September Weather in Douglas, United Kingdom

Last updated: March 17, 2025

In September, Douglas, United Kingdom experiences a diverse range of weather conditions, marked by a maximum temperature reaching 25°C (77°F), while the average temperature settles at a cool 11°C (53°F). The month is characterized by occasional chilly spells, with minimum temperatures dropping to -1°C (31°F). Rainfall is quite prominent, with 103 mm (4.1 in) of precipitation spread across 17 days, contributing to a humid atmosphere with an average humidity level of 88%. This blend of warmer days and rainy periods creates a captivating yet unpredictable climate for residents and visitors alike.

September Temperature in Douglas

In September, Douglas, United Kingdom, presents a gentle transition from summer to autumn, with temperatures gradually cooling but still retaining a touch of warmth. With a minimum of -1°C (31°F) and a comfortable average of 11°C (53°F), daytime highs can reach up to 25°C (77°F), making it one of the last months to enjoy pleasant outdoor activities. This month marks a noticeable shift from the peak summer warmth of August, as daytime temperatures begin to decline, reflecting the onset of fall while still offering a few lingering warm days. As the month progresses, the crispness in the air hints at the winter chill to come, inviting residents and visitors alike to make the most of the fleeting warmth before the colder months arrive.

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

The chart illustrates September temperature patterns in Douglas, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec373840444955575652474239
Data source: Temperature data for Douglas generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Douglas

In September, Douglas, United Kingdom, experiences a notable transition in its precipitation patterns, with 103 mm (4.1 in) of rainfall spread over 17 days. This marks a slight decrease from August's 138 mm (5.4 in), yet still contributes to the overall trend of a wet late summer and early autumn. As autumn progresses, the precipitation amount begins to converge with the wetter months ahead, notably October, which sees a significant upswing to 133 mm (5.3 in). This consistent pattern underscores Douglas's reputation for damp weather, emphasizing the importance of preparing for regular rain as the seasons change.

September Precipitation Trends in Douglas

The chart displays monthly precipitation patterns in Douglas, 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.
JanFebMarAprMayJunJulAugSepOctNovDec93143119507211898138103133102117
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Douglas

In September, Douglas, United Kingdom, experiences a noticeable uptick in humidity, reaching 88%, which aligns closely with the higher levels seen at the beginning and end of the year. This increase marks a return to the damp conditions typical of early autumn, reminiscent of the 90% humidity in January and October. Interestingly, after a gradual decline from the moist depths of winter to a relatively drier May at 80%, September's humidity reinforces the trend of a more humid atmosphere as the seasons transition. Following the summer months, where humidity hovered around 82%, September signals that the region is once again embracing its characteristic moist air, priming the environment for the wetter months ahead.

September Average Humidity in Douglas

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

As September rolls into Douglas, the UV Index settles at a moderate level of 5, suggesting that while sun exposure is not excessively dangerous, caution is still advised. With a burn time of 30 minutes, it’s important for residents and visitors alike to protect their skin, especially during the peak hours of sunlight. This month typically marks a gentle transition from the intense summer sun, which peaked at 8 in July and June, offering insights into the changing patterns of UV radiation as we head into the milder autumn months. For further details on UV forecasts throughout the year, check out Douglas UV Index.

Maximum UV Index Levels in Douglas for September

The chart shows the monthly maximum UV Index (UVI) for Douglas 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.
JanFebMarAprMayJunJulAugSepOctNovDec123568865311
Data source: Douglas 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 Douglas

As summer gives way to autumn, September in Douglas, United Kingdom, offers a delightful blend of warmth and light, with an impressive 258 hours of sunshine. This marks a gentle decline from the bustling summer months of July and August, which basked in 362 and 320 hours respectively. The sun-kissed days of September serve as a lovely transition, paving the way for cooler mornings and shorter evenings. While the month still enjoys ample daylight, it hints at the approaching shift, as sunlight hours will dwindle further into October and beyond. This captivating shift in sunlight not only enhances the natural beauty of the landscapes but also invites both residents and visitors to appreciate the lingering warmth of late summer before the chill of winter sets in.

Monthly Sunshine Duration in Douglas: September Highlighted

The September sunshine duration represents the total number of hours Douglas 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.
JanFebMarAprMayJunJulAugSepOctNovDec62h118h170h303h368h342h362h320h258h184h100h65h
Data source: Douglas September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Douglas During September

In Douglas, United Kingdom, the likelihood of sunny weather takes a dip as September unfolds, with a mere 17% chance of sunshine. This marks a notable decline from the sunnier months of spring, where April peaks at 45%. Though summer months like July and August offer slightly more sun, September's dreary forecast signals the onset of autumn. As the year progresses, the chances of clear skies continue to dwindle, with October and December both sitting at a low 14%. Thus, while September may still hold onto some lingering warmth, its cloudier disposition reminds us that brighter days are now behind us.

