September Weather in Longhua, China

Last updated: August 21, 2025

In Longhua, China, September ushers in a warm and humid climate, with temperatures ranging from a minimum of 17°C (63°F) to a scorching maximum of 39°C (103°F), resulting in an average temperature of 24°C (76°F). This month typically experiences 141 mm (5.6 in) of rainfall spread over 17 days, contributing to an overall humidity level of 84%. Visitors should be prepared for a mix of heat and frequent rain, making lightweight clothing and an umbrella essential for navigating this vibrant region.

September Temperature in Longhua

As September arrives in Longhua, China, the weather starts to reflect the transition from the sweltering summer months to the cooler autumn season. With minimum temperatures averaging 17°C (63°F) and maximums reaching up to 39°C (103°F), the month remains warm, but noticeably less extreme than the peak heat of July and August. The average temperature settles comfortably at 24°C (76°F), providing a pleasant backdrop for outdoor activities. This decline in maximum temperatures signals a shift in the climate, hinting at the cooler days to come as October approaches, while still retaining a hint of summer's warmth. Overall, September in Longhua is characterized by its blend of lingering heat and the anticipation of the refreshing autumn air ahead.

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

The chart illustrates September temperature patterns in Longhua, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Longhua, September typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec485160677277848576655749
Data source: Temperature data for Longhua 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 Longhua

In September, Longhua experiences a notable precipitation total of 141 mm (5.6 in) across 17 days, making it one of the wetter months of the year. This rainfall, coupled with its steady presence throughout the month, reflects the lingering effects of the monsoon season as summer transitions into autumn. With August preceding it at 161 mm (6.3 in), September showcases a slight decline, yet maintains a robust amount, indicating the region’s propensity for persistent rainfalls during this time. The trend of increasing precipitation from earlier months culminates before a drop in October, emphasizing September as a critical period for replenishing local water sources before the drier season sets in.

September Precipitation Trends in Longhua

The chart displays monthly precipitation patterns in Longhua, 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. In Longhua, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec28316092137129142161141954431
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Longhua

September in Longhua, China, marks a subtle transition in humidity levels, with a noticeable decrease to 84% from the peak of 87% in August. The remnants of summer still linger, as the humidity remains relatively high, but this dip indicates the onset of autumn. This month’s humidity is lower than the summer highs but still exceeds the average levels seen earlier in the year, reflecting a gradual shift towards cooler and drier conditions. As the year progresses, humidity levels are expected to fluctuate, making September an interesting threshold in the annual climate cycle of Longhua.

September Average Humidity in Longhua

This chart illustrates the average monthly humidity levels in Longhua, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Longhua is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec72%76%80%77%82%85%85%87%84%81%86%81%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Longhua

In September, Longhua, China, experiences a very high UV Index of 9, indicating that sun exposure requires caution, with a burn time of just 15 minutes. This marks a slight decrease from the peak levels seen in the summer months of July and August, when the index reached 12. However, September still maintains strong UV exposure, following the trend of high levels throughout the warmer months from March to August, where values consistently ranged from 8 to 12. As we transition into autumn, both September and October hold steady at a UV Index of 9, reminding residents and visitors alike to be vigilant about sun protection. For more insights and updates on UV levels, visit Longhua UV Index.

Maximum UV Index Levels in Longhua for September

The chart shows the monthly maximum UV Index (UVI) for Longhua 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. In September, the maximum UV index in Longhua typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec56810111112129964
Data source: Longhua 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 Longhua

September in Longhua, China, brings a splendid transition as the summer sun begins to wane, offering 225 hours of sunlight. This marks a noticeable decrease from the sun-drenched peak of 314 hours in August. As the seasons shift, one can see a gradual decline in daylight hours through the months; the year kicked off with modest 100 hours in January, gradually intensifying until it peaks in mid-summer. Following the heights of July and August, September's warmth lingers a bit longer, serving as a pleasant reminder of summer's embrace before the cooler autumn months settle in. The overall trend illustrates a clear seasonal rhythm, where hours of sunshine rise steadily to a summer climax and gently recede, embracing Longhua in vibrant yet fleeting warmth.

