September Weather in Herstmonceux, United Kingdom

Last updated: March 17, 2025

September in Herstmonceux, United Kingdom presents a captivating blend of late summer warmth and early autumn chill. With maximum temperatures reaching 27°C (82°F) and an average of 15°C (60°F), the month offers pleasant days, though nights can dip to a cool 2°C (37°F). Rain falls across approximately 10 days, accumulating to 53 mm (2.1 in), lending an 80% humidity that can make the air feel quite lush. This transitional period is perfect for experiencing the vibrant colors of nature as summer gradually yields to the more subdued tones of fall.

September Temperature in Herstmonceux

In Herstmonceux, United Kingdom, the month of September welcomes the gradual transition from summer's warmth to autumn's embrace. With temperatures ranging from a brisk 2°C (37°F) to a comforting 27°C (82°F), the average settles at a pleasant 15°C (60°F). This notable shift marks a significant drop in nighttime lows compared to the preceding summer months, hinting at the cooler days ahead. The warmth of early September, still echoing the summer's peak, begins to soften, making way for more refreshing autumnal breezes. Overall, September is marked by a gentle balance, inviting residents and visitors alike to enjoy the beauty of changing leaves against a backdrop of mild, yet crisp air.

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

The chart illustrates September temperature patterns in Herstmonceux, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec414346495561646459544744
Data source: Temperature data for Herstmonceux 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 Herstmonceux

September in Herstmonceux brings a mild introduction to autumn, characterized by an average precipitation of 53 mm (2.1 in) over 10 days. This amount reflects a slight decline from the wetter summer months, notably August's 70 mm (2.7 in), suggesting a gradual transition as the region prepares for the impending seasonal shift. The consistent pattern of around two to three inches of rainfall each month demonstrates the area's steady climate, while the number of rainy days remains relatively stable. As October approaches, residents can expect an increase in precipitation, with October's forecasted 91 mm (3.6 in) hinting at the more varied weather typical of fall. Overall, September serves as a gentle reminder of the changing season, balancing sunny days with occasional showers.

September Precipitation Trends in Herstmonceux

The chart displays monthly precipitation patterns in Herstmonceux, 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.
JanFebMarAprMayJunJulAugSepOctNovDec5560573666675670539168101
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Herstmonceux

September in Herstmonceux, United Kingdom, marks a noticeable shift in humidity, with levels averaging 80%. This slight increase follows the summer months when humidity dipped to a low of 73% in August, showcasing a transition towards the more humid conditions typical of autumn. As cooler temperatures set in, the air retains more moisture, reflected in the rise compared to the preceding months. Notably, humidity peaks again in the colder months, soaring to 92% in November and December. This pattern highlights the region's characteristic ebb and flow between drier summer air and the moist embrace of autumn and winter, creating a unique climate rhythm throughout the year.

September Average Humidity in Herstmonceux

This chart illustrates the average monthly humidity levels in Herstmonceux, 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.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%86%85%82%81%76%73%80%89%92%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Herstmonceux

In September, the UV Index in Herstmonceux reaches a respectable 6, categorizing exposure as high and suggesting a burn time of just 25 minutes. This marks a notable decrease from the peak summer months, yet it's still a time to be cautious under the sun. The transition from the very high UV levels of July and June to a moderate yet persistent high in September signals the changing seasons, as the atmospheric conditions begin to shift. As sunseekers enjoy the last rays of summer, it's essential to remain vigilant about sun protection. For more detailed information, check out the Herstmonceux UV Index.

Maximum UV Index Levels in Herstmonceux for September

The chart shows the monthly maximum UV Index (UVI) for Herstmonceux 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.
JanFebMarAprMayJunJulAugSepOctNovDec124578876421
Data source: Herstmonceux 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 Herstmonceux

September in Herstmonceux serves as a gentle transition from the vibrant summer months to the cooler autumn days. With 318 hours of sunshine, it comfortably sits in the middle of the spectrum, showcasing a generous amount of brightness as the days begin to shorten. This month notably follows the peak summer months of July and August, which boast 418 and 389 hours of sunshine respectively, reflecting a gradual yet significant decrease as the year progresses. The sunny days of September often invite lingering moments outdoors, perfect for enjoying the warm hues of early autumn leaves before the chill sets in. As autumn approaches, this month highlights the lingering warmth of summer while also hinting at the coziness of the approaching winter.

Monthly Sunshine Duration in Herstmonceux: September Highlighted

The September sunshine duration represents the total number of hours Herstmonceux 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.
JanFebMarAprMayJunJulAugSepOctNovDec97h152h225h339h409h409h418h389h318h248h155h113h
Data source: Herstmonceux September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Herstmonceux During September

September in Herstmonceux, United Kingdom, presents a modest chance of sunny weather, with approximately 35% likelihood of sunshine gracing the skies. This reflects a slight uptick from the summer months of July and August, which see average probabilities of 40% and 34%, respectively. As autumn approaches, the likelihood of sun dips compared to the vibrant spring months, particularly April, which boasts the highest chance at 54%. While September is not the sunniest month on record, it serves as a transitional period where the lingering warmth of summer still beckons, making it an appealing time to enjoy the outdoors before the days grow shorter and cloudier.

