September Weather in Arnside, United Kingdom

Last updated: March 17, 2025

September in Arnside, United Kingdom, offers a dynamic blend of weather patterns, characterized by a maximum temperature of 26°C (79°F) and a refreshing average of 13°C (55°F). As autumn approaches, temperatures can dip to a minimum of 2°C (36°F), showcasing the region's variability. Visitors can expect frequent rain, with 125 mm (4.9 in) of precipitation spread across 17 days, resulting in a notably humid atmosphere at 88%, perfect for those who enjoy the rich, verdant landscape that follows a good rainfall. Whether you're wandering coastal paths or exploring the charming village, September's weather creates a uniquely vibrant experience in Arnside.

September Temperature in Arnside

In September, Arnside, United Kingdom, begins to feel the gentle embrace of autumn, with temperatures cooling from the summer highs. The month features a minimum temperature of 2°C (36°F), while the average settles at a comfortable 13°C (55°F), allowing for pleasant outdoor activities. As days transition, the maximum temperature can still reach a mild 26°C (79°F), reflecting the fading warmth of summer. This shift in the climate is marked by a gradual decline in temperatures from the peak summer months, highlighting a trend of cooler, yet still enjoyable, conditions for residents and visitors alike. The balance of warmth and briskness makes September a delightful time to explore the stunning landscapes of Arnside.

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

The chart illustrates September temperature patterns in Arnside, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec394042465157605955504441
Data source: Temperature data for Arnside 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 Arnside

In September, Arnside experiences a significant dip in rainfall compared to the peak months of late summer, with 125 mm (4.9 in) of precipitation over 17 days. This marks a transition from the wetter August, which saw 152 mm (6.0 in) and 20 rainy days, hinting at the onset of autumn. While September maintains a robust amount of rain, it is still notably less than the impending October, which typically brings 169 mm (6.7 in) over 19 days. The consistency in rainfall days suggests a gradual easing into the seasonal change, where the lively summer showers give way to the more reserved, yet frequent, autumnal rains. Understanding these patterns emphasizes how September serves as a pivotal bridge between the lush, wet days of summer and the heavier, more persistent rainfall of fall.

September Precipitation Trends in Arnside

The chart displays monthly precipitation patterns in Arnside, 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.
JanFebMarAprMayJunJulAugSepOctNovDec951561355372112112152125170120140
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Arnside

In September, Arnside, United Kingdom, experiences a notable uptick in humidity, averaging around 88%, which evokes the lingering warmth of summer. This slight increase follows the summer months of July and August, where humidity held steady at 82%, suggesting a transitional period as the seasons begin to shift. The trend of rising humidity continues into the autumn months, with October and November averaging 90% and 92% respectively. This gradual rise reflects the cooler temperatures of fall, enhanced by increased moisture in the air. Consequently, while September retains a hint of summer's warmth, it also heralds the approaching wetter conditions of autumn, marking an interesting climatic transition in this coastal region.

September Average Humidity in Arnside

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

As summer fades and autumn approaches, September in Arnside, United Kingdom, sees a UV Index of 5, which falls into the moderate exposure category. This marks a decline from the previous summer months, where the UV Index peaked at 8. With a burn time of just 30 minutes, residents and visitors are encouraged to take protective measures during midday sun, especially since the UV Index has decreased but remains significant. Overall, September provides a gentle transition in sun exposure, highlighting the importance of adjusting sun safety practices as the seasons change. For detailed insights, explore Arnside UV Index.

Maximum UV Index Levels in Arnside for September

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

As the summer days slowly wane, September in Arnside continues to bask in a generous 300 hours of sunshine, making it one of the sunnier months of the year. Following the peak of summer with July and August showcasing their brilliance at 412 and 366 hours respectively, September retains a delightful warmth as it ushers in the early hints of autumn. This transitional month stands out not only for its abundant daylight but also as a precursor to the more overcast and shorter days ahead in October and November, which offer only 233 and 119 hours of sunshine, respectively. The gradual decline in sunlight throughout the autumn highlights the year's rhythm, while September's inviting weather beckons outdoor enthusiasts to relish in the fading warmth before the chill of winter sets in.

Monthly Sunshine Duration in Arnside: September Highlighted

The September sunshine duration represents the total number of hours Arnside 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.
JanFebMarAprMayJunJulAugSepOctNovDec83h146h216h338h409h387h412h366h300h233h119h95h
Data source: Arnside September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Arnside During September

In September, Arnside, United Kingdom, sees a modest chance of sunny weather, with only an 18% likelihood of clear skies. This is notably lower than the sunnier months of April, which enjoys a peak of 49%, and July, with 33%. The trend suggests that as summer fades, the probability of sunshine diminishes significantly, aligning closely with the overcast tendencies of late autumn. While September can still offer occasional bright days, it's clear that locals and visitors might want to keep an umbrella handy as they transition into the cooler months ahead.

