September Weather in Petworth, United Kingdom

Last updated: March 17, 2025

In September, Petworth, United Kingdom, experiences a delightful transition into autumn, with daytime temperatures peaking at a comfortable 27°C (81°F) and an average of 15°C (60°F). While the nights can dip to a brisk 3°C (37°F), the month invites outdoor activities amidst a backdrop of changing foliage. With 48 mm (1.9 in) of rainfall over 9 days, visitors should be prepared for the occasional shower, contributing to the region's lush landscape. The high humidity at 82% adds a touch of warmth to the crisp air, making early autumn in Petworth a uniquely charming experience.

September Temperature in Petworth

As September rolls into Petworth, the temperature begins to showcase a delightful shift towards autumn. The month typically sees a minimum of 3°C (37°F), offering a brisk start to the day, while the average climbs to a comfortable 15°C (60°F), perfect for outdoor activities. Just as the leaves begin to change, the maximum temperature can reach a pleasant 27°C (81°F), hinting at the lingering warmth of summer. This transitional phase often presents a mix of sunny days and cooler evenings, marking the perfect time to explore Petworth’s scenic landscapes and enjoy the crisp air. Overall, September’s temperatures reflect the beauty of change, blending summer’s warmth with the refreshing coolness of fall.

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

The chart illustrates September temperature patterns in Petworth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec414346495561656359544745
Data source: Temperature data for Petworth 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 Petworth

In September, Petworth experiences a notable dip in precipitation, with 48 mm (1.9 in) of rain falling over 9 days. This marks a decrease compared to the wetter summer months of July and August, which saw 58 mm (2.3 in) and 66 mm (2.6 in) respectively. The transition into autumn brings a sense of calm, as the region prepares for the anticipated increase in rainfall during the colder months ahead, particularly with October's average soaring to 90 mm (3.6 in). This seasonal shift underscores the typical British climate pattern, where September serves as a bridge, gently easing from the warm, rainy days of summer into the more unsettled weather characteristic of late fall.

September Precipitation Trends in Petworth

The chart displays monthly precipitation patterns in Petworth, 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.
JanFebMarAprMayJunJulAugSepOctNovDec525657346172586648906394
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Petworth

As September rolls into Petworth, the humidity settles at 82%, marking a noticeable uptick following the drier summer months. After experiencing a low of 71% in July, humidity levels gradually rose through August, and while September offers a brief respite from the summer heat, it maintains a comfortable level compared to the snug embrace of winter that awaits in October, when humidity spikes back up to 90%. This trend illustrates the transitional nature of September, where the air retains some warmth yet becomes increasingly saturated, paving the way for the wetter months ahead. Embracing the refreshing shifts of fall, Petworth's atmosphere invites residents to enjoy the lingering warmth before the more humid, cooler days set in.

September Average Humidity in Petworth

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

As September settles in Petworth, the UV Index hits a noteworthy 6, indicating a high exposure category with a burn time of just 25 minutes. This month marks a gradual decline from the peak summer UV levels seen in July and August, which reached 8, yet it remains a time for caution when enjoying the outdoors. The transition from summer's intense rays to the milder autumn light is evident, but sunlight can still be potent. It’s essential to stay protected, especially during midday hours. For more detailed information on UV trends throughout the year, visit Petworth UV Index.

Maximum UV Index Levels in Petworth for September

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

As summer gracefully transitions into autumn, September in Petworth boasts 309 hours of sunshine, marking a gentle decline from the vibrant long days of July and August. This month captures the essence of early fall days, where sunlight dances upon the changing leaves, creating picturesque vistas. Interestingly, while May and June enjoy the most radiant exposure, September still offers a generous glow that warms the heart before the chill of October sets in. As daylight hours shorten, the charm of sunshine-clad Petworth remains captivating, showcasing nature's beauty in a softer light. This trend illustrates how every month has its own unique appeal, with September serving as a bridge from summer's brilliance to autumn's cozy embrace.

Monthly Sunshine Duration in Petworth: September Highlighted

The September sunshine duration represents the total number of hours Petworth 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.
JanFebMarAprMayJunJulAugSepOctNovDec99h148h209h326h405h396h408h375h309h244h149h112h
Data source: Petworth September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Petworth During September

As September rolls into Petworth, UK, the likelihood of sunny weather shows a modest chance of 33%, suggesting that while the days may not be as bright as the peak summer months, there's still the potential for enjoyable sunshine. This percentage indicates a slight uptick from August's 30%, reflecting a gradual transition from the summer warmth but with more variability. Historically, September's sun chances are better than the chilly months of January and December, though they remain below the spring peak in April at 55%. Overall, while September may not boast the best odds for sun, it still offers a chance for delightful outdoor moments as the season changes.

