September Weather in Glenariff, United Kingdom

Last updated: March 17, 2025

In September, Glenariff experiences a temperate climate characterized by a maximum temperature of 20°C (69°F) and an average of 13°C (56°F). With minimum temperatures dipping to 4°C (39°F), visitors should be prepared for cool evenings. The month is notably wet, receiving 81 mm (3.2 in) of rain over 17 days, contributing to a high humidity level of 88%. This blend of conditions creates a lush and vibrant landscape, making it a captivating time to explore Glenariff's stunning natural beauty.

September Temperature in Glenariff

In September, Glenariff experiences a gradual transition into autumn, reflected in its mild temperatures that range from a minimum of 4°C (39°F) at night to a comfortable maximum of 20°C (69°F) during the day. The average temperature settles at 13°C (56°F), making it one of the cozier months of the year. This month marks a shift from the summer warmth, as evidenced by the noticeable dip from the previous month's averages. Nonetheless, the pleasant days invite outdoor exploration and appreciation of the stunning landscapes. As foliage begins to change, September offers a unique blend of warmth and the crispness of early fall, creating an enchanting atmosphere in this picturesque United Kingdom locale.

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

The chart illustrates September temperature patterns in Glenariff, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec424244465156585855514744
Data source: Temperature data for Glenariff 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 Glenariff

September in Glenariff shows a notable shift in precipitation patterns, as the month receives 81 mm (3.2 in) of rain over 17 days. This volume represents a significant decrease from the record-setting 128 mm (5.0 in) in August, suggesting a transition into the cooler autumn months. However, September still maintains a steady frequency of rainy days akin to those seen in the summer, indicating that the region remains under the influence of maritime weather systems. This consistent rainfall is part of a broader trend, as the autumn months typically feature increased precipitation, with October following closely behind at 106 mm (4.2 in). Despite September's dip in total rainfall compared to its predecessor, it still plays a crucial role in replenishing the local environment in preparation for the more intense rains to come.

September Precipitation Trends in Glenariff

The chart displays monthly precipitation patterns in Glenariff, 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.
JanFebMarAprMayJunJulAugSepOctNovDec6910182456791991288110610399
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Glenariff

In September, Glenariff, United Kingdom, experiences a notable rise in humidity, peaking at 88%—the highest level since the winter months. This increase reflects a transitional phase as the summer warmth lingers, creating a slightly more muggy atmosphere compared to the previous months. Following a summer where humidity remained consistent at 86%, September sets the stage for autumnal changes, as it begins to pave the way for the even higher humidity levels seen in the coming months. With October and November forecasted to hover around 89% and 90% respectively, it's clear that as the seasons shift, so too does the moisture in the air, making Glenariff a notably humid location as fall approaches.

September Average Humidity in Glenariff

This chart illustrates the average monthly humidity levels in Glenariff, 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.
JanFebMarAprMayJunJulAugSepOctNovDec87%86%86%85%82%84%86%86%88%89%90%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Glenariff

In September, the UV Index in Glenariff, United Kingdom settles at a moderate level of 5, indicating that sun exposure is becoming less intense compared to the peak summer months. This marks a transition from the higher UV levels seen in July and August, where values reached 8 and 6, respectively. With a burn time of approximately 30 minutes, it's essential to stay aware of the sun's strength, especially as the days grow shorter. As autumn sets in, the UV Index remains moderate, aligning closely with the values observed in both March and April, while significantly lower than the sun-soaked summer months. For further details, you can check Glenariff UV Index.

Maximum UV Index Levels in Glenariff for September

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

In September, Glenariff basks in a welcoming glow with 296 hours of sunshine, a delightful continuation of the warmer months. The trend reflects a gradual decline from the sunny peaks of July and August, which boast impressive totals of 418 and 365 hours respectively. As summer gently transitions into autumn, the September days remain bright, surpassing the chilly forecasts of October and the solemnity of the winter months ahead. This month offers visitors an inviting blend of warmth and light, making it an ideal time to explore the breathtaking landscapes before the autumn chill sets in, showcasing nature's beauty against a fading summer backdrop.

Monthly Sunshine Duration in Glenariff: September Highlighted

The September sunshine duration represents the total number of hours Glenariff 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.
JanFebMarAprMayJunJulAugSepOctNovDec76h151h218h331h412h405h418h365h296h228h119h85h
Data source: Glenariff September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Glenariff During September

In Glenariff, United Kingdom, September brings a modest 20% chance of sunny weather. This marks a slight decline in sunshine compared to the peak of April, which boasts a 45% likelihood, and falls short of the more promising months in summer. As the year progresses, the probability of clear skies consistently dips, with only a minimal 18% chance noted in both August and the subsequent months. While September may not be the sunniest, it offers a gentle transition towards the cooler autumn days, inviting visitors to enjoy the region's lush landscapes under even the slightest break in the clouds.