Percentage of Sunny Days in September in Arnside

The chart illustrates the percentage of sunny days in Arnside 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 Arnside experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec18%22%20%49%29%22%33%22%18%15%25%13%
Data source: Arnside September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Arnside in September

As summer transitions into autumn, September in Arnside, United Kingdom, offers a delightful balance with approximately 12 hours of daylight. This marks a gentle decline from the sun-soaked days of June, where daylight peaked at a vibrant 17 hours. As the year progresses, daylight gradually diminishes, with October bringing just 10 hours and November trailing further down to 8 hours. The shift in daylight duration reflects the changing seasons, inviting residents and visitors alike to embrace the beauty of early autumn while enjoying the warm hues of fading summer light. The trend underscores a natural ebb and flow, reminding us of the ephemeral nature of time and daylight itself.

Average Daylight Hours in Arnside for September

The chart illustrates the variation in daylight duration in Arnside throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h9h 45m11h 54m14h 5m16h 1m17h 3m16h 30m14h 45m12h 38m10h 28m8h 29m7h 25m
Data source: Arnside daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Arnside

In September, Arnside experiences a gentle breeze with an average wind speed of 3.1 m/s (7 mph), mirroring the conditions of August. This consistency in wind invites a sense of calm as summer transitions to autumn. Notably, as we move from the earlier months where the winds blew more briskly—reaching up to 4.8 m/s (11 mph) in February—the overall trend reveals a gradual decline in wind speed throughout the summer, with the lightest breezes appearing in July. As autumn approaches, wind speeds begin to rise again, hinting at the seasonal shifts ahead. The mildly blowing September winds perfectly capture the serene essence of Arnside, making it an ideal time to enjoy its picturesque landscapes.

Average September Wind Speed in Arnside

The chart displays monthly wind speed patterns in Arnside, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.64.84.22.83.22.92.33.13.1 m/s4.64.13.8
Data source: Arnside September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Arnside Compares to Other Months

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

In September, the weather tends to be more temperate, with average temperatures ranging from a chilly 2°C (36°F) at night to a warm 26°C (79°F) during the day, resulting in a comfortable overall climate. The month experiences significant rainfall, with about 125 mm (4.9 in) collected over 17 days, and humidity levels hovering around 88%. In contrast, January brings a notable drop in temperatures, with nightly lows reaching -5°C (23°F) and daytime highs only peaking at 12°C (54°F). This winter month experiences less precipitation, totaling 95 mm (3.7 in) over 13 days, but maintains a slightly higher humidity level of 90%. For a detailed look at January weather in the region, you can visit Arnside weather in January.

When comparing September and February weather, there are notable differences in temperature and precipitation patterns. September experiences a milder climate, with average temperatures ranging from a minimum of 2°C (36°F) to a maximum of 26°C (79°F). In contrast, February is much cooler, marked by average temperatures between -5°C (22°F) and a high of 17°C (63°F). Both months see significant rainfall, but February has slightly higher precipitation at 156 mm (6.1 in) compared to September's 125 mm (4.9 in), with both month experiencing precipitation on 17 days. Humidity remains consistent at 88% for both months. For more details on February weather, check out Arnside weather in February.

September and March exhibit contrasting weather patterns. September typically sees a wider temperature range, with minimums around 2°C (36°F) and maximums reaching up to 26°C (79°F), averaging at 13°C (55°F). The month experiences about 125 mm (4.9 in) of precipitation over 17 days, coupled with a relatively high humidity of 88%. In contrast, March is cooler, with minimum temperatures dropping to -5°C (22°F) and maximums around 17°C (63°F), averaging 6°C (43°F). Precipitation in March is slightly higher at 135 mm (5.3 in) over the same number of days, but humidity remains a bit lower at 86%. For those interested in detailed weather conditions, check out Arnside weather in March.

Comparing the weather of September and April reveals notable differences in temperature and precipitation. September typically enjoys milder temperatures, with averages around 13°C (55°F) and maximums reaching up to 26°C (79°F), whereas April experiences cooler conditions, with average temperatures of 8°C (46°F) and nights that can drop to -4°C (26°F). Additionally, September is marked by higher precipitation levels, totaling 125 mm (4.9 in) across 17 days, compared to April's 53 mm (2.1 in) over just 9 days. Humidity is relatively high in both months, with September at 88% and April at 85%. For more detailed information, you can check Arnside weather in April.

