September Weather in Barnstaple, United Kingdom

Last updated: March 17, 2025

September in Barnstaple, United Kingdom, offers a climate that showcases the transition from summer warmth to autumn coolness. With maximum temperatures reaching a pleasant 27°C (81°F) and an average of 14°C (58°F), the month presents a delightful blend of sunny days and crisp evenings. However, it’s also a month of notable precipitation, averaging 75 mm (2.9 in) over 11 days, contributing to a humidity level of 79% that adds a refreshing mist to the air. As the days grow shorter, September in Barnstaple is an intriguing time for locals and visitors alike, blending warmth and the onset of seasonal change.

September Temperature in Barnstaple

In September, Barnstaple showcases a pleasant transition into autumn, with temperatures ranging from a minimum of 4°C (40°F) to a maximum of 27°C (81°F). The average temperature hovers around 14°C (58°F), making it a comfortable time to explore the charming town and its surrounding countryside. As the summer warmth begins to wane, you'll notice a decrease in temperatures compared to the preceding months, yet the climate remains mild enough to enjoy outdoor activities. This month reflects a shift from the peak summer highs of July and August, fostering a cozy atmosphere perfect for enjoying the vibrant fall scenery. Overall, September stands out as a delightful time to visit, where the lingering warmth merges effortlessly into the cool embrace of autumn.

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

The chart illustrates September temperature patterns in Barnstaple, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec434445485359616158534846
Data source: Temperature data for Barnstaple 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 Barnstaple

In September, Barnstaple experiences a moderate precipitation amount of 75 mm (2.9 in), with rainfall occurring over 11 days. As summer gives way to autumn, the rainfall slightly declines from August's totals, yet maintains a consistent level typical for this time of year. This trend reinforces the region's transitional climate, where rain becomes more prevalent as it paves the way for the wetter months ahead. The relatively stable precipitation levels throughout the summer and into early autumn suggest a balanced distribution of moisture, preparing the landscape for the forthcoming increase in rainfall, highlighted by October's average of 107 mm (4.2 in). Overall, September serves as a bridge between the warmer, drier days of summer and the more saturated conditions of fall.

September Precipitation Trends in Barnstaple

The chart displays monthly precipitation patterns in Barnstaple, 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.
JanFebMarAprMayJunJulAugSepOctNovDec70808851688375827510790122
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Barnstaple

In September, Barnstaple experiences a shift in humidity, with levels averaging 79%—a slight increase compared to the drier summer months of July and August, which recorded 70% and 73% respectively. This uptick serves as a precursor to the more humid months that follow in autumn, where October and November see humidity levels rise dramatically to 89% and 90%. As the year progresses, the overall trend highlights a return to higher humidity levels, reminiscent of the 88% and 86% consistent in the winter and early spring months. September thus marks a transitional phase, blending the residual warmth of summer with the encroaching moisture of fall, setting the stage for the wetter months ahead.

September Average Humidity in Barnstaple

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

As September rolls into Barnstaple, the UV Index remains at a high level of 6, mirroring the trends set in the late summer months. This means that while the days are starting to cool, sun exposure can still be significant, with a recommended burn time of just 25 minutes for unprotected skin. Following the peak summer months of July and June, which featured a very high UV Index of 8, September marks a gradual decline in intensity, yet caution is still advised for outdoor activities. As autumn approaches, it’s essential to remain vigilant about UV exposure, especially since the index serves as a reminder that UV radiation can be prevalent even as temperatures dip. For more detailed information on protective measures and sun safety, check out Barnstaple UV Index.

Maximum UV Index Levels in Barnstaple for September

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

As the warmth of summer begins to wane, September in Barnstaple offers a delightful taste of sunshine, boasting around 308 hours of bright sky. This month sees a notable dip from the sun-soaked days of July and August, which each delivered over 400 hours of light, yet it still holds its own against the chill of autumn that follows. The steady decline in daylight from the peak of summer reflects the natural rhythm of the seasons, transitioning gracefully into the cooler months ahead. With vibrant landscapes awash in golden hues, September remains a cherished time for outdoor activities, inviting both locals and visitors to bask in the lingering warmth before the darker days of October set in.

Monthly Sunshine Duration in Barnstaple: September Highlighted

The September sunshine duration represents the total number of hours Barnstaple 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.
JanFebMarAprMayJunJulAugSepOctNovDec94h152h217h339h402h392h417h373h308h244h136h114h
Data source: Barnstaple September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Barnstaple During September

In Barnstaple, the likelihood of sunny weather in September sees a moderate 26% chance, positioning it in the middle range when compared to the year's other months. This figure reflects a noticeable decline from the 54% chance of sunshine typical in April, hinting at the gradual transition into autumn as summer fades. Although September offers more sun than the dreary depths of winter, where chances drop to 18-20%, it trails behind the sunnier months like March and July, which boast 30% and 34% respectively. As the days shorten and temperatures cool, residents can expect a mix of sunny spells and lingering clouds, making September a beautifully unpredictable month for weather enthusiasts.