Percentage of Sunny Days in September in Glenariff

The chart illustrates the percentage of sunny days in Glenariff 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 Glenariff experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec26%27%18%45%32%24%28%18%20%18%19%14%
Data source: Glenariff September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Glenariff in September

As summer transitions into autumn, September in Glenariff, United Kingdom, offers a delightful balance of daylight, with approximately 12 hours of sunlight. Following the long, radiant days of June and July, which bask in a maximum of 17 hours, the daylight begins to gradually recede. This month marks the start of a notable shift as the days shorten, stepping down to 10 hours by October. The gradual decline is a gentle reminder of the changing seasons, making September a perfect time for outdoor enthusiasts to soak up the remaining warmth before the cooler months set in. Each passing day hints at the cozy embrace of autumn, as daylight wanes and evenings grow longer.

Average Daylight Hours in Glenariff for September

The chart illustrates the variation in daylight duration in Glenariff throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec7h 51m9h 41m11h 53m14h 9m16h 10m17h 15m16h 40m14h 50m12h 39m10h 24m8h 22m7h 15m
Data source: Glenariff daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Glenariff

In September in Glenariff, the winds begin to stir gently after the summer's calm, with an average wind speed of 3.9 m/s (9 mph). This marks a slight increase from the quieter months of July and August, where the breezes hovered around 3.1 m/s and 3.5 m/s respectively. As autumn approaches, the wind picks up slightly, hinting at the seasonal change ahead. Compared to the earlier months of the year, where stronger winds are more prominent in February (7.2 m/s) and November (6.1 m/s), September’s breezes offer a serene transition, making it a perfect time to appreciate the scenic beauty of Glenariff as the landscape begins to shift with the changing seasons.

Average September Wind Speed in Glenariff

The chart displays monthly wind speed patterns in Glenariff, 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.
JanFebMarAprMayJunJulAugSepOctNovDec5.17.25.44.14.74.33.13.53.9 m/s5.46.15.7
Data source: Glenariff September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Glenariff Compares to Other Months

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

In September, temperatures range from a chilly 4°C (39°F) to a pleasant 20°C (69°F), with an average of 13°C (56°F). The month sees significant precipitation, totaling 81 mm (3.2 in) over 17 days, while humidity remains high at 88%. In contrast, January experiences colder temperatures, reaching a minimum of -2°C (28°F) and an average of 6°C (43°F), with a maximum of 13°C (56°F). Although January has slightly less precipitation at 69 mm (2.7 in) over 13 days, the humidity is still quite high at 87%. For more detailed weather information, you can visit Glenariff weather in January.

September and February present contrasting weather conditions in Glenariff. September typically enjoys milder temperatures, with averages around 13°C (56°F), while February experiences colder conditions, averaging only 6°C (43°F). Precipitation is also notable in both months, with September receiving 81 mm (3.2 in) over 17 days, compared to February's slightly higher 101 mm (4.0 in) across 16 days. The humidity levels remain relatively similar, hovering at 88% in September and 86% in February. For more details on February's conditions, you can check Glenariff weather in February.

In comparing the weather between September and March, we observe notable differences in temperature and overall feel. September typically experiences milder conditions, with average temperatures ranging from a minimum of 4°C (39°F) to a maximum of 20°C (69°F), while March is chillier, starting at a minimum of -3°C (27°F) and peaking at 15°C (59°F). Precipitation levels are similar in both months, with September receiving 81 mm (3.2 in) and March slightly higher at 82 mm (3.2 in), both spread over approximately 17 days. Humidity levels in September are a bit higher at 88%, compared to March's 86%, indicating a slight decrease in moisture content as the seasons change. For more specific weather details, you can refer to Glenariff weather in March.

When comparing the weather in September and April, one can observe noticeable differences in both temperature and precipitation. September enjoys milder temperatures with a minimum of 4°C (39°F) and an average of 13°C (56°F), peaking at 20°C (69°F). In contrast, April starts off a bit chillier, with temperatures ranging from a minimum of 0°C (32°F) to an average of 8°C (47°F) and a maximum of 18°C (64°F).

Precipitation levels also vary, with September experiencing 81 mm (3.2 in) over 17 days, whereas April sees a lighter rainfall of 44 mm (1.8 in) across 11 days. The humidity remains relatively high in both months, with September at 88% and April slightly lower at 85%. For a more detailed look at April’s weather, you can visit Glenariff weather in April.

