September Weather in Pontypridd, United Kingdom

Last updated: March 17, 2025

September in Pontypridd brings a blend of mild days and cool nights, with maximum temperatures reaching a pleasant 27°C (81°F) and an average of 15°C (59°F). Visitors can expect a few wet days, as the region experiences 81 mm (3.2 in) of rainfall over approximately 12 days throughout the month. With humidity levels hovering around 79%, the air can feel quite damp, particularly in the early mornings and evenings. This combination of temperatures and precipitation makes September a transitional month, where the early autumn charm of Pontypridd is both refreshing and invigorating.

September Temperature in Pontypridd

As September arrives in Pontypridd, the temperatures begin to shift, heralding the transition from summer warmth to autumn's embrace. With night-time lows around 4°C (40°F) and comfortable daytime averages reaching 15°C (59°F), the weather is pleasantly mild. As the days progress, temperatures can peak at a balmy 27°C (81°F), often reminiscent of late summer, allowing for outdoor activities under crisp blue skies. This month marks a notable trend, where the warmth of August lingers, yet gradually, the cooling pattern sets the stage for autumn, preparing the landscapes for a vibrant change in foliage soon to come.

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

The chart illustrates September temperature patterns in Pontypridd, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec424345485460636258534745
Data source: Temperature data for Pontypridd 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 Pontypridd

In September, Pontypridd experiences a moderate level of precipitation, with 81 mm (or 3.2 in) of rain falling over 12 days. This amount follows a slightly wetter August, which recorded 97 mm and signals the transition into the typically rainier autumn months. Notably, September's rainfall is comparable to the earlier summer months, indicating a consistent pattern of precipitation as the region prepares for the October peak of 135 mm. As temperatures gradually begin to drop, residents can expect the first hints of autumnal weather, making this month a bridge between the lush greens of summer and the more turbulent weather to come.

September Precipitation Trends in Pontypridd

The chart displays monthly precipitation patterns in Pontypridd, 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.
JanFebMarAprMayJunJulAugSepOctNovDec751019857798485978113599130
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Pontypridd

In September, humidity in Pontypridd begins to shift as summer draws to a close, settling at around 79%. This marks a slight increase from July and August, where humidity was notably lower at 70% and 73% respectively. The transition into autumn is evident, as the air retains a bit more moisture, hinting at the wetter months ahead. As the chill of October approaches, we can expect humidity levels to rise again, with notable spikes seen throughout the autumn and winter months, often reaching 89% by October and remaining high into the end of the year. This gradual trend underscores Pontypridd's damp climate, where moisture becomes a defining characteristic as the seasons change.

September Average Humidity in Pontypridd

This chart illustrates the average monthly humidity levels in Pontypridd, 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.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%86%84%80%80%70%73%79%89%90%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Pontypridd

In September, Pontypridd experiences a high UV Index of 6, reflecting a continuation of the summer's sun intensity, though with a slight decline compared to the peak months of June and July. With a burn time of just 25 minutes, it’s crucial for residents and visitors alike to remain vigilant about sun protection. This month signals a transition, balancing warm late summer days with the upcoming fall, making it the perfect time to enjoy outdoor activities while still being mindful of UV exposure. For more detailed information on UV levels throughout the year, visit Pontypridd UV Index.

Maximum UV Index Levels in Pontypridd for September

The chart shows the monthly maximum UV Index (UVI) for Pontypridd 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.
JanFebMarAprMayJunJulAugSepOctNovDec124678876421
Data source: Pontypridd 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 Pontypridd

September in Pontypridd offers a gentle transition from the vibrant summer months into the cooler embrace of autumn. With 279 hours of sunshine, it showcases a decline from the sun-drenched days of July and August, yet remains a bright spot in the calendar year—significantly outshining the winter months of November and December, which see less than half of September's sunny hours. The gradual drop reflects a natural rhythm, as the summer’s peak hours begin to yield to the onset of cloudier skies. Despite this shift, September still glows with warmth, inviting locals and visitors alike to enjoy the lingering daylight before the shorter days of fall take hold.

Monthly Sunshine Duration in Pontypridd: September Highlighted

The September sunshine duration represents the total number of hours Pontypridd 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.
JanFebMarAprMayJunJulAugSepOctNovDec81h134h192h303h379h355h399h345h279h224h121h100h
Data source: Pontypridd September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Pontypridd During September

In September, Pontypridd experiences a 28% chance of sunny weather, marking a slight drop from the summer peak in July, which boasts a 41% likelihood. As the seasons transition, this month's sunshine probability reflects a trend of fluctuating brightness, with April standing out as the sunniest month at 52%. Despite the diminishing chances compared to earlier summer months, September holds onto a respectable amount of sun, nestled between the late summer warmth and the encroaching autumn gloom. Overall, while sunny days may become less frequent as the month progresses, the charm of early autumn in Pontypridd is still illuminated by those coveted sunny spells.

