into the wetter autumn season. As the year progresses, humidity tends to climb, peaking in the later months—90% in October and 92% in November—illustrating the damp climate typical of the region. This trend of fluctuating humidity reflects Windermere's unique maritime climate, where each month brings its own atmospheric character, weaving a complex and captivating weather narrative.

September Average Humidity in Windermere

This chart illustrates the average monthly humidity levels in Windermere, 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.
JanFebMarAprMayJunJulAugSepOctNovDec90%88%86%85%81%83%82%82%88%90%92%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Windermere

As summer transitions into autumn in Windermere, United Kingdom, September marks a shift in the UV Index, dipping to 5, which falls into the moderate exposure category. This change signifies a welcome reprieve from the very high levels experienced in July and June, where sun protection was essential within just 15 minutes. With burn times extending to 30 minutes in September, it's still vital to be cautious during midday, but outdoor enthusiasts can enjoy the crisper weather and beautiful scenery with a bit more flexibility. Following September, the UV Index continues its gradual decline, dropping to 3 in October and signaling the approach of winter. For those keen on tracking UV levels throughout the year, detailed information is available at Windermere UV Index.

Maximum UV Index Levels in Windermere for September

The chart shows the monthly maximum UV Index (UVI) for Windermere 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.
JanFebMarAprMayJunJulAugSepOctNovDec124578875321
Data source: Windermere 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 Windermere

As summer's warmth wanes, September in Windermere ushers in a gentle transition, boasting 296 hours of sunshine. This marks a decline from the sun-soaked heights of July and August, yet it remains a satisfying reprieve from the dimmer months ahead. Following the vibrant month of May, which recorded the highest sunshine hours, September still holds its ground with a generous amount of sun, inviting outdoor enthusiasts to savor the lingering warmth. The gradual descent in daylight is evident as autumn approaches, highlighted by a contrast from the peak of summer but still offering enough light for nature lovers to explore the beauty of this picturesque UK destination.

Monthly Sunshine Duration in Windermere: September Highlighted

The September sunshine duration represents the total number of hours Windermere 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.
JanFebMarAprMayJunJulAugSepOctNovDec80h145h210h340h405h386h406h358h296h228h114h91h
Data source: Windermere September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Windermere During September

In Windermere, September signals the onset of autumn, which is reflected in its weather patterns. With a sunshine probability of just 18%, the chances for clear skies begin to dwindle as the month progresses. This marks a notable drop from the more favorable conditions of spring and summer, where the chances peaked at 50% in April. As temperatures cool and days shorten, the likelihood of overcast skies increases, hinting at the approaching winter months. Although glimpses of sun can still be enjoyed, September is not widely recognized for its sunny disposition in Windermere, making it a time to embrace the beauty of a changing season.

Percentage of Sunny Days in September in Windermere

The chart illustrates the percentage of sunny days in Windermere 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 Windermere experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec18%23%22%50%29%21%36%22%18%15%25%13%
Data source: Windermere September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Windermere in September

In September, Windermere experiences a notable transition in daylight duration, with approximately 12 hours of sunlight gracing each day. This marks a shift from the longer days of summer, where June and July bask in the glow of up to 17 hours of daylight. As autumn approaches, the daylight hours begin to shorten, following the peak of 16 hours in May and 14 hours in August. This gradual decline not only signals the end of the vibrant summer days but also invites a softer, more reflective atmosphere as daylight dwindles towards 10 hours in October. September captures this beautiful blend of lingering summer light and the early whispers of autumn, making it a unique time to enjoy the enchanting landscapes of Windermere.

Average Daylight Hours in Windermere for September

The chart illustrates the variation in daylight duration in Windermere throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec7h 57m9h 44m11h 54m14h 6m16h 4m17h 6m16h 33m14h 47m12h 38m10h 26m8h 27m7h 22m
Data source: Windermere daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Windermere

As September rolls in Windermere, the average wind speed settles comfortably at 3.0 m/s (7 mph), mirroring the gentle breezes of the preceding summer months. This slight consistency suggests a transition, as the winds are generally calmer compared to the blustery conditions typical of early autumn. With August also at 3.0 m/s, the region enjoys a mellow atmosphere, ideal for taking in the beautiful autumn hues as nature begins to prepare for winter. Looking ahead, average wind speeds are set to increase in October to 4.7 m/s (11 mph), signaling a brisk shift in the weather as the year progresses. Hence, September represents a serene interlude, a soothing breath before the winds gather strength in the months to come.

