September Weather in Blackheath, United Kingdom

Last updated: March 17, 2025

September in Blackheath, United Kingdom, showcases a delightful range of temperatures, with a maximum reaching a warm 28°C (83°F) and a minimum dipping to a cool 4°C (40°F). The average temperature settles comfortably at 15°C (60°F), providing a pleasant backdrop for outdoor activities. Visitors should be prepared for some rainfall, as the month records 45 mm (1.8 in) of precipitation over nine days, while maintaining a humidity level of 80%. This blend of mild warmth and occasional showers makes September a unique transitional month in Blackheath, perfect for exploration and enjoying the vibrant autumn scenery.

September Temperature in Blackheath

As summer fades and autumn approaches, September in Blackheath showcases a delightful transition in temperatures. With a minimum of 4°C (40°F) and a pleasant average of 15°C (60°F), the month offers a refreshing respite from the height of summer. Peak temperatures can reach up to 28°C (83°F), allowing for just a few more warm days before cooler weather settles in. This gradual decline in heat is mirrored in the shifting scenery of the landscape, making September an enchanting time for both residents and visitors to embrace the changing season. As leaves start to turn, the crisp air invigorates the spirit, inviting outdoor exploration amidst the fading warmth.

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

The chart illustrates September temperature patterns in Blackheath, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec414346495562656459544643
Data source: Temperature data for Blackheath 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 Blackheath

In September, Blackheath experiences a modest precipitation of 45 mm (1.8 in) across 9 rainy days, marking a slight decrease from the wetter summer months of July and August. This trend towards lower rainfall hints at the transition into autumn, as September typically signals a shift in weather patterns. The overall cumulative precipitation during the month maintains a balance with the earlier months of spring, which saw higher rainfall totals, while still providing the essential moisture that sustains the lush greenery of the region. As the days get shorter and cooler, Blackheath's September weather sets the stage for the more significant precipitation expected in October.

September Precipitation Trends in Blackheath

The chart displays monthly precipitation patterns in Blackheath, 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.
JanFebMarAprMayJunJulAugSepOctNovDec545253326377647245814884
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Blackheath

In September, humidity levels in Blackheath, United Kingdom, typically settle at a comfortable 80%, which marks a slight uptick from the summer months. This increase follows a gradual decline from 91% in January to a low of 73% in August, showcasing the transition from the balmy summer air back to the more moisture-laden atmosphere of early autumn. As the season wanes, humidity begins to climb again, hinting at the wetter months ahead, notably October and November, when levels soar back to 89% and 92%, respectively. This trend reflects the characteristic shift in Blackheath's climate, where each season brings its unique signature blend of dampness and freshness.

September Average Humidity in Blackheath

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

As September rolls into Blackheath, the UV Index reflects a steady decline from the peak summer months, showing a high index of 6. This means residents and visitors should remain cautious, as the burn time is approximately 25 minutes for unprotected skin. Following a summer of very high indices in June and July (both at 8), there’s a slight easing, though vigilance against UV exposure is still necessary. Overall, the trend reveals a gradual transition towards milder sun conditions, as the region prepares for autumn. For more precautions and detailed information, visit the Blackheath UV Index.

Maximum UV Index Levels in Blackheath for September

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

September in Blackheath, United Kingdom, brings a delightful transition into autumn, showcasing an impressive 300 hours of sunshine. This marks a slight dip from the summer peak of 405 hours in July, yet it's a notable retention of brightness as the days begin to shorten. The trend of increasing daylight hours from January's 95 hours peaks in the summer months, with September maintaining a substantial amount of sunshine compared to the earlier months of the year. As the seasons shift, the lingering warmth of September offers a perfect backdrop for enjoying the vibrant hues of autumn foliage, making it a cherished time in the rhythm of the year.

Monthly Sunshine Duration in Blackheath: September Highlighted

The September sunshine duration represents the total number of hours Blackheath 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.
JanFebMarAprMayJunJulAugSepOctNovDec95h146h211h319h398h393h405h372h300h240h142h106h
Data source: Blackheath September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Blackheath During September

In Blackheath, September offers a modest 29% chance of sunny weather, marking a slight decline in sunshine compared to the spring peak of April at 49%. While it's a month of transition into autumn, the likelihood of clear skies remains relatively stable when compared to the summer months, with July enjoying the highest probability at 39%. This trend suggests that while sunny days are achievable, they are less frequent as the year progresses. As the days shorten and temperatures cool, the mix of cloud and sun becomes more common, hinting at a beautiful yet unpredictable change in the Blackheath landscape.

