September Weather in Elstree, United Kingdom

Last updated: March 17, 2025

In September, Elstree, United Kingdom, experiences a delightful transition into autumn, with an average temperature of 15°C (59°F). The month sees maximum highs reaching 28°C (83°F), providing opportunities for warm outdoor activities, while cooler nights can drop to a brisk 3°C (38°F). While precipitation is fairly modest at 49 mm (1.9 in) over 10 days, the humidity level sits at a notable 82%, contributing to the overall crispness in the air. This blend of warmth and moisture sets the stage for a picturesque September in Elstree, perfect for enjoying the changing foliage and the onset of cozy evenings.

September Temperature in Elstree

In September, Elstree experiences a delightful transition into autumn, marked by a minimum temperature of 3°C (38°F) and an average of 15°C (59°F), providing a refreshing change from the summery highs of previous months. With a maximum temperature reaching 28°C (83°F), this month often showcases warm and pleasant days, ideal for outdoor activities. As the summer warmth begins to wane, the mild climate invites both locals and visitors to enjoy the beauty of early autumn, where the vibrant colors of nature start to emerge. This gradual decrease in temperature signals the onset of cooler evenings, setting the stage for the cozy months ahead.

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

The chart illustrates September temperature patterns in Elstree, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec404345495561656459534643
Data source: Temperature data for Elstree 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 Elstree

In September, Elstree experiences a transitional shift in precipitation, with an average rainfall of 49 mm (1.9 in), marking a decline from the humid summer months. This month typically sees about 10 days of rain, aligning closely with the preceding months of August and July, which averaged slightly higher at 72 mm and 67 mm respectively. As autumn approaches, the steady decrease in both the amount and duration of rainfall signals a shift towards the wetter months ahead, leading into October with its notable spike to 86 mm (3.4 in). Overall, September serves as a bridge, reflecting the changing seasons while maintaining Elstree’s characteristic moisture.

September Precipitation Trends in Elstree

The chart displays monthly precipitation patterns in Elstree, 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.
JanFebMarAprMayJunJulAugSepOctNovDec545156326574677249865183
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Elstree

As September unfolds in Elstree, United Kingdom, the humidity maintains a comfortable level at 82%, marking a gradual transition from the warmer months. This slight drop from August's 76% reflects the waning summer, yet it’s a noticeable improvement from the peak humidity levels seen in earlier months like January's 91% and November's 92%. The trend indicates a steady decline as the season shifts; while humidity begins to rise again in October, September stands out as a month of balance, where the lingering warmth of summer meets the crispness of autumn. This interplay of moisture creates an inviting atmosphere, perfect for enjoying the changing landscape.

September Average Humidity in Elstree

This chart illustrates the average monthly humidity levels in Elstree, 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%79%81%71%76%82%91%92%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Elstree

As September rolls into Elstree, the UV Index stands at 6, indicating a high exposure category and a burn time of 25 minutes. This month marks a transition from the peak summer UV levels of 8 seen in July and June, settling slightly lower but still requiring sun safety measures. The trend shows that even as autumn begins, the sun's intensity remains considerable, urging residents to be mindful of sun exposure during outdoor activities. With October on the horizon, the UV Index is expected to dip to 4, bringing more moderate conditions. For detailed insights and daily updates on UV exposure in Elstree, visit Elstree UV Index.

Maximum UV Index Levels in Elstree for September

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

As September unfolds in Elstree, the charm of summer lingers with a delightful average of 300 hours of sunshine, marking a graceful transition into autumn. This figure, while below the peak of summer months like July, which boasts a stellar 404 hours, still showcases the region's generous light as it ebbs from the sun-drenched heights of May and June. With a noticeable dip in daylight expected as October approaches, September offers a warm embrace, perfectly balancing the lingering warmth of summer with the anticipation of cooler days ahead. This month’s sunshine serves as a gentle reminder of the vibrant summer now behind us, while also hinting at the cozy glow of autumnal evenings.

Monthly Sunshine Duration in Elstree: September Highlighted

The September sunshine duration represents the total number of hours Elstree 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.
JanFebMarAprMayJunJulAugSepOctNovDec98h148h210h319h398h389h404h368h300h241h144h109h
Data source: Elstree September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Elstree During September

As September approaches in Elstree, UK, the chance of enjoying sunny weather stands at around 29%. This figure reflects a slight uptick compared to the summer months, though it remains lower than the heights of spring, particularly April's 48%. The transition into autumn tends to bring about less predictable weather, evidenced by August’s drop to 24% and the cooler October forecasts ahead. While September may not be the sunniest month of the year, it still offers a decent opportunity to bask in some late summer warmth before the chill of autumn sets in. Expect a mix of sunny spells and the traditional autumnal gloom, which might just make those sunny days feel even more special.