Percentage of Sunny Days in September in Herstmonceux

The chart illustrates the percentage of sunny days in Herstmonceux 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 Herstmonceux experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec22%26%37%54%38%31%40%34%35%28%34%19%
Data source: Herstmonceux September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Herstmonceux in September

As summer fades into autumn, September in Herstmonceux offers a gentle transition in daylight, with about 12 hours of sunlight. This month marks a decrease from the luminous 16 hours experienced in June, gradually leading to the shorter days of October. After a peak in May at 15 hours, the daylight begins to wane, yet September delights with a balance that still embraces the lingering warmth of summer days. As nature prepares for the upcoming winter, the diminishing daylight serves as a reminder of the cyclical beauty of the seasons, making September a perfect time to appreciate the soft golden hues of early autumn.

Average Daylight Hours in Herstmonceux for September

The chart illustrates the variation in daylight duration in Herstmonceux throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 28m10h 1m11h 55m13h 51m15h 33m16h 26m15h 58m14h 27m12h 34m10h 38m8h 54m7h 59m
Data source: Herstmonceux daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Herstmonceux

As September arrives in Herstmonceux, the winds begin to mellow, with an average speed of 3.7 m/s (8 mph)—a gentle breeze signaling the transition from summer to autumn. This decrease follows a modest upward trend from the lighter breezes of late spring, where wind speeds hovered around 4.8 m/s (11 mph) in May. The shift to September marks a notable drop from the more vigorous gusts of earlier months, particularly August's 4.3 m/s (10 mph). As the year progresses, it seems that crisp autumn air is just on the horizon, setting the stage for a cozy season characterized by shifting leaves and a serene atmosphere, even as October is poised to bring a slight resurgence, with wind speeds increasing once more to 5.0 m/s (11 mph).

Average September Wind Speed in Herstmonceux

The chart displays monthly wind speed patterns in Herstmonceux, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.75.34.84.04.83.33.84.33.7 m/s5.04.04.9
Data source: Herstmonceux September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Herstmonceux Compares to Other Months

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

September and January present a striking contrast in weather conditions. In September, temperatures range from a mild 2°C (37°F) at night to a warm 27°C (82°F) during the day, with an average of 15°C (60°F). While there is notable humidity at 80%, the month experiences around 53 mm (2.1 in) of precipitation spread over 10 days. In stark contrast, January temperatures dip much lower, with minimums of -5°C (24°F) and a maximum of only 13°C (56°F), averaging 5°C (41°F). The humidity increases to 91%, and precipitation is slightly higher at 55 mm (2.2 in) over the same number of days. For more detailed insights about January weather, you can visit Herstmonceux weather in January.

When comparing the weather between September and February, notable differences emerge in temperature and precipitation patterns. September experiences milder temperatures, ranging from a minimum of 2°C (37°F) to a maximum of 27°C (82°F), with an average of 15°C (60°F). In contrast, February is much colder, with temperatures ranging from -7°C (20°F) to 16°C (62°F) and an average of 6°C (43°F). While September sees about 53 mm (2.1 in) of precipitation over 10 days, February has slightly higher precipitation at 60 mm (2.4 in) spread out over 12 days. Additionally, humidity in February is slightly elevated at 89%, compared to September's 80%. For more details, you can check Herstmonceux weather in February.

When comparing the weather in September and March, significant differences emerge. September boasts milder temperatures, with average highs reaching 27°C (82°F) compared to March's maximum of 20°C (67°F). The minimum temperatures in September are also more forgiving, starting at 2°C (37°F), while March can dip as low as -6°C (22°F). Precipitation is slightly higher in March at 57 mm (2.2 in) over about 13 days, compared to September's 53 mm (2.1 in) over 10 days. Humidity levels are also a bit higher in March at 86%, compared to September's 80%. For a detailed look at March weather, you can visit Herstmonceux weather in March.

In comparing the weather of September and April, we see notable differences in temperature and precipitation. September enjoys a broader temperature range, with minimums of 2°C and maximums reaching up to 27°C, averaging around 15°C. In contrast, April experiences cooler conditions with temperatures ranging from a minimum of -2°C to a maximum of 23°C, yielding an average of just 9°C. Precipitation also differs slightly, with September receiving 53 mm over 10 days, compared to April's 36 mm over 9 days. Humidity levels are fairly high in both months, with April slightly higher at 85% compared to September's 80%. For more detailed insights on April weather, you can refer to Herstmonceux weather in April.