When comparing the weather in September and May, we see some notable differences. September enjoys slightly warmer temperatures, with averages reaching 13°C (56°F) and a maximum of 20°C (69°F), while May's average is cooler at 11°C (51°F), despite both months sharing the same maximum temperature of 20°C (69°F). In terms of precipitation, September experiences more rainfall, totaling 81 mm (3.2 in) over 17 days, compared to May, which has 67 mm (2.6 in) across 13 days. Additionally, September's humidity is a bit higher at 88%, compared to May's 82%. For more specific details about Glenariff's weather during this time, you can check out Glenariff weather in May.

In comparing the weather of September and June, we find that September experiences a mild range of temperatures, with a minimum of 4°C (39°F) and a maximum of 20°C (69°F), averaging around 13°C (56°F). This month also sees a higher humidity level at 88% and receives about 81 mm (3.2 in) of precipitation over 17 days. In contrast, June is slightly warmer, with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 23°C (74°F), while maintaining the same average temperature of 13°C (56°F) as September. June has slightly more rainfall, totaling 91 mm (3.6 in) over 16 days, but a lower humidity level at 84%. For more detailed information on June weather in this region, check out Glenariff weather in June.

In comparing the weather between September and July, July tends to be warmer and slightly drier. The average temperature in July reaches 15°C (59°F), with a maximum of 24°C (76°F), while September sees a cooler average of 13°C (56°F) and a maximum of only 20°C (69°F). Precipitation is also more prevalent in September, with 81 mm (3.2 in) falling over 17 days compared to July's 99 mm (3.9 in) over 15 days. Humidity levels are quite similar, with September at 88% and July slightly lower at 86%. For a closer look at July's weather specifics in Glenariff, you can visit Glenariff weather in July.

In comparing the weather patterns of September and August, September tends to be cooler with average temperatures ranging from a minimum of 4°C (39°F) to a maximum of 20°C (69°F), while August's temperatures are slightly warmer, ranging from a minimum of 8°C (46°F) to a maximum of 21°C (71°F). Precipitation is also noticeably different; September experiences 81 mm (3.2 in) of rain over 17 days, whereas August has a higher total of 128 mm (5.0 in) spread across 19 days. Humidity levels remain fairly consistent, with September at 88% and August at 86%. For more detailed insights on August weather, you can visit Glenariff weather in August.

In September, the weather features a minimum temperature of 4°C (39°F), with an average of 13°C (56°F) and a maximum reaching 20°C (69°F). The month sees a total precipitation of 81 mm (3.2 in) over 17 days, with humidity levels at 88%.

By contrast, October brings slightly cooler temperatures, with a minimum of 2°C (35°F), an average of 11°C (51°F), and a maximum of 18°C (64°F). Precipitation increases to 106 mm (4.2 in) spread across 18 days, and humidity remains comparable at 89%. For more detailed insights, you can check Glenariff weather in October.

When comparing the weather in September and November, it’s clear that November tends to be cooler and wetter. September features a milder average temperature of 13°C (56°F), with maximum highs reaching 20°C (69°F), while November's average drops to 8°C (47°F) and peaks at 14°C (58°F). Additionally, November sees increased precipitation, with 103 mm (4.0 in) falling over 18 days, compared to September's 81 mm (3.2 in) spread over 17 days. Both months experience high humidity, but November is slightly more humid at 90% compared to September's 88%. For more details on the specific conditions in November, check out this link: Glenariff weather in November.

In comparing September and December weather, we see a notable drop in temperature as autumn transitions into winter. September typically enjoys a milder climate with average highs around 20°C (69°F) and lows of 4°C (39°F), while December's temperatures are cooler, averaging around 6°C (44°F), with minimums dipping to -1°C (31°F). Both months experience similar levels of precipitation, with September receiving about 81 mm over 17 days and December slightly higher at 99 mm, also over 17 days. Humidity remains relatively high in both months, at 88% for September and 86% for December. For more detailed weather insights, check out Glenariff weather in December.

Compare Glenariff's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Glenariff

As September unfolds in Glenariff, the transition into autumn becomes evident with a notable drop in temperatures and an increase in wet weather compared to the summer months. While the average temperature settles at a mild 13°C, the humidity remains high at 88%, contributing to a brisk feel in the air. This month also sees a significant rise in precipitation, with frequent rain showers making outdoor plans a bit tricky. Despite the dampness, the stunning fall foliage starts to emerge, providing a beautiful backdrop to the rainy days. For a deeper understanding of Glenariff’s climate patterns throughout the year, check out Glenariff Climate.