Percentage of Sunny Days in September in Blackheath

The chart illustrates the percentage of sunny days in Blackheath 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 Blackheath experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec19%25%29%49%34%29%39%26%29%25%32%17%
Data source: Blackheath September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Blackheath in September

As summer fades and autumn approaches in Blackheath, UK, September heralds a noticeable shift in daylight, offering a balance of 12 hours of sunlight. Following the sun-drenched months of June and July, where daylight reaches its peak at 16 hours, September's brightness begins to wane, yet remains generous compared to the shorter days ahead in October and November. This gradual decrease mirrors the transition of the seasons, with September blending the lingering warmth of summer days and the impending cooler months. As the leaves hint at their seasonal change, residents can relish the residual sunlight before the days shorten further, marking the rhythm of nature's cycle.

Average Daylight Hours in Blackheath for September

The chart illustrates the variation in daylight duration in Blackheath throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 23m9h 58m11h 55m13h 54m15h 38m16h 33m16h 4m14h 30m12h 35m10h 36m8h 49m7h 53m
Data source: Blackheath daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Blackheath

As September rolls into Blackheath, the gentle breezes begin to whisper a transition from the summer's warmth to the crisp embrace of autumn. With an average wind speed of 3.2 m/s (7 mph), this month witnesses a notable dip in wind activity compared to the bustling summer months. Following peaks seen earlier in the year, notably in March and October, September's moderate winds create a serene atmosphere, perfect for leisurely strolls under canopies of turning leaves. This slight lull paves the way for the more robust gusts that arrive later in the fall, signaling nature's gradual shift toward the chillier days ahead.

Average September Wind Speed in Blackheath

The chart displays monthly wind speed patterns in Blackheath, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.14.64.43.44.23.03.33.83.2 m/s4.33.74.3
Data source: Blackheath September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Blackheath Compares to Other Months

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

September and January present strikingly different weather conditions. In September, temperatures range from a mild 4°C (40°F) at night to a warm 28°C (83°F) during the day, with an average of 15°C (60°F). This month experiences about 45 mm (1.8 in) of precipitation over 9 days, accompanied by relatively high humidity at 80%. In contrast, January sees much colder temperatures, with a minimum of -5°C (24°F) and a maximum of 14°C (58°F), averaging around 5°C (41°F). While January has slightly more precipitation at 54 mm (2.1 in) over the same number of rainy days, the humidity rises to 91%, contributing to a chillier and damp atmosphere. For more detailed insights, check out Blackheath weather in January.

September and February present distinctly different weather patterns. In September, temperatures range from a minimum of 4°C (40°F) to a maximum of 28°C (83°F), with an average of 15°C (60°F), making it a mild and pleasant month. The precipitation level is moderate at 45 mm (1.8 in) over approximately 9 days, accompanied by a humidity of 80%. In contrast, February sees lower temperatures, with a minimum of -7°C (21°F) and a maximum of 18°C (65°F), averaging around 6°C (43°F). Precipitation slightly increases to 52 mm (2.0 in) over about 11 days, along with higher humidity levels at 89%. For more detailed insights on February weather, you can explore Blackheath weather in February.

Comparing the weather in September and March reveals notable differences. In September, temperatures range from a minimum of 4°C (40°F) to a comfortable average of 15°C (60°F), peaking at 28°C (83°F). The month also experiences about 45 mm (1.8 in) of precipitation over roughly 9 days, with humidity sitting at 80%. In contrast, March is cooler, with temperatures ranging from a minimum of -5°C (23°F) to an average of 8°C (46°F) and a maximum of 22°C (72°F). This month has slightly more precipitation at 52 mm (2.1 in) over 13 days, and a higher humidity level of 86%. For a detailed look at the weather specifics in March, you can visit Blackheath weather in March.

September and April present distinct weather characteristics. In September, temperatures range from a minimum of 4°C (40°F) to a maximum of 28°C (83°F), with an average of 15°C (60°F). The month sees about 45 mm (1.8 in) of precipitation over 9 days, and humidity levels are around 80%. In contrast, April experiences cooler temperatures, with a minimum of -2°C (29°F) and a maximum of 26°C (80°F), averaging at 10°C (49°F). This month receives slightly less precipitation, totaling 32 mm (1.3 in) across 7 days, and has a marginally higher humidity of 85%. For a detailed look at April weather, visit Blackheath weather in April.