Average September Wind Speed in Windermere

The chart displays monthly wind speed patterns in Windermere, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.44.94.22.73.23.02.23.03.0 m/s4.74.23.8
Data source: Windermere September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Windermere Compares to Other Months

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

September and January present markedly different weather patterns. In September, temperatures typically range from a mild 2°C (36°F) at night to a warm 26°C (79°F) during the day, with an average of 12°C (55°F). The month receives considerable rainfall, totaling 128 mm (5.0 in) over approximately 17 days and features relatively high humidity at 88%. In contrast, January experiences much colder conditions with minimum temperatures dropping to -6°C (21°F) and a maximum of only 12°C (54°F), capped at an average of 4°C (39°F). The month is drier than September, with a total precipitation of 99 mm (3.9 in) across 13 days and slightly higher humidity at 90%. For more detailed information, you can check Windermere weather in January.

September and February present stark contrasts in weather. In September, temperatures range from a chilly 2°C (36°F) at night to a pleasant 26°C (79°F) during the day, with an average of 12°C (55°F). This month sees 128 mm (5.0 in) of rainfall over 17 days, accompanied by high humidity levels of 88%. In contrast, February is much colder, with nighttime lows plummeting to -8°C (19°F) and daytime highs capping at 16°C (62°F), averaging around 4°C (40°F). Precipitation rises slightly to 156 mm (6.1 in), also spread over 17 days, but humidity remains consistent at 88%. For more details on the chilly conditions, check out Windermere weather in February.

In comparing the weather between September and March, it is evident that September tends to be warmer and more pleasant overall. With temperatures ranging from a minimum of 2°C (36°F) to a maximum of 26°C (79°F), September averages around 12°C (55°F) and experiences high humidity levels of 88%. In contrast, March has a colder temperature range, with a minimum of -6°C (22°F) and a maximum of 16°C (62°F), resulting in an average of 5°C (42°F). Both months receive similar amounts of precipitation, with September recording 128 mm (5.0 in) and March slightly higher at 134 mm (5.3 in), occurring over 17 days in each month. For more detailed information about weather conditions during this time, check out Windermere weather in March.

In comparing the weather of September and April, it's clear that September features a more moderate temperature range, with minimums of 2°C (36°F) and maximums reaching 26°C (79°F), compared to April’s chillier minimum of -4°C (25°F) and maximum of 21°C (69°F). Additionally, September sees significantly higher precipitation, totaling 128 mm (5.0 in) over 17 days, while April has a milder rainfall of 54 mm (2.1 in) over just 10 days. Humidity levels are relatively similar, with September at 88% and April slightly lower at 85%. For more specific details about April's conditions, you can check Windermere weather in April.

September and May present distinct differences in weather patterns. In September, temperatures range from a minimum of 2°C (36°F) to a maximum of 26°C (79°F), with an average of 12°C (55°F). The month is notably wetter, receiving 128 mm (5.0 in) of precipitation over approximately 17 days, along with higher humidity levels at 88%. In contrast, May features a cooler temperature range, with a minimum of -1°C (31°F) and a maximum of 25°C (77°F), averaging at 10°C (51°F). The precipitation is also lighter, totaling 72 mm (2.9 in) over 14 days, accompanied by a slightly lower humidity of 80%. For a detailed view of the weather patterns, you can check Windermere weather in May.