Monthly Sunshine Duration in Longhua: September Highlighted

The September sunshine duration represents the total number of hours Longhua 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.
JanFebMarAprMayJunJulAugSepOctNovDec100h154h187h214h252h260h306h314h225h140h151h123h
Data source: Longhua September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Longhua During September

In Longhua, China, September offers a refreshing shift in weather patterns, showcasing the highest likelihood of sunny days at 38% among all months. This upward trend in sunshine is particularly notable when compared to the preceding summer months, which feature lower probabilities—July at 32% and August at 24%. As the heat of summer begins to wane, September's clear skies make it an inviting time for outdoor activities, with a notable increase in sunny weather paving the way for vibrant autumn hues. With the chances of sun peaking this month, it’s an ideal time for residents and visitors alike to soak in the warmth before the cooler days of October settle in.

Percentage of Sunny Days in September in Longhua

The chart illustrates the percentage of sunny days in Longhua 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 Longhua experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec35%30%29%15%18%12%32%24%38%19%25%23%
Data source: Longhua September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Longhua in September

In Longhua, China, the rhythm of daylight throughout the year paints a vivid picture of seasonal change. By September, daylight begins to retreat slightly, offering around 12 hours, a gentle transition from the long, sun-drenched days of summer. The progression from January's 10 hours to May's peak of 13 hours showcases a steady increase in sunlight, creating an inviting atmosphere for outdoor activities and growth. As summer fades, the duration begins to taper off again, signaling the approach of autumn. This natural ebb and flow not only highlights the beauty of each season but also encourages a balance between vibrant activity and restful reflection as the year turns.

Average Daylight Hours in Longhua for September

The chart illustrates the variation in daylight duration in Longhua throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 28m11h 8m11h 59m12h 52m13h 36m13h 58m13h 47m13h 8m12h 18m11h 25m10h 40m10h 17m
Data source: Longhua daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Longhua

As the summer wanes and autumn approaches in Longhua, China, September ushers in a subtle shift in the breeze, with an average wind speed of 1.9 m/s (4 mph)—the highest recorded for the year. This uptick is a notable increase from the lighter, more languid winds of the preceding summer months, which hovered around the 1.4 to 1.6 m/s (3-4 mph) range. As September unfolds, the refreshing gusts herald a transition, invigorating the atmosphere while hinting at the cooler days ahead. This pattern sets the stage for a delightful interplay of calm and breezy weather, making it a perfect time to enjoy the outdoor beauty of Longhua.

Average September Wind Speed in Longhua

The chart displays monthly wind speed patterns in Longhua, 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.
JanFebMarAprMayJunJulAugSepOctNovDec1.61.61.81.61.51.51.41.61.9 m/s1.61.41.4
Data source: Longhua September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Longhua Compares to Other Months

Weather in Longhua varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Longhua, focusing on differences in temperature, rainfall, humidity, and UV levels.

September and January showcase contrasting weather patterns. In September, temperatures range from a comfortable minimum of 17°C (63°F) to a scorching maximum of 39°C (103°F), with an average of 24°C (76°F). The month experiences substantial rainfall, totaling 141 mm (5.6 in) over 17 days, coupled with high humidity at 84%. In stark contrast, January features much cooler temperatures, with a minimum of -2°C (29°F), an average of 9°C (48°F), and a maximum of 17°C (63°F). Precipitation decreases significantly to just 28 mm (1.1 in) over 7 days, and humidity levels drop to 72%. For more details, check out Longhua weather in January.

September and February present contrasting weather patterns. In September, the temperatures soar with a minimum of 17°C (63°F) and highs reaching up to 39°C (103°F), while February experiences much cooler conditions with a minimum of 2°C (36°F) and maximums around 28°C (82°F). September is notably humid with an average of 84% and significant rainfall totaling 141 mm (5.6 in) over 17 days, whereas February is much drier, receiving just 31 mm (1.2 in) of rain across 7 days and a lower humidity level of 76%. For more details on February weather, you can check Longhua weather in February.