Percentage of Sunny Days in September in Pontypridd

The chart illustrates the percentage of sunny days in Pontypridd 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 Pontypridd experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec21%23%29%52%33%27%41%30%28%21%31%20%
Data source: Pontypridd September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Pontypridd in September

As September unfolds in Pontypridd, daylight begins its gentle descent, offering about 12 hours of sunlight—down from the summer highs of 16 hours in June and July. This transition mirrors the gradual shift in seasons, as the lush greenery of late summer slowly yields to the crispness of autumn. Following August’s fading glow of 14 hours, September serves as a gentle reminder that the longer days are behind us, while still providing ample light for those enjoying the early fall. As the days shorten further into October’s 10 hours, the landscape transforms, setting the stage for cozy evenings and the approach of winter.

Average Daylight Hours in Pontypridd for September

The chart illustrates the variation in daylight duration in Pontypridd 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: Pontypridd daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Pontypridd

As September unfolds in Pontypridd, the average wind speed settles at a gentle 3.7 m/s (8 mph), mirroring the calmness felt in the late summer air. This slight decrease continues the trend seen over the warmer months, where wind speeds hovered between 3.4 to 4.7 m/s, showcasing a serene transition into autumn. The tranquil breezes of September not only evoke a sense of relaxation but also set the stage for the incoming seasonal changes, as gusts begin to pick up again in October at 4.8 m/s (11 mph). This rhythmic ebb and flow of the wind speeds highlight the unique climate of the region, where each month brings its own character, inviting residents and visitors alike to enjoy the mild and sometimes whimsical weather.

Average September Wind Speed in Pontypridd

The chart displays monthly wind speed patterns in Pontypridd, 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.
JanFebMarAprMayJunJulAugSepOctNovDec5.15.74.83.74.73.53.44.23.7 m/s4.84.25.3
Data source: Pontypridd September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Pontypridd Compares to Other Months

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

In September, the weather warms up, with average temperatures ranging from a cool 4°C (40°F) at night to a pleasant 27°C (81°F) during the day, making it a transition month towards autumn. With about 81 mm (3.2 in) of precipitation spread over 12 days, humidity sits at 79%, lending a crisp feel to the air.

In contrast, January brings much colder temperatures, with lows dropping to -3°C (27°F) and daytime highs peaking at just 13°C (56°F). The month sees slightly less precipitation at 75 mm (3.0 in) but retains a similar frequency of rainy days. The humidity increases to 88%, resulting in a damp and chillier atmosphere. For a detailed look at weather specifics, you can check Pontypridd weather in January.

September and February exhibit distinctly different weather conditions. In September, temperatures range from a mild 4°C (40°F) at night to a comfortable average of 15°C (59°F) during the day, peaking at 27°C (81°F). This month experiences about 81 mm (3.2 in) of precipitation over 12 days, with humidity levels at 79%. In contrast, February is much colder, with minimum temperatures dropping to -4°C (26°F) and an average of 6°C (44°F), only reaching a maximum of 15°C (60°F). This month is wetter overall, with precipitation amounting to 101 mm (4.0 in) across 14 days, and a higher humidity at 88%. For more detailed insights into February weather conditions, you can refer to Pontypridd weather in February.

When comparing the weather in September and March, notable differences emerge in temperature and precipitation patterns. September offers milder conditions with average temperatures ranging from a minimum of 4°C (40°F) to a maximum of 27°C (81°F), while March presents a chillier atmosphere, with temperatures spanning from a minimum of -5°C (22°F) to a maximum of 18°C (65°F). While September sees 81 mm (3.2 in) of precipitation over about 12 days, March experiences slightly higher rainfall at 97 mm (3.8 in) spread over 15 days. Additionally, humidity levels are generally higher in March at 86%, compared to 79% in September. For more detailed information on the weather during this period, check out Pontypridd weather in March.

When comparing September and April weather, notable differences emerge in both temperature and precipitation patterns. September boasts a warmer climate, with average temperatures ranging from a chilly 4°C (40°F) at night to a comfortable 27°C (81°F) during the day, while April's temperatures are typically lower, from a frosty -1°C (30°F) at night to a milder 20°C (69°F) peak. Additionally, September experiences more precipitation, with 81 mm (3.2 in) over approximately 12 days, compared to April's 57 mm (2.2 in) across 10 days. Humidity levels are slightly higher in April at 84%, compared to September's 79%. For a detailed look at the conditions specifically in Pontypridd during April, check out this link: Pontypridd weather in April.