In comparing the weather of September and June, we observe that September experiences slightly cooler temperatures, with a minimum of 2°C (36°F) and a maximum of 26°C (79°F), while June's temperatures range from a minimum of 4°C (40°F) to a maximum of 27°C (80°F). The average temperature in September is 12°C (55°F), just below June’s average of 14°C (57°F). Regarding precipitation, September sees a bit more rain, with 128 mm (5.0 in) over 17 days compared to June's 112 mm (4.4 in) over 16 days. Humidity levels are also higher in September at 88%, compared to 83% in June. For a more detailed look at the weather during this time, you can check Windermere weather in June.

When comparing the weather in September to that of July, we can see notable differences in temperature and precipitation. September experiences a cooler range, with minimum temperatures dipping to 2°C (36°F) and a maximum of 26°C (79°F), while July has a warmer minimum of 6°C (42°F) and maximum of 29°C (84°F). Additionally, September sees higher precipitation levels at 128 mm (5.0 in) over 17 days, compared to July’s 108 mm (4.2 in) over 16 days. Humidity is slightly higher in September at 88%, compared to 82% in July, contributing to a more humid atmosphere as the summer months transition into autumn. For more detailed information, you can check Windermere weather in July.

In comparing the weather of September and August, we notice a gradual shift towards cooler conditions as summer transitions into autumn. September features a minimum temperature of 2°C, an average of 12°C, and a maximum of 26°C, whereas August's temperatures are warmer, with a minimum of 6°C, an average of 15°C, and a maximum of 27°C. Precipitation is slightly less in September, totaling 128 mm over 17 days, compared to August's 151 mm over 20 days. Moreover, humidity levels in September are higher at 88%, compared to 82% in August, suggesting a more humid atmosphere as fall approaches. For further details on August weather, you can check Windermere weather in August.

September and October present notable contrasts in weather conditions. In September, temperatures range from a minimum of 2°C (36°F) to a maximum of 26°C (79°F), with an average of 12°C (55°F). The month experiences 128 mm (5.0 in) of precipitation over 17 days and maintains a high humidity level of 88%. In contrast, October sees cooler temperatures, with a minimum of -3°C (26°F), an average of 10°C (50°F), and a maximum of 20°C (68°F). The month is wetter, accumulating 174 mm (6.8 in) of rainfall over 20 days, and humidity slightly increases to 90%. For more detailed insights on October's weather, you can visit Windermere weather in October.

September and November present a noticeable contrast in weather conditions. In September, temperatures typically range from a minimum of 2°C (36°F) to a maximum of 26°C (79°F), with an average of 12°C (55°F). The month experiences significant rainfall, totaling 128 mm (5.0 in) over 17 days, coupled with a humidity level of 88%. In contrast, November brings cooler temperatures, with a minimum of -4°C (25°F) and a maximum of 13°C (56°F), averaging around 7°C (44°F). Although precipitation is slightly lower at 123 mm (4.9 in) and spread over 18 days, the humidity rises to 92%, creating a damp and chilly atmosphere. For a detailed look at November conditions, you can visit Windermere weather in November.

September and December present quite contrasting weather patterns. September enjoys milder temperatures with a minimum of 2°C (36°F) and a pleasant average of 12°C (55°F), peaking at a maximum of 26°C (79°F). In this month, rainfall is relatively lighter, totaling 128 mm (5.0 in) over 17 days, with humidity averaging at 88%. In contrast, December brings colder conditions, with temperatures dipping as low as -6°C (21°F) and averaging just 5°C (41°F), while the maximum temperature reaches only 12°C (53°F). The precipitation slightly increases to 142 mm (5.6 in) over 19 days, accompanied by a similar humidity level of 89%. For more specifics on December's weather, you can check Windermere weather in December.

Compare Windermere's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Windermere

September in Windermere brings a distinct shift from the warm embrace of summer, as temperatures cool, making way for crisp autumn air. With an increase in precipitation and higher humidity, the month often feels wetter, with nearly half the days experiencing rain. This contrast creates a picturesque landscape, rich with the changing colors of fall. While the average temperature hovers around a mild 12°C, the reaching highs of 26°C still remind us of summer's lingering warmth. For a deeper understanding of how Windermere's unique climate shapes its seasons and activities, visit Windermere Climate.