September and March exhibit contrasting weather patterns. In September, temperatures range significantly, with a minimum of 17°C (63°F) and a scorching maximum of 39°C (103°F), averaging around 24°C (76°F). The month is also characterized by high humidity at 84% and substantial rainfall, totaling 141 mm (5.6 in) over 17 days. In contrast, March offers a cooler climate, with temperatures spanning from a minimum of 7°C (45°F) to a maximum of 33°C (92°F), averaging 16°C (60°F). Rainfall is less intense in March, totaling 60 mm (2.4 in) over 13 days, and humidity is slightly lower at 80%. For more information on the specific weather in March, see Longhua weather in March.

In September, temperatures are typically warmer, with minimums around 17°C (63°F) and maximums reaching up to 39°C (103°F), resulting in an average of 24°C (76°F). The month experiences higher humidity at 84% and sees significant rainfall, totaling 141 mm (5.6 in) over 17 days. In contrast, April offers cooler temperatures, with minimums of 9°C (48°F) and averages of 19°C (67°F), while maximums can reach 37°C (99°F). Precipitation in April is lower at 92 mm (3.6 in), occurring over 14 days, and the humidity is slightly less at 77%. For more detailed insight, visit Longhua weather in April.

In September, the weather is typically warmer than in May, with average temperatures reaching 24°C (76°F) compared to May's average of 22°C (73°F). September also sees higher maximum temperatures, soaring up to 39°C (103°F), while May peaks at 37°C (99°F). Despite these warmer temperatures, both months experience similar levels of precipitation, with September receiving 141 mm (5.6 in) over 17 days and May slightly less at 137 mm (5.4 in) over 18 days. Humidity levels are comparable too, with September at 84% and May at 82%. For a more detailed look at May weather, you can visit Longhua weather in May.

Comparing the weather in September and June, we see some notable similarities and differences. Both months experience a minimum temperature of 17°C (63°F); however, June tends to be slightly warmer on average, with an average temperature of 25°C (78°F) compared to September's 24°C (76°F). The maximum temperatures are also comparable, with June reaching 37°C (98°F) and September peaking at 39°C (103°F). When it comes to precipitation, September is slightly wetter, receiving 141 mm (5.6 in) over 17 days, while June has 129 mm (5.1 in) over the same number of days. Humidity levels are quite similar, with September at 84% and June at 85%. For a detailed look at June weather specifically, you can check out Longhua weather in June.

In comparing September and July weather, September exhibits slightly cooler temperatures, with a minimum of 17°C (63°F) and an average of 24°C (76°F), while July's minimum is higher at 21°C (70°F) and an average of 29°C (84°F). Both months experience similar maximum temperatures, with July reaching up to 40°C (105°F) and September peaking at 39°C (103°F). Precipitation levels are almost identical, with both months recording around 142 mm (5.6 in) over 17 days, and humidity remains consistently high at 84% for September and 85% for July. For more detailed information on July weather in Longhua, visit Longhua weather in July.

In comparing the weather of September and August, September experiences slightly cooler temperatures, with a minimum of 17°C (63°F) and an average of 24°C (76°F), while August sees higher temperatures with a minimum of 19°C (67°F) and an average of 30°C (85°F). The maximum temperatures in both months are relatively high, with August peaking at 41°C (106°F) compared to September's maximum of 39°C (103°F). Additionally, September has a notable increase in precipitation, with 141 mm (5.6 in) over 17 days, compared to August's 161 mm (6.3 in) across 14 days. Humidity levels remain quite high in both months, with September at 84% and August slightly higher at 87%. For a detailed look at August weather, you can visit Longhua weather in August.

In September, the weather tends to be warmer, with average temperatures around 24°C (76°F) and highs reaching up to 39°C (103°F). The month experiences significant rainfall, totaling 141 mm (5.6 in) over 17 days, accompanied by high humidity levels of 84%. In contrast, October sees a notable drop in temperatures