In September, temperatures range from a chilly 2°C (36°F) to a warm 26°C (79°F), with an average of 13°C (55°F), making it the transition into fall. The month sees significant rainfall, with 125 mm (4.9 in) spread over 17 days, contributing to higher humidity levels at 88%. In contrast, May experiences a cooler temperature range, with minimums dropping to -1°C (31°F) and a milder average of 11°C (52°F). Precipitation is notably less, at 72 mm (2.8 in) over 13 days, and humidity is moderately lower at 80%. For more detailed insights into May weather, you can check Arnside weather in May.

In comparing the weather of September and June, it’s clear that both months exhibit mild temperatures but with some differences. September sees a minimum temperature of 2°C (36°F) and an average of 13°C (55°F), while June has slightly warmer temperatures with a minimum of 4°C (40°F) and an average of 14°C (57°F). June also boasts a maximum temperature of 27°C (81°F), marginally higher than September’s peak of 26°C (79°F). Precipitation levels are similar, with September recording 125 mm (4.9 in) over 17 days, while June has 112 mm (4.4 in) over 16 days. Humidity is slightly higher in September at 88%, compared to June’s 83%. For a more detailed look at June weather, you can check Arnside weather in June.

When comparing the weather in September and July, we can see notable differences in temperature and precipitation. September typically experiences a minimum temperature of 2°C (36°F) and an average of 13°C (55°F), with a maximum of 26°C (79°F), whereas July has a slightly warmer minimum of 5°C (42°F) and an average of 15°C (60°F), reaching up to 30°C (86°F) at its highest. In terms of precipitation, September sees more rain, with 125 mm (4.9 in) over 17 days compared to July’s 112 mm (4.4 in) across 15 days. Humidity levels are also higher in September at 88%, compared to 82% in July. To explore more about the weather dynamics in July, you can visit Arnside weather in July.

In comparing the weather of September and August, September experiences cooler temperatures with a minimum of 2°C (36°F) compared to August's minimum of 6°C (44°F). Average temperatures also dip slightly in September to 13°C (55°F), while August maintains a higher average of 15°C (59°F). However, September can reach a maximum of 26°C (79°F), only slightly lower than August's maximum of 28°C (83°F). Precipitation is slightly less in September with 125 mm (4.9 in) over 17 days, while August sees 152 mm (6.0 in) over 20 days. Humidity remains high in both months, but is marginally higher in September at 88% compared to 82% in August. For detailed weather information, you can check Arnside weather in August.

In September, temperatures are generally milder, with minimums around 2°C (36°F) and maximums reaching up to 26°C (79°F), leading to an average of 13°C (55°F). The month sees a total precipitation of 125 mm (4.9 in) over 17 days, with humidity levels at 88%. In contrast, October experiences cooler conditions, with minimum temperatures dropping to -2°C (28°F) and maximums only reaching 20°C (69°F), averaging 10°C (50°F). This month also sees an increase in precipitation, totaling 169 mm (6.7 in) across 19 days and a slight rise in humidity to 90%. For more detailed insights, you can visit Arnside weather in October.

September and November exhibit contrasting weather patterns as summer transitions into winter. In September, temperatures range from a minimum of 2°C (36°F) to a comfortable maximum of 26°C (79°F), with an average of 13°C (55°F), while humidity levels are relatively lower at 88%. The month also experiences considerable rainfall, with 125 mm (4.9 in) across 17 days. In contrast, November sees a significant drop in temperatures, with lows reaching -7°C (20°F) and an average of 7°C (45°F); the maximum temperature climbs only to 14°C (58°F). Precipitation remains similar at 120 mm (4.7 in), but it falls over 18 days, accompanied by increased humidity levels reaching 92%. For further details on November conditions, you can check out the resource at Arnside weather in November.

September and December present distinctly different weather patterns. In September, temperatures range from a mild 2°C (36°F) at night to a pleasant 26°C (79°F) during the day, with an average of 13°C (55°F). The month experiences about 125 mm (4.9 in) of rainfall over 17 days, and humidity remains high at 88%. In contrast, December brings cooler temperatures, with lows dropping to -7°C (20°F) and highs reaching only 12°C (54°F), averaging around 5°C (41°F). This month sees increased precipitation at 140 mm (5.5 in) over the same number of rainy days, while humidity remains slightly higher at 89%. For more detailed insights on December weather, you can check out Arnside weather in December.

Compare Arnside's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Arnside

As summer fades into autumn, September in Arnside presents a striking transition in weather compared to the warmer months. The days grow noticeably cooler, with an average temperature that invites cozy layers, while the occasional warmth can still peak at a delightful 26°C. However, this month also brings increased rainfall, with about half the days experiencing some precipitation and a humidity level that lingers at 88%. This unique blend of warmth and wetness makes September feel distinctly different, setting the stage for the crispness of fall ahead. For a detailed exploration of the climatic patterns you can expect throughout the year, visit Arnside Climate.