Percentage of Sunny Days in September in Elstree

The chart illustrates the percentage of sunny days in Elstree 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 Elstree experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec20%25%28%48%31%27%38%24%29%24%32%16%
Data source: Elstree September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Elstree in September

As summer wanes, September in Elstree, United Kingdom, marks a gentle transition in daylight duration, offering about 12 hours of sunlight. This month sees a gradual decrease from the sun-drenched days of July and August, which enjoy 16 and 14 hours of daylight, respectively. The pattern reflects a clear trend—longer days in the spring and summer months give way to shorter days as autumn approaches. Following September, daylight will continue to recede, dipping to 10 hours in October and further down to 8 hours by November. This ebbing of daylight reminds us of the changing seasons, each uniquely influencing the rhythm of life in Elstree.

Average Daylight Hours in Elstree for September

The chart illustrates the variation in daylight duration in Elstree throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 22m9h 57m11h 55m13h 54m15h 39m16h 34m16h 4m14h 30m12h 35m10h 36m8h 49m7h 52m
Data source: Elstree daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Elstree

In September in Elstree, United Kingdom, an unmistakable shift in the breeze occurs as the summer warmth gives way to early autumn, with average wind speeds dropping to 3.4 m/s (8 mph). This fluctuation marks a notable decrease from the more blustery months of spring and early summer, where winds consistently hovered around 4 m/s. Interestingly, September’s gentle winds set the tone for the upcoming months, leading into the slightly breezier October at 4.6 m/s (10 mph). Overall, the wind patterns throughout the year reveal a dynamic interplay, with the gentle September winds offering a peaceful transition before the autumn gales arrive, creating a serene atmosphere perfect for reflective strolls amidst the changing foliage.

Average September Wind Speed in Elstree

The chart displays monthly wind speed patterns in Elstree, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.44.94.63.54.33.33.44.03.4 m/s4.64.14.6
Data source: Elstree September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Elstree Compares to Other Months

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

In September, the weather typically experiences a milder temperature range, with minimums around 3°C (38°F) and maximums reaching up to 28°C (83°F), averaging 15°C (59°F). The month sees about 49 mm (1.9 in) of precipitation over approximately 10 days, accompanied by a humidity level of 82%. In contrast, January brings chillier conditions, with temperatures dipping to a minimum of -5°C (24°F) and peaking at 14°C (58°F), averaging only 5°C (41°F). Precipitation increases slightly to 54 mm (2.1 in) over the same number of days, while humidity rises to 91%. For more detailed January weather insights, you can check Elstree weather in January.

September and February present quite different weather patterns. In September, temperatures range from a minimum of 3°C (38°F) to a maximum of 28°C (83°F), with an average of 15°C (59°F). The month experiences about 49 mm (1.9 in) of precipitation over roughly 10 days and a humidity level of 82%. In stark contrast, February's temperatures are noticeably colder, with a minimum of -6°C (22°F) and a maximum of 18°C (65°F), averaging around 6°C (43°F). Precipitation is slightly higher at 51 mm (2.0 in) but occurs over 11 days, with a humidity level of 89%. For a more detailed look at February weather, you can visit Elstree weather in February.

September weather is characterized by a milder temperature range, with minimums around 3°C (38°F) and averages peaking at 15°C (59°F), while maximum temperatures can reach 28°C (83°F). Additionally, it typically experiences around 49 mm (1.9 in) of precipitation over 10 days and a humidity level of 82%. In contrast, March presents a cooler climate with minimum temperatures dropping to -6°C (22°F) and an average of 7°C (45°F), though maximum temperatures can still climb to 22°C (71°F). This month tends to receive slightly more precipitation at 56 mm (2.2 in) over 13 days, with humidity rising to 86%. For more details, you can check Elstree weather in March.

When comparing the weather between September and April, September boasts a more moderate climate with average temperatures around 15°C (59°F) and highs reaching up to 28°C (83°F). In contrast, April features cooler temperatures, with an average of 9°C (49°F) and minimums dipping to as low as -2°C (29°F). While both months experience precipitation, September sees more rainfall at 49 mm (1.9 in) over 10 days compared to April's 32 mm (1.3 in) across 8 days. The humidity levels are also slightly higher in April at 85%, whereas September has humidity at 82%. For more detailed information about April weather, you can visit Elstree weather in April.

