September Weather in Barnard Castle, United Kingdom

Last updated: March 17, 2025

In September, Barnard Castle experiences a mix of mildly warm days and cooler nights, with a maximum temperature reaching up to 25°C (78°F) and an average of 12°C (54°F). Visitors should prepare for a moderately wet month, as precipitation amounts average around 81 mm (3.2 in) over 14 days. The air remains humid, with levels hovering around 87%, adding a refreshing chill to the atmosphere. This blend of weather elements makes September an interesting time to explore the historic charm of Barnard Castle, ideal for those who appreciate a touch of freshness on their adventures.

September Temperature in Barnard Castle

September in Barnard Castle marks a gentle transition into autumn, showcasing a delightful range of temperatures that invite outdoor exploration. With minimum temperatures around 2°C (36°F) and daily averages settling at 12°C (54°F), the weather is noticeably milder compared to the sweltering heights of summer. As the month progresses, daytime highs can reach a pleasant 25°C (78°F), making it one of the last chances to enjoy nature before the chill of fall sets in. This combination of comfortable warmth and crisp evenings captures the essence of early autumn, inviting both locals and visitors to savor leisurely strolls through the picturesque surroundings.

September Weather in Barnard Castle: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Barnard Castle, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec383941445055595854484339
Data source: Temperature data for Barnard Castle 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 Barnard Castle

September in Barnard Castle witnesses a moderate precipitation level, with 81 mm (3.2 in) of rain falling over 14 days. This amount represents a slight decrease compared to the wetter months of July and August, where rainfall reached 94 mm and 99 mm, respectively. The transition into autumn brings about a trend of increased rainfall as October typically sees a rise to 108 mm (4.3 in), suggesting that September's relatively milder weather is just a precursor to the wetter months ahead. Overall, the consistency of precipitation throughout late summer and early autumn underscores Barnard Castle's distinctive climate variability while preparing the landscape for the lushness of fall.

September Precipitation Trends in Barnard Castle

The chart displays monthly precipitation patterns in Barnard Castle, 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.
JanFebMarAprMayJunJulAugSepOctNovDec67109974671969499811088293
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Barnard Castle

As summer gives way to autumn, September in Barnard Castle experiences a notable increase in humidity, rising to 87%. This uptick follows the somewhat drier months of July and August, which both recorded lower levels of 83% and 82%, respectively. The transition into September signifies a return to the wetness often characteristic of the region, as humidity levels remain high through the latter part of the year, peaking again in November at 90%. This pattern suggests that while summer brings some respite, the chilly months are marked by a damp atmosphere, typical of the British climate. Overall, September acts as a bridge between the summer dry spells and the more humid conditions of autumn and winter.

September Average Humidity in Barnard Castle

This chart illustrates the average monthly humidity levels in Barnard Castle, 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%87%86%84%83%85%83%82%87%89%90%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Barnard Castle

As summer fades into autumn, the UV Index in Barnard Castle takes a gentle dip in September, settling at a comfortable 5 on the scale. This marks a transition from the high levels of summer exposure, where indices soared to 8, to a more moderate level that calls for sensible sun protection during peak hours. With a burn time of 30 minutes, residents and visitors alike can enjoy the waning warmth of early fall while being mindful of their skin. Looking ahead, October will see the Index fall further to 3, reminding everyone that the sun's intensity decreases as the days grow shorter. For a more detailed look at the UV Index throughout the year, check out Barnard Castle UV Index.

Maximum UV Index Levels in Barnard Castle for September

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

As September unfurls in Barnard Castle, the days are still bright, offering 297 hours of sunshine that linger pleasantly amidst the changing season. Following a warm summer peak in July with 403 hours, the sun begins to retreat gradually, yet September still shines more brightly than the cooler months ahead. The transition from the vibrant days of summer to the mellow tones of autumn is palpable as the sunlight softens, marking a gentle descent from the sun-drenched highs of June and July. This month serves as a delightful bridge, allowing residents and visitors to bask in the remaining warmth before the crispness of October sets in, which brings only 230 hours of sunshine.

Monthly Sunshine Duration in Barnard Castle: September Highlighted

The September sunshine duration represents the total number of hours Barnard Castle 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.
JanFebMarAprMayJunJulAugSepOctNovDec84h144h215h326h394h372h403h358h297h230h120h96h
Data source: Barnard Castle September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Barnard Castle During September

In Barnard Castle, September brings with it a 19% chance of sunny weather, positioning it among the months with a relatively low likelihood of sunshine. Following a modest summer, which peaks in July with a 32% chance, September sees a notable drop in sunny days, continuing the downward trend into the autumn months. Comparing this to the vibrant springs of April, where sunshine chances spike to 47%, it's clear that the later summer months are not particularly generous with sunlight. As the year progresses into October, the chances of sun decrease further to 18%, suggesting that those hoping for blue skies in September may want to manage their expectations as the season transitions into cooler weather.