Percentage of Sunny Days in September in Petworth

The chart illustrates the percentage of sunny days in Petworth 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 Petworth experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec22%27%36%55%38%29%40%30%33%29%36%21%
Data source: Petworth September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Petworth in September

As September arrives in Petworth, United Kingdom, daylight begins to wane, marking a transition from the vibrant long days of summer to the shorter, cozy days of autumn. With approximately 12 hours of daylight, September offers a more balanced light experience compared to the sun-drenched months of June and July, which basked in up to 16 hours. The gradual decline in daylight from July's peak sets the stage for a cozy shift, as the daylight hours dwindle down to 10 hours by October. This rhythmic ebb and flow not only enhances the beauty of the changing seasons but also invites us to embrace the warmth of gatherings and the tranquility of nature's transformation.

Average Daylight Hours in Petworth for September

The chart illustrates the variation in daylight duration in Petworth 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 52m15h 33m16h 26m15h 58m14h 27m12h 34m10h 38m8h 54m7h 59m
Data source: Petworth daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Petworth

As September rolls in Petworth, the average wind speed settles at a gentle 3.6 m/s (8 mph), marking a subtle shift toward calmer breezes compared to the earlier months. This trend of decreasing wind speeds emerges after the summer months, where the winds reached their peak in August at 4.1 m/s (9 mph). Notably, this seasonal drop is part of a broader pattern; it’s a time when the vitality of summer wanes, giving way to the brisker winds of autumn that typically return in October. Throughout the year, Petworth experiences varied gusts, peaking in the colder months of winter and early spring, yet September stands out as a transitional phase—a serene prelude to the more vigorous winds that lie ahead.

Average September Wind Speed in Petworth

The chart displays monthly wind speed patterns in Petworth, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.85.34.73.74.73.23.64.13.6 m/s4.84.04.8
Data source: Petworth September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Petworth Compares to Other Months

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

September weather is characterized by milder temperatures, with minimums around 3°C (37°F) and maximums reaching 27°C (81°F), resulting in an average of 15°C (60°F). The month sees about 48 mm (1.9 in) of precipitation over 9 days, accompanied by a humidity level of 82%. In contrast, January brings colder conditions, with temperatures ranging from a minimum of -4°C (25°F) to a maximum of 14°C (57°F), averaging just 5°C (42°F). Although precipitation slightly increases to 52 mm (2.0 in) over the same number of days, the humidity rises to 91%, making January feel notably chillier and damper. For a more detailed perspective on January weather, you can visit Petworth weather in January.

September and February present quite contrasting weather patterns. In September, temperatures range from a mild 3°C (37°F) at their lowest to a warm 27°C (81°F) at their peak, with a comfortable average of 15°C (60°F). This month sees around 48 mm (1.9 in) of precipitation over approximately 9 days, accompanied by a relatively lower humidity of 82%. In stark contrast, February provides a chillier environment, with minimum temperatures dipping to -5°C (23°F) and an average of 6°C (44°F). This month tends to be slightly wetter, with 56 mm (2.2 in) of precipitation spread over about 11 days and a higher humidity level of 89%. For more information about February weather, you can visit Petworth weather in February.

When comparing the weather between September and March, notable differences in temperature and precipitation emerge. September experiences milder temperatures with a minimum of 3°C (37°F) and an average of 15°C (60°F), peaking at 27°C (81°F). In contrast, March is decidedly cooler, showcasing a minimum of -6°C (22°F) and an average of 8°C (46°F), with a maximum of 19°C (66°F). Additionally, September sees 48 mm (1.9 in) of precipitation over 9 days, while March is slightly wetter, with 57 mm (2.2 in) falling over 13 days. Humidity levels are comparable, remaining high at 82% in September and slightly higher at 86% in March. For more detailed insights on March weather, you can visit Petworth weather in March.

When comparing the weather in September to April, it is evident that September enjoys warmer temperatures, with averages around 15°C (60°F) and highs reaching 27°C (81°F). In contrast, April sees cooler conditions, featuring an average temperature of 10°C (49°F) and maximums of 23°C (74°F). Both months have relatively similar levels of precipitation, with September receiving 48 mm (1.9 in) over 9 days and April receiving 34 mm (1.3 in) over 8 days. Humidity levels are slightly higher in April at 85%, compared to September's 82%. To learn more about the specifics of April weather, visit Petworth weather in April.