In comparing the weather of September and May, we see some intriguing differences. September boasts a milder average temperature of 15°C (59°F) with highs reaching up to 28°C (83°F), while May's average sits slightly lower at 13°C (55°F) with a maximum of 26°C (79°F). Both months experience a comparable amount of rainfall; however, May has a higher total precipitation of 65 mm (2.5 in) over 11 days, compared to September's 49 mm (1.9 in) spread over 10 days. Interestingly, the humidity levels are somewhat elevated in September at 82%, compared to 79% in May. For those wanting to explore specific conditions during May, you can check Elstree weather in May.

When comparing the weather in September and June, there are some notable differences. September typically sees cooler temperatures, with a minimum of 3°C (38°F) and an average of 15°C (59°F), whereas June experiences higher temperatures, ranging from a minimum of 7°C (45°F) to an average of 16°C (62°F). The maximum temperatures in June can reach up to 31°C (88°F), while September peaks at a milder 28°C (83°F).

Precipitation is also higher in June, with 74 mm (2.9 in) over 10 days, compared to September’s 49 mm (1.9 in) across the same number of days. Humidity levels are similar, hovering around 80% in June and slightly higher at 82% in September. For more detailed information on June weather, you can check out Elstree weather in June.

When comparing the weather in September and July, we see notable differences in both temperature and precipitation. September features cooler temperatures, with a minimum of 3°C (38°F) and an average of 15°C (59°F), while July boasts warmer conditions, starting from a minimum of 9°C (48°F) to an average of 18°C (65°F) and even reaching a maximum of 36°C (96°F). Additionally, September experiences higher humidity at 82%, compared to July's 71%. Precipitation is also slightly more prevalent in July, totaling 67 mm (2.6 in) over 12 days, compared to September's 49 mm (1.9 in) over 10 days. For a detailed view of July's weather, check the link: Elstree weather in July.

In comparing the weather of September and August, September tends to be cooler with an average temperature of 15°C (59°F) compared to August's 18°C (64°F). The maximum temperature in September reaches 28°C (83°F), which is significantly lower than August's peak of 34°C (93°F). Additionally, September experiences more consistent rainfall, with 49 mm (1.9 in) of precipitation over 10 days, while August sees a total of 72 mm (2.8 in) over 13 days. Moreover, September has a higher humidity level at 82%, compared to August's 76%. For a detailed look at August weather patterns, check out Elstree weather in August.

In comparing the weather of September and October, we see a notable shift in temperatures and precipitation patterns. September features a milder temperature range with minimums around 3°C (38°F) and maximums peaking at 28°C (83°F), leading to an average of 15°C (59°F). In contrast, October ushers in colder conditions, with minimum temperatures dropping to 1°C (34°F) and an average decrease to 12°C (53°F), accompanied by a maximum of 23°C (73°F). Additionally, October experiences a significant increase in precipitation, totaling 86 mm (3.4 in) over 12 days compared to September's 49 mm (1.9 in) across 10 days. The humidity also climbs in October to 90%, compared to September's 82%. For more details, you can check Elstree weather in October.

In comparing the weather of September and November, we observe a notable shift in temperature and humidity. September typically enjoys milder conditions, with temperatures ranging from a minimum of 3°C (38°F) to an average of 15°C (59°F) and a maximum of 28°C (83°F). On the other hand, November experiences cooler temperatures, with a minimum of -2°C (29°F) and an average of 8°C (46°F), making it feel considerably chillier. While both months see similar levels of precipitation—49 mm (1.9 in) in September and 51 mm (2.0 in) in November—November features higher humidity at 92%, compared to September's 82%. For more details on November weather, you can visit Elstree weather in November.

September and December present a stark contrast in weather conditions. In September, temperatures range from a mild 3°C (38°F) at night to a warm 28°C (83°F) during the day, with an average temperature of 15°C (59°F). The month experiences around 49 mm (1.9 in) of precipitation over approximately 10 days, accompanied by a humidity level of 82%. In contrast, December sees much colder temperatures, with nighttime lows plunging to -5°C (23°F) and daytime highs averaging only 14°C (58°F), resulting in an average of 6°C (43°F). Precipitation increases to 83 mm (3.3 in), spread across 14 days, and humidity rises to 92%. For a more detailed look at December weather, you can refer to Elstree weather in December.

Compare Elstree's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Elstree

As summer transitions to autumn, September in Elstree brings a noticeable shift in weather patterns. With averages sitting at a comfortable 15°C, the month often experiences warm days that can peak at 28°C, but chilly nights are common as temperatures can dip to as low as 3°C. This time of year is marked by increased humidity at 82%, and a fair amount of rain—with about 49 mm falling over ten days. Compared to the hotter, drier months of summer, September balances warmth with refreshing coolness, making it a unique time to experience the emerging autumnal charm. For more insights into how weather conditions vary throughout the year, check out Elstree Climate.