Percentage of Sunny Days in September in Barnard Castle

The chart illustrates the percentage of sunny days in Barnard Castle 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 Barnard Castle experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec18%22%21%47%27%26%32%20%19%18%26%13%
Data source: Barnard Castle September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Barnard Castle in September

As summer gives way to autumn in Barnard Castle, September brings a gentle decline in daylight, with about 12 hours illuminating each day. This reflects a natural progression from the height of summer, when June boasts a generous 17 hours of daylight, gradually tapering off as the days grow shorter. The transition is palpable as August's 14 hours yield to September's softer light, setting the stage for the cozy charm of autumn. While the decreasing daylight can evoke a sense of wistfulness, it also heralds the arrival of stunning fall foliage, inviting residents and visitors alike to embrace the changing season.

Average Daylight Hours in Barnard Castle for September

The chart illustrates the variation in daylight duration in Barnard Castle throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec7h 55m9h 43m11h 54m14h 7m16h 5m17h 9m16h 35m14h 48m12h 38m10h 26m8h 26m7h 20m
Data source: Barnard Castle daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Barnard Castle

In September, Barnard Castle experiences a gentle breeze with an average wind speed of 3.4 m/s (8 mph), marking a slight increase from the calmer summer months. This transition reflects the gradual shift towards autumn, as the wind picks up from July’s low of 2.5 m/s (6 mph). Although September's winds are still relatively mild, they hint at the seasonal changes ahead. As autumn progresses, the wind speeds will rise again, reaching 4.8 m/s (11 mph) in October, creating a dynamic contrast to the typically subdued summer breezes. This pattern showcases nature’s rhythm, as Barnard Castle prepares for the more blustery conditions of the fall season.

Average September Wind Speed in Barnard Castle

The chart displays monthly wind speed patterns in Barnard Castle, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.04.94.63.03.23.22.53.33.4 m/s4.84.74.0
Data source: Barnard Castle September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Barnard Castle Compares to Other Months

The weather in Barnard Castle 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 Barnard Castle and find detailed weather information for every month.

September and January showcase distinct weather patterns, reflecting the transition between seasons. In September, temperatures range from a minimum of 2°C (36°F) to a pleasant maximum of 25°C (78°F), with an average of 12°C (54°F). This month experiences significant rainfall, totaling 81 mm (3.2 in) over approximately 14 days, while humidity levels remain high at 87%. In contrast, January presents a much cooler climate, with temperatures dipping to a minimum of -7°C (20°F), peaking at just 12°C (54°F) and averaging around 3°C (38°F). Precipitation is slightly less, measuring 67 mm (2.6 in) across about 11 days, and the humidity is just a bit higher at 89%. For more details on January weather, check out Barnard Castle weather in January.

In September, temperatures in Barnard Castle range from a minimum of 2°C (36°F) to a maximum of 25°C (78°F), with an average of 12°C (54°F). The month sees around 81 mm (3.2 in) of precipitation over 14 days, while humidity remains consistently high at 87%. In contrast, February experiences colder temperatures, with a minimum of -7°C (20°F) and a maximum of 16°C (62°F), averaging at just 4°C (39°F). Precipitation is higher in February at 109 mm (4.3 in) over 16 days, yet the humidity level remains the same at 87%. For more detailed information on February weather, you can check Barnard Castle weather in February.

In comparing September and March, we observe notable differences in weather characteristics. September typically enjoys milder temperatures, with a minimum of 2°C (36°F) and an average around 12°C (54°F), peaking at 25°C (78°F). The humidity is relatively high at 87%, alongside average precipitation of 81 mm (3.2 in) over 14 days. In contrast, March experiences colder conditions, with temperatures dropping to a minimum of -7°C (19°F) and an average of 5°C (41°F), reaching a maximum of 16°C (62°F). Although March has a slightly higher precipitation level at 97 mm (3.8 in) across 17 days, the humidity remains comparable at 85%. For more detailed insights on weather specifics during this month, check Barnard Castle weather in March.

When comparing the weather in September and April, we see notable differences in temperature and precipitation patterns. September generally enjoys milder temperatures, with a minimum of 2°C (36°F) and a comfortable average of 12°C (54°F), peaking at a warm 25°C (78°F). In contrast, April starts off cooler, with lows of -4°C (25°F) and an average temperature of 7°C (44°F), reaching a maximum of 21°C (70°F). Additionally, September experiences more rainfall, with 81 mm (3.2 in) of precipitation over 14 days, compared to April, which has only 46 mm (1.8 in) spread across 9 days. Humidity levels are quite similar, hovering around 87% in September and 84% in April. For a detailed look at April's climate, check out Barnard Castle weather in April.