Percentage of Sunny Days in September in Barnstaple

The chart illustrates the percentage of sunny days in Barnstaple 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 Barnstaple experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec18%23%30%54%32%22%34%29%26%20%24%20%
Data source: Barnstaple September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Barnstaple in September

As summer transitions into autumn, September in Barnstaple, United Kingdom, experiences a gradual decline in daylight, offering about 12 hours of sunlight each day. This shift marks a notable decrease from the height of summer in June, where daylight extended to a robust 16 hours. The month reflects a harmonious balance, bridging the lengthy, sun-filled days of summer with the shorter, cozy hours of October’s 10 hours. September’s daylight serves as a gentle reminder of the changing seasons, inviting residents to enjoy the lingering warmth and daylight before the evenings grow longer and darker.

Average Daylight Hours in Barnstaple for September

The chart illustrates the variation in daylight duration in Barnstaple throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 27m10h11h 55m13h 52m15h 34m16h 28m15h 59m14h 27m12h 34m10h 37m8h 53m7h 57m
Data source: Barnstaple daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Barnstaple

As summer transitions into autumn, September in Barnstaple ushers in a gentle breeze with an average wind speed of 3.7 m/s (8 mph), marking a slight drop from the summer's more consistent winds. After the peak winds of February at 6.2 m/s (14 mph), the wind speeds have generally fluctuated, with a noticeable decline over the warmer months. September's mild winds, reminiscent of late summer calmness, provide a perfect backdrop to enjoy the scenic beauty and vibrant fall colors that begin to emerge. With temperatures cooling and November's wind picking up to 4.5 m/s (10 mph), the landscape of Barnstaple begins to shift, inviting residents and visitors alike to embrace the seasonal change.

Average September Wind Speed in Barnstaple

The chart displays monthly wind speed patterns in Barnstaple, 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.
JanFebMarAprMayJunJulAugSepOctNovDec5.36.25.14.05.03.53.64.33.7 m/s5.14.55.9
Data source: Barnstaple September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Barnstaple Compares to Other Months

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

In comparing the weather of September and January, we can note significant differences in both temperature and humidity levels. September enjoys a more moderate climate with average temperatures ranging from a minimum of 4°C (40°F) to a maximum of 27°C (81°F), while January's temperatures are much colder, averaging between -3°C (27°F) and 14°C (58°F). Additionally, September experiences lower humidity at 79%, compared to January's 88%, contributing to a crisper feel during the winter month. Precipitation is fairly similar, with September receiving 75 mm (2.9 in) over 11 days, and January slightly lower at 70 mm (2.7 in) across 12 days. For more specific insights on January weather, you can visit Barnstaple weather in January.

In September, the weather tends to be warmer and more pleasant, with average temperatures around 14°C (58°F) and maximums reaching up to 27°C (81°F). In contrast, February is much colder, with average temperatures of 7°C (44°F) and highs capped at 16°C (62°F). Both months experience notable precipitation, with September receiving approximately 75 mm (2.9 in) over 11 days, while February sees slightly more rainfall at 80 mm (3.2 in) across 14 days. Additionally, February boasts a higher humidity level at 88% compared to September's 79%. For a more detailed analysis of February weather, check out Barnstaple weather in February.

September and March exhibit distinct differences in weather patterns. In September, temperatures range from a mild minimum of 4°C (40°F) to a maximum of 27°C (81°F), with an average of 14°C (58°F). This month also sees about 75 mm (2.9 in) of precipitation across approximately 11 days and a humidity level of 79%. In contrast, March experiences cooler temperatures, with a minimum of -5°C (23°F) and a maximum of 20°C (68°F), averaging at 7°C (45°F). It tends to be wetter as well, with 88 mm (3.5 in) of precipitation over 16 days and higher humidity at 86%. For more detailed weather insights for March, you can check Barnstaple weather in March.

When comparing the weather in September and April, we see notable differences in temperature and precipitation. September boasts a warmer range with minimum temperatures of 4°C (40°F) and maximums reaching up to 27°C (81°F), accompanied by an average of 14°C (58°F). In contrast, April starts off cooler, with minimum temperatures dipping to -1°C (31°F) and averages around 9°C (49°F), peaking at 22°C (72°F). Precipitation levels also vary, with September receiving 75 mm (2.9 in) over 11 days, whereas April has a lighter 51 mm (2.0 in) over 8 days. Additionally, April has slightly higher humidity at 84% compared to September's 79%. For a closer look at Barnstaple's climate, you can visit Barnstaple weather in April.