In comparing the weather of September and May, we can see some notable differences. September typically experiences a wider range of temperatures, with a minimum of 3°C (37°F) and a maximum of 27°C (81°F), leading to an average temperature of 15°C (60°F). In contrast, May has a slightly cooler average temperature of 13°C (55°F), ranging from a minimum of 1°C (34°F) to a maximum of 25°C (77°F). Precipitation is also a factor, with September receiving 48 mm (1.9 in) over approximately 9 days, while May sees higher rainfall at 61 mm (2.4 in) across about 10 days. The humidity levels are quite similar, with September at 82% and May at 79%. For more detailed weather insights, you can check Petworth weather in May.

The weather in September is generally milder compared to June, with average temperatures hovering around 15°C (60°F) as opposed to June's 16°C (61°F). While both months experience a range of temperatures, September can see maximums of up to 27°C (81°F), whereas June peaks at 30°C (85°F). Precipitation is slightly higher in June at 72 mm (2.8 in) over 8 days, compared to September's 48 mm (1.9 in) over 9 days. Humidity levels are comparable, with September at 82% and June at 80%. For a closer look at June weather specifics, you can visit Petworth weather in June.

In comparing the weather of September and July, we notice distinct differences in temperature and humidity. September experiences a broader temperature range with minimums dropping to 3°C (37°F) and maximums reaching up to 27°C (81°F), averaging around 15°C (60°F). In contrast, July has milder nights with minimums at 9°C (48°F) and can reach temperatures as high as 32°C (90°F), with an average of 18°C (65°F). Interestingly, September has slightly less precipitation at 48 mm (1.9 in) over about 9 days, compared to July's 58 mm (2.3 in) over 10 days, even though it has higher humidity at 82% compared to July's 71%. For a more detailed look at July weather in a specific region, you can check Petworth weather in July.

In comparing the weather of September to August, September sees a noticeable drop in temperatures, with lows reaching 3°C (37°F) compared to August's minimum of 8°C (46°F). The average temperature in September is 15°C (60°F), while August maintains a warmer average of 17°C (64°F). Additionally, September experiences less precipitation, at 48 mm (1.9 in) over 9 days, compared to August's 66 mm (2.6 in) over 10 days. However, September's humidity is slightly higher at 82%, whereas August has a humidity level of 76%. For more details on August weather, you can visit Petworth weather in August.

September typically experiences warmer temperatures, with an average of 15°C (60°F) and maximums reaching 27°C (81°F). In contrast, October brings cooler conditions, with an average temperature of 12°C (54°F) and maximums of 21°C (70°F). Both months see significant precipitation, but October stands out with 90 mm (3.6 in) over 13 days, compared to September's 48 mm (1.9 in) over 9 days. Additionally, October has higher humidity levels at 90%, compared to September's 82%. For more detailed information about October's weather, you can check Petworth weather in October.

September's weather offers a milder climate with temperatures ranging from a minimum of 3°C (37°F) to a maximum of 27°C (81°F) and an average of 15°C (60°F). The month sees relatively low precipitation of 48 mm (1.9 in) over about 9 days and maintains a humidity level of 82%. In contrast, November brings colder conditions with minimum temperatures dropping to -1°C (30°F) and averaging at 8°C (47°F), peaking at 16°C (62°F). The month experiences higher precipitation at 63 mm (2.5 in) over approximately 12 days, along with increased humidity at 92%. For those interested in more details, you can find additional information here: Petworth weather in November.

September and December showcase stark differences in weather conditions. In September, temperatures range from a mild 3°C (37°F) at night to a pleasant maximum of 27°C (81°F) during the day, with an average of 15°C (60°F). The month experiences about 48 mm (1.9 in) of precipitation over 9 days, accompanied by a humidity level of 82%. In contrast, December brings a chillier atmosphere, with minimum temperatures dipping to -3°C (27°F) and a cooler daytime maximum of 14°C (58°F), averaging at 7°C (45°F). The month is much wetter, accumulating 94 mm (3.7 in) of precipitation over 15 days and a slightly higher humidity level of 92%. For more detailed information, you can check Petworth weather in December.

Compare Petworth's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Petworth

September in Petworth marks a transition in weather as summer gracefully gives way to autumn. With temperatures averaging a mild 15°C (60°F), there are still warm days to enjoy, but the evenings begin to carry a hint of chill. The month is characterized by increased humidity and moderate rainfall, totaling around 48 mm over several days, keeping the landscape lush and vibrant. Unlike the sweltering heat of summer, September offers a more temperate climate, inviting you to explore the picturesque surroundings. For those interested in understanding the annual weather patterns, visit Petworth Climate for more insights.