In comparing the weather between September and May, we observe some notable differences and similarities. September typically experiences milder temperatures, with an average of 12°C (54°F) and a maximum reaching 25°C (78°F), while May's temperatures are slightly lower, averaging 10°C (50°F) with a maximum of 24°C (76°F). Both months have similar patterns in terms of precipitation, with September recording 81 mm (3.2 in) and May slightly less at 71 mm (2.8 in), each spread over approximately 14 days. Interestingly, humidity levels are fairly comparable, with September at 87% and May at 83%. For a closer look at May's specific weather patterns, you can explore Barnard Castle weather in May.

In comparing the weather of September and June, we find that both months exhibit similar temperature ranges, with September showing a minimum of 2°C (36°F) and a maximum of 25°C (78°F), while June's temperatures range from a minimum of 3°C (38°F) to a maximum of 26°C (79°F). The average temperatures are closely aligned, with September averaging 12°C (54°F) and June slightly higher at 13°C (56°F). However, September experiences slightly less precipitation at 81 mm (3.2 in) compared to June's 95 mm (3.8 in), although both months have a similar number of rainy days—14 for September and 13 for June. Humidity levels are also comparable, with September at 87% and June at 85%. For those interested in more specific details about June weather, you can find them here: Barnard Castle weather in June.

When comparing the weather in September and July, notable differences emerge. September typically experiences cooler temperatures, with a minimum of 2°C (36°F) and an average of 12°C (54°F), while July boasts warmer conditions, featuring a minimum of 5°C (42°F) and an average of 15°C (59°F). Additionally, July has a higher maximum temperature, reaching up to 30°C (86°F), compared to September's maximum of 25°C (78°F). In terms of precipitation, July records 94 mm (3.7 in) over 15 days, slightly more than September's 81 mm (3.2 in) spread across 14 days. Humidity levels are quite similar, with September at 87% and July at 83%. For more detailed insights on July weather, you can check Barnard Castle weather in July.

In comparing the weather of September and August, September generally presents cooler temperatures, with a minimum of 2°C (36°F) and an average of 12°C (54°F), as opposed to August's milder minimum of 6°C (42°F) and an average of 14°C (58°F). While August experiences slightly higher maximum temperatures, peaking at 28°C (82°F) compared to September's 25°C (78°F), it also sees more precipitation, with 99 mm (3.9 in) occurring over 18 days, whereas September receives 81 mm (3.2 in) over 14 days. Humidity is relatively high in both months, peaking at 87% in September compared to August's 82%. For more details on the weather in the earlier month, you can refer to Barnard Castle weather in August.

September and October exhibit distinct shifts in weather patterns. In September, temperatures range from a minimum of 2°C (36°F) to a maximum of 25°C (78°F), with an average of 12°C (54°F). The month sees 81 mm (3.2 in) of precipitation over 14 days and maintains a humidity level of 87%. In contrast, October brings cooler temperatures, with a minimum of -3°C (28°F) and a maximum of 19°C (67°F), averaging 9°C (49°F). Precipitation increases to 108 mm (4.3 in) over 17 days, and humidity slightly rises to 89%. For more detailed information on the weather, you can check Barnard Castle weather in October.

September typically experiences milder temperatures, with daily averages around 12°C (54°F) and highs reaching up to 25°C (78°F). In contrast, November sees a significant drop in temperature, averaging just 6°C (43°F), with maximums around 14°C (58°F) and even colder nights, dipping to a minimum of -5°C (24°F). Both months receive similar amounts of precipitation (81 mm or 3.2 in), but November tends to be slightly wetter, with rain over 15 days compared to September's 14 days. Humidity levels also rise in November, reaching 90% compared to September's 87%. For more details on the November weather conditions, you can visit Barnard Castle weather in November.

The weather in September is generally milder, with temperatures ranging from a minimum of 2°C (36°F) to a maximum of 25°C (78°F) and an average of 12°C (54°F). The month sees around 81 mm (3.2 in) of precipitation over 14 days, accompanied by high humidity levels of 87%. In contrast, December brings colder temperatures, with a minimum of -7°C (20°F) and a maximum of 12°C (54°F), averaging just 4°C (39°F). Precipitation increases slightly to 93 mm (3.7 in) over 15 days, and humidity remains high at 88%. For more detailed insights, check out Barnard Castle weather in December.

Compare Barnard Castle's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Barnard Castle

September in Barnard Castle presents a transition from the warmth of summer to the cooler embrace of autumn, with temperatures that can still reach a pleasant peak but average significantly lower than the peak summer months. Rainfall becomes more frequent, as evidenced by the number of rainy days throughout the month, leaving the landscape refreshed but also more humid than during the drier days of summer. This blend of warmth and moisture fosters a unique charm, marking the shift in seasons. For a deeper insight into weather trends, visit Barnard Castle Climate.