When comparing the weather in September and May, September tends to be warmer overall, with average temperatures reaching 14°C (58°F) and maximum highs of 27°C (81°F), while May has an average temperature of 11°C (53°F) and peaks at 24°C (76°F). September also experiences slightly more precipitation, with 75 mm (2.9 in) over 11 days, compared to May's 68 mm (2.7 in) spread over 13 days. Humidity levels are quite similar, hovering around 79% in September and 80% in May, creating a generally moist atmosphere in both months. For a closer look at the specifics of May weather, you can visit Barnstaple weather in May.

When comparing the weather in September and June, we notice both similarities and differences. September experiences a slightly broader temperature range, with a minimum of 4°C (40°F) and a maximum of 27°C (81°F), while June has a minimum of 6°C (43°F) and slightly higher maximum temperatures reaching 28°C (82°F). Precipitation is also notable in both months, with September receiving about 75 mm (2.9 in) over 11 days and June slightly wetter at 83 mm (3.3 in) over 13 days. The humidity levels are similar, hovering around 79% in September and 80% in June. For those interested in a detailed look at the climate specifics, you can refer to Barnstaple weather in June.

The weather in September is notably cooler than in July, with average temperatures ranging from a minimum of 4°C (40°F) to a maximum of 27°C (81°F), compared to July's minimum of 8°C (47°F) and maximum of 28°C (82°F). While both months receive similar amounts of precipitation—75 mm (2.9 in) in September and 75 mm (3.0 in) in July—the number of rainy days is slightly higher in September with 11 days of rainfall compared to July’s 12 days. Additionally, September's humidity is elevated at 79%, making it feel more humid than July, which maintains a lower humidity level of 70%. For further details on July weather specifics, check out Barnstaple weather in July.

In comparing the weather between September and August, we see a notable shift in temperatures and precipitation. September features cooler nighttime temperatures with a minimum of 4°C (40°F) compared to August’s milder minimum of 9°C (48°F). The average temperature in September is slightly lower at 14°C (58°F), while both months share a maximum temperature of 27°C (81°F). Precipitation in September is close to that of August, totaling 75 mm (2.9 in) over 11 days, while August sees slightly higher precipitation at 82 mm (3.2 in) over 16 days. Humidity levels are also a bit higher in September at 79%, compared to 73% in August. For a more detailed look at August weather, check out Barnstaple weather in August.

September typically offers warmer temperatures with an average of 14°C (58°F) and maximum highs reaching 27°C (81°F). In contrast, October sees a noticeable drop in temperatures, with averages falling to 12°C (53°F) and maximums at 21°C (70°F). While September experiences 75 mm (2.9 in) of precipitation over 11 days, October's rainfall increases to 107 mm (4.2 in) over 16 days, reflecting a shift towards wetter conditions. Additionally, humidity levels rise from 79% in September to 89% in October, contributing to a more overcast atmosphere. For a detailed look at October's weather, visit Barnstaple weather in October.

September and November exhibit notable differences in weather patterns. In September, temperatures are generally warmer, with a minimum of 4°C (40°F) and a maximum of 27°C (81°F), presenting a mild average of 14°C (58°F). The month experiences 75 mm (2.9 in) of precipitation over 11 days, alongside a humidity level of 79%. In contrast, November ushers in cooler conditions, with temperatures ranging from a minimum of 0°C (33°F) to a maximum of 16°C (61°F), resulting in a chillier average of 9°C (48°F). This month also sees increased rainfall, accumulating to 90 mm (3.6 in) over 16 days, and a rise in humidity to 90%. For more details on November conditions, visit Barnstaple weather in November.

In September, temperatures range from a cool minimum of 4°C (40°F) to a warm maximum of 27°C (81°F), with an average temperature of 14°C (58°F). The month sees around 75 mm (2.9 in) of precipitation over approximately 11 days, with a humidity level of 79%. In contrast, December experiences significantly colder weather, with temperatures dropping to a minimum of 0°C (32°F) and a maximum of 13°C (57°F), averaging at 8°C (46°F). Precipitation increases to 122 mm (4.8 in), falling over about 19 days, and humidity rises to 89%. For more detailed information about December weather, visit Barnstaple weather in December.

Compare Barnstaple's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Barnstaple

As summer gives way to autumn, September in Barnstaple presents a unique blend of weather characteristics that set it apart from the vibrant months preceding it. While daytime temperatures can reach a comfortable maximum, the average remains noticeably cooler, reflecting the season's transition. With increased rainfall and slightly elevated humidity levels, this month can be quite variable, marked by an occasional chill that reminds residents of the approaching fall. This balance of warmth and moisture introduces a distinctive charm to the landscape, inviting both locals and visitors to embrace the beauty of the changing seasons. For a deeper dive into Barnstaple's weather patterns throughout the year, check out Barnstaple Climate.