Percentage of Sunny Days in September in Douglas

The chart illustrates the percentage of sunny days in Douglas 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 Douglas experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec22%20%18%45%26%18%30%22%17%14%23%14%
Data source: Douglas September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Douglas in September

As summer fades in Douglas, the month of September ushers in a gentle decline in daylight, offering about 12 hours of sunlight. This transitional period reflects the gradual shift from the long, bright days of summer—where June peaks at an impressive 17 hours—to the shorter, cozier days of autumn and winter, culminating in January's mere 7 hours of daylight. The steady decrease from 16 hours in July down to September's moderate brightness not only marks the seasonal change but also invites locals to relish the crisp air and the stunning hues of autumn as they savor these final late-summer days.

Average Daylight Hours in Douglas for September

The chart illustrates the variation in daylight duration in Douglas throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec7h 45m9h 37m11h 53m14h 12m16h 16m17h 23m16h 47m14h 54m12h 40m10h 22m8h 16m7h 7m
Data source: Douglas daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Douglas

As September rolls into Douglas, United Kingdom, the winds begin to shift, maintaining an average speed of 3.4 m/s (8 mph), which aligns closely with the mild breezes of summer. This marks a subtle uptick from the typically calmer 2.3 m/s (5 mph) observed in July but remains consistent with the gentle airflow of August. Interestingly, September’s winds prepare the way for the more robust gusts of autumn, which average around 4.8 m/s (11 mph) in October. Overall, this transitional month showcases a balance between lingering summer warmth and the approaching chill, inviting residents and visitors alike to enjoy the beauty of early fall in a refreshingly breezy setting.

Average September Wind Speed in Douglas

The chart displays monthly wind speed patterns in Douglas, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.65.74.53.13.43.62.33.03.4 m/s4.84.63.9
Data source: Douglas September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Douglas Compares to Other Months

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

In September, the weather is generally milder, with temperatures ranging from a minimum of -1°C (31°F) to a comfortable maximum of 25°C (77°F) and an average of 11°C (53°F). The month sees about 103 mm (4.1 in) of precipitation over 17 days, accompanied by high humidity of 88%. In contrast, January experiences much colder temperatures, with a minimum of -15°C (6°F), an average of 3°C (38°F), and a maximum of 12°C (53°F). Precipitation is slightly lower at 93 mm (3.7 in) over 13 days, but the humidity remains high at 90%. For more detailed information about January weather, check Douglas weather in January.

September and February exhibit distinct climatic characteristics. In September, temperatures range from a chilly -1°C (31°F) at night to a pleasant 25°C (77°F) during the day, with an average of 11°C (53°F). The month sees moderate precipitation, totaling 103 mm (4.1 in) over 17 days, while humidity remains consistently high at 88%. In contrast, February is cooler, with temperatures dipping as low as -8°C (17°F) and peaking at 14°C (57°F), averaging around 3°C (38°F). This month experiences more rainfall, accumulating 143 mm (5.6 in) over the same number of days, but maintains the same humidity level of 88%. For a deeper dive into February weather specifics in Douglas, you can visit Douglas weather in February.

In comparing the weather between September and March, it is clear that September tends to be milder, with average temperatures around 11°C (53°F) and a maximum of 25°C (77°F). In contrast, March sees cooler temperatures, with an average of 5°C (40°F) and highs reaching only 16°C (61°F). Precipitation levels are slightly higher in March at 119 mm (4.7 in) compared to 103 mm (4.1 in) in September, although both months experience rain on approximately 17 days. Humidity is also quite similar, with September at 88% and March at 86%. For more detailed information about March weather, visit Douglas weather in March.

In comparing September and April, we find notable differences in weather patterns. September boasts a milder average temperature of 11°C (53°F) with maximum highs reaching 25°C (77°F), while April's average is cooler at 6°C (44°F) and peaks at 20°C (68°F). Precipitation in September is also higher, totaling 103 mm (4.1 in) over 17 days compared to April’s 50 mm (2.0 in) over just 11 days. Humidity levels are slightly elevated in September at 88%, compared to April’s 85%. For a detailed look at April weather conditions, visit Douglas weather in April.