In comparing the weather between September and May, we see that September tends to experience slightly warmer temperatures, with average highs reaching up to 28°C (83°F) compared to May’s maximum of 25°C (78°F). On the other hand, May has lower minimum temperatures, starting at 1°C (34°F), while September's temperatures begin at 4°C (40°F). Rainfall is also notable, with May receiving 63 mm (2.5 in) over 10 days, compared to September’s 45 mm (1.8 in) over 9 days. Humidity levels are similar in both months, with May at 82% and September at 80%. For more detailed insights, you can check out Blackheath weather in May.

In comparing the weather of September and June, we see notable differences in temperature and precipitation patterns. September offers a wider temperature range, with a minimum of 4°C and a maximum of 28°C, averaging around 15°C. In contrast, June starts warmer, with temperatures ranging from a minimum of 7°C to a maximum of 32°C, averaging 17°C. Precipitation also varies, as September receives 45 mm over 9 days, while June experiences higher rainfall at 77 mm spread across 8 days. Humidity levels remain similar, with September at 80% and June slightly higher at 81%. For more detailed weather insights, check Blackheath weather in June.

When comparing the weather of September and July, it’s clear that July is typically warmer and more humid. July boasts a minimum temperature of 9°C (49°F) and can reach a maximum of 36°C (97°F), with an average temperature of 18°C (65°F). In contrast, September has a cooler range, with minimums around 4°C (40°F) and maximums peaking at 28°C (83°F), leading to a more moderate average of 15°C (60°F). Additionally, July experiences slightly more precipitation, totaling 64 mm (2.5 in) over 11 days, compared to September’s 45 mm (1.8 in) over 9 days. Despite the rainfall, July remains relatively less humid at 76%, while September sees humidity levels rise to 80%. For more detailed insights, check out Blackheath weather in July.

In comparing the weather between August and September, we see a notable shift in temperatures and precipitation patterns. August tends to be warmer, with minimum temperatures around 8°C (47°F) and an average of 18°C (64°F), reaching a peak of 34°C (94°F). In contrast, September experiences cooler nights, with minimum temperatures dropping to 4°C (40°F) and averaging at 15°C (60°F), although it can still reach a maximum of 28°C (83°F).

Precipitation also varies, with August receiving more rain—72 mm (2.8 in) over 12 days—compared to September's 45 mm (1.8 in) over 9 days. Additionally, humidity levels are higher in September at 80%, compared to 73% in August. For more specific details, you can explore the Blackheath weather in August.

September generally offers milder temperatures, with a minimum of 4°C (40°F) and an average high of 28°C (83°F), while October sees a noticeable drop, featuring a minimum of 1°C (34°F) and an average high of 23°C (73°F). Additionally, September experiences less precipitation, totaling 45 mm (1.8 in) over 9 days, compared to October's 81 mm (3.2 in) across 12 days. Humidity levels also rise in October, reaching 89%, up from 80% in September. For more details on the specific weather conditions in October, you can visit Blackheath weather in October.

September and November present quite different weather patterns. In September, temperatures range from a minimum of 4°C (40°F) to a maximum of 28°C (83°F), with an average of 15°C (60°F). The month sees about 45 mm (1.8 in) of precipitation over approximately 9 days, accompanied by a relatively high humidity level of 80%. In contrast, November experiences cooler temperatures, with a minimum of -2°C (28°F) and a maximum of 17°C (62°F), resulting in an average of 8°C (47°F). Precipitation slightly increases to 48 mm (1.9 in) over 10 days, and humidity rises to 92%, making it feel much wetter. For more details, you can check Blackheath weather in November.

September and December present notably different weather patterns. In September, temperatures range from a minimum of 4°C (40°F) to a maximum of 28°C (83°F), with an average of 15°C (60°F). The month experiences around 45 mm (1.8 in) of precipitation over 9 days, accompanied by a humidity level of 80%. In contrast, December brings colder conditions, with temperatures dropping to a minimum of -4°C (25°F) and a maximum of 14°C (58°F), averaging around 6°C (44°F). Precipitation increases significantly to 84 mm (3.3 in) over 14 days, and humidity rises to 92%. For more details, you can check Blackheath weather in December.

Compare Blackheath's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Blackheath

September in Blackheath showcases a distinct transition from the warm summer months to the cooler autumn season. With temperatures averaging a comfortable 15°C (60°F) and occasional highs reaching 28°C (83°F), the month offers pleasant days that often invite outdoor activities. However, September also brings increased humidity and about nine days of rainfall, contributing to a more variable climate compared to the drier, warmer summer. This blend of conditions makes September a captivating time to experience Blackheath's natural beauty as the landscape begins to transform. For a detailed understanding of the seasonal shifts throughout the year, visit Blackheath Climate.