September and May present distinct weather characteristics despite their proximity in the calendar year. In September, temperatures range from a minimum of 4°C (40°F) to a maximum of 27°C (81°F), with an average of 15°C (59°F), making it generally warmer than May, which sees temperatures ranging from 2°C (35°F) to a maximum of 24°C (76°F) and an average of 12°C (54°F). Precipitation levels in both months are similar, with September recording 81 mm (3.2 in) and May slightly less at 79 mm (3.1 in), each experiencing rain on about 12 days. Humidity levels are almost identical too, at 79% in September and 80% in May, contributing to a generally damp atmosphere in both months. For more detailed information about May weather, you can visit Pontypridd weather in May.

In comparing the weather in September and June, we see that both months feature similar average temperatures around 15°C (59°F), but there's a slight difference in the extremes, with September offering a minimum of 4°C (40°F) and a maximum of 27°C (81°F), while June has a minimum of 7°C (45°F) and a very similar maximum of 27°C (82°F). Precipitation levels are comparable as well, with September receiving 81 mm (3.2 in) over 12 days, slightly less than June's 84 mm (3.3 in) during the same number of days. Additionally, humidity remains high in both months, at 79% for September and 80% for June. To explore further details about June's weather, you can check out Pontypridd weather in June.

In comparing the weather of September and July, we see notable differences in temperature and humidity. September experiences a broader range of temperatures, with a minimum of 4°C (40°F) and a maximum of 27°C (81°F), resulting in a pleasant average of 15°C (59°F). In contrast, July is warmer, with minimum temperatures of 9°C (48°F) and a maximum reaching 28°C (82°F), giving it an average of 17°C (63°F). Both months see similar precipitation levels, with 81 mm (3.2 in) in September and 85 mm (3.3 in) in July, and both experience rain on about 12 days. However, September is slightly more humid, averaging 79% compared to July's 70%. For a detailed look at July's weather, you can refer to Pontypridd weather in July.

In comparing the weather of September to August, we observe notable differences. September typically sees cooler temperatures, with a minimum of 4°C (40°F) compared to August's 9°C (48°F). The average temperature in September hovers around 15°C (59°F), while August experiences a slightly warmer average of 17°C (62°F). Additionally, September's maximum temperature reaches 27°C (81°F), slightly lower than August’s peak of 29°C (84°F). Rainfall is also more prevalent in August, with 97 mm (3.8 in) over 13 days, compared to September's 81 mm (3.2 in) across 12 days. Interestingly, September has a higher humidity level of 79%, whereas August maintains a more comfortable 73%. For more details on August's weather, check out Pontypridd weather in August.

September weather tends to be warmer and more variable, with temperatures ranging from a minimum of 4°C (40°F) to a maximum of 27°C (81°F) and an average of 15°C (59°F). The month experiences relatively lower precipitation levels, totaling 81 mm (3.2 in) over 12 days, while humidity sits at 79%. In contrast, October brings a noticeable drop in temperatures, with a minimum of 1°C (33°F) and a maximum of 21°C (70°F), averaging just 12°C (54°F). This month is also wetter, receiving 135 mm (5.3 in) of rain over 16 days, and humidity increases to 89%. For more detailed information, check out the Pontypridd weather in October.

September and November experience notable differences in weather. September typically enjoys a milder climate, characterized by average temperatures ranging from a minimum of 4°C (40°F) to a maximum of 27°C (81°F), with an average of 15°C (59°F). This month sees a total precipitation of 81 mm (3.2 in) over approximately 12 days, and a relative humidity of 79%. In contrast, November brings cooler temperatures, with minimums dropping to -1°C (30°F) and maximums reaching only 16°C (61°F), averaging at 9°C (48°F). This month also experiences increased rainfall, totaling 99 mm (3.9 in) spread over 15 days and a higher humidity level of 90%. To explore more about the weather specifics in November, check out Pontypridd weather in November.

In September, temperatures in Pontypridd range from a minimum of 4°C (40°F) to a maximum of 27°C (81°F), with an average of 15°C (59°F), making it a more mild and pleasant month. However, the weather is less stable, with 81 mm (3.2 in) of precipitation spread over 12 days, and humidity levels sit at 79%.

In contrast, December brings a notable drop in temperature, with a minimum of -4°C (26°F) and a maximum of 13°C (56°F), averaging only 7°C (45°F). This month is wetter, with 130 mm (5.1 in) of precipitation occurring on 17 days, and humidity rises to 89%. For more detailed information, you can check Pontypridd weather in December.

Compare Pontypridd's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Pontypridd

As September unfolds in Pontypridd, the weather begins to transition from the warmth of summer to the coolness of autumn. With days reaching a pleasant 27°C (81°F), the month still offers some warmth, but the average temperature settles at a mild 15°C (59°F), making it noticeably cooler than the peak summer months. Rainfall increases, with a total of 81 mm (3.2 in) spread over 12 days, contributing to a higher humidity level of 79%. This shift in climate marks September as a time of change, where the vibrant hues of nature start to emerge, beckoning residents and visitors alike to embrace the beauty of the season. For more detailed insights into the climatic patterns in Pontypridd, visit Pontypridd Climate.