In comparing the weather of September and May, September typically offers a wider temperature range, with average daily highs reaching 25°C (77°F) compared to May's maximum of 24°C (75°F). September experiences slightly higher average temperatures, averaging 11°C (53°F) against May's average of 9°C (49°F). However, May tends to be drier, with only 72 mm (2.8 in) of precipitation over 14 days, while September sees more rain at 103 mm (4.1 in) over 17 days. Additionally, September has a higher humidity level of 88% compared to May’s 80%, making the former feel more humid overall. For a detailed look at May weather, you can check Douglas weather in May.

When comparing the weather in September and June, notable differences emerge. September experiences a broader temperature range, with minimums dipping to -1°C (31°F) and maximums reaching 25°C (77°F), whereas June’s temperatures are milder, ranging from a minimum of 3°C (38°F) to a maximum of 27°C (80°F). While both months have the same number of rainy days (17), September receives slightly less precipitation, totaling 103 mm (4.1 in) compared to June’s 118 mm (4.7 in). Additionally, September has a higher humidity level at 88%, while June sits at a comfortable 83%. For more details on June weather, you can check Douglas weather in June.

In July, the weather is generally milder, with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 27°C (80°F) and an average of 14°C (57°F). This month also features relatively low humidity at 82% and slightly less precipitation, with 98 mm (3.9 in) over 16 days. In contrast, September experiences cooler temperatures, with a minimum of -1°C (31°F) and an average of 11°C (53°F) that peaks at 25°C (77°F). The humidity rises to 88%, and precipitation becomes more frequent, totaling 103 mm (4.1 in) across 17 days. For more detailed information, you can visit Douglas weather in July.

September weather is generally cooler than August, with average temperatures dropping from 13°C (56°F) in August to 11°C (53°F) in September. The minimum temperature also sees a notable decrease, falling from 6°C (42°F) in August to -1°C (31°F) in September. Despite both months reaching a maximum of 25°C (77°F), September experiences more days of rainfall, with 103 mm (4.1 in) of precipitation over 17 days compared to August's 138 mm (5.4 in) over 20 days. Interestingly, September also has slightly higher humidity at 88%, compared to August's 82%. For more details on August weather, visit Douglas weather in August.

In September, temperatures generally ranged from a minimum of -1°C (31°F) to a maximum of 25°C (77°F), with an average of 11°C (53°F). The month saw a total precipitation of 103 mm (4.1 in) over 17 days and average humidity at 88%. In contrast, October experiences cooler temperatures with a minimum of -2°C (28°F) and a maximum of 19°C (66°F), averaging around 8°C (48°F). Additionally, October is wetter, with 133 mm (5.3 in) of precipitation spread over 20 days and a slightly higher humidity level of 90%. For more details, you can check Douglas weather in October.

September and November exhibit notable differences in weather conditions. In September, the temperatures range from a minimum of -1°C (31°F) to a maximum of 25°C (77°F), with an average of 11°C (53°F). The month sees about 103 mm (4.1 in) of precipitation over 17 days and experiences a humidity level of 88%. In contrast, November presents cooler temperatures, with a minimum of -5°C (22°F) and a maximum of 13°C (55°F), averaging 6°C (42°F). Precipitation remains similar at 102 mm (4.0 in) over 16 days, but humidity rises slightly to 92%. For further information, you can check Douglas weather in November.

In September, the weather is noticeably milder, with average temperatures around 11°C (53°F) and a maximum of 25°C (77°F), while December brings cooler conditions, with average temperatures dropping to 4°C (39°F) and maximums reaching only 11°C (52°F). Both months experience a similar number of rainy days, with 17 days of precipitation; however, December has slightly more rainfall at 117 mm (4.6 in) compared to September's 103 mm (4.1 in). Humidity levels remain high in both months, with September at 88% and December slightly higher at 89%. For a closer look at December’s weather specifics, you can visit Douglas weather in December.

Compare Douglas's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Douglas

As summer gracefully transitions to autumn, September in Douglas brings a mix of mild temperatures and noticeable humidity, creating a distinct atmosphere compared to the blazing days of summer. With average highs around 25°C, the warmth lingers but gradually cools down, making way for brisk mornings and evenings. The prevalence of rainy days, totaling 17, marks a shift from the drier months of July and August, while the notable humidity levels of 88% add a touch of dampness to the air. This month serves as a bridge to the more erratic weather patterns of fall, inviting a sense of change. For a deeper dive into what to expect throughout the year, visit Douglas Climate.