In September, temperatures range from a chilly minimum of 2°C (37°F) to a warm maximum of 27°C (82°F), with an average of 15°C (60°F). The month experiences about 53 mm (2.1 in) of rainfall over approximately 10 days and maintains a humidity level of 80%. In contrast, May brings slightly cooler temperatures, with a minimum of 1°C (33°F) and a maximum of 25°C (77°F), averaging 13°C (55°F). Rainfall is higher in May at 66 mm (2.6 in) across 11 days, while humidity remains consistent at 82%. For more detailed information about May weather, you can visit Herstmonceux weather in May.

September and June exhibit notable differences in weather patterns. In September, temperatures range from a brisk minimum of 2°C (37°F) to a comfortable maximum of 27°C (82°F), with an average temperature of 15°C (60°F). The month sees about 53 mm (2.1 in) of precipitation over approximately 10 days, and humidity levels hover around 80%. In contrast, June features warmer conditions, with a minimum of 8°C (46°F) and a maximum of 30°C (87°F), while maintaining a similar average temperature of 16°C (61°F). Precipitation in June is slightly higher, totaling 67 mm (2.6 in) over approximately 8 days, with humidity at a comparable 81%. For further details, check out Herstmonceux weather in June.

In comparing the weather of September and July, notable differences emerge in temperature and overall conditions. September has a wider temperature range with a minimum of 2°C (37°F) and a maximum of 27°C (82°F), averaging around 15°C (60°F). In contrast, July tends to be significantly warmer, with minimum temperatures of 9°C (49°F) and maximums reaching up to 35°C (95°F), averaging 18°C (65°F). While September experiences slightly less precipitation at 53 mm (2.1 in) over approximately 10 rainy days, July records around 56 mm (2.2 in) of rainfall across 11 days. Interestingly, September has a higher humidity level at 80%, compared to July’s 76%. For a more detailed look at July's weather conditions, you can check Herstmonceux weather in July.

In comparing the weather patterns of September and August, September presents a cooler climate with temperatures ranging from a minimum of 2°C (37°F) to a maximum of 27°C (82°F), averaging 15°C (60°F). In contrast, August is generally warmer, with temperatures fluctuating between 8°C (47°F) and 32°C (90°F), averaging 18°C (64°F). Moreover, September experiences slightly lower precipitation at 53 mm (2.1 in) over 10 days, compared to August's 70 mm (2.7 in) across 12 days. Humidity levels also differ, standing at 80% in September versus 73% in August, indicating a more humid atmosphere as summer transitions into autumn. For a detailed outlook, check the Herstmonceux weather in August.

September and October exhibit notable differences in weather patterns. September tends to be warmer, with average temperatures around 15°C (60°F) and a maximum of 27°C (82°F), while October sees a drop in average temperature to 12°C (54°F) and a maximum of 22°C (71°F). Additionally, October experiences increased precipitation, accumulating 91 mm (3.6 in) over 14 days compared to September's 53 mm (2.1 in) over 10 days. The humidity also rises slightly in October to 89%, up from September's 80%. For more details about October's weather, you can check Herstmonceux weather in October.

The weather in September is generally milder, with temperatures ranging from a minimum of 2°C (37°F) to a maximum of 27°C (82°F), and an average of 15°C (60°F). It experiences about 53 mm (2.1 in) of precipitation over approximately 10 days, along with a humidity level of 80%. In contrast, November ushers in cooler temperatures, with a range from -2°C (28°F) to a maximum of 16°C (62°F) and an average of 8°C (47°F). This month also sees increased precipitation, totaling 68 mm (2.7 in) across 11 days, and higher humidity at 92%. For more detailed information, you can explore Herstmonceux weather in November.

September typically experiences a mild climate, with average temperatures ranging from a minimum of 2°C (37°F) to a maximum of 27°C (82°F). The month sees about 53 mm (2.1 in) of rainfall over approximately 10 days, and humidity levels hover around 80%. In contrast, December brings colder conditions, with average temperatures falling between -3°C (27°F) and 14°C (58°F). This month is wetter, accumulating around 101 mm (4.0 in) of precipitation over approximately 14 days, accompanied by higher humidity levels at 92%. For more detailed information, you can check out Herstmonceux weather in December.

Compare Herstmonceux's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Herstmonceux

As September rolls in, Herstmonceux experiences a noticeable shift in weather, transitioning from the warmth of summer to the crisp beginnings of autumn. With average temperatures settling around 15°C (60°F), the month offers a refreshing relief compared to the sweltering highs of July and August. Although maximum temperatures can still reach up to 27°C (82°F), the cooler nights, dipping to a brisk 2°C (37°F), remind us of the changing seasons. Precipitation becomes more frequent with about 10 rainy days, contributing to a humidity level of 80%, which creates a lush and vibrant landscape. For a deeper insight into seasonal variations, check out the comprehensive details at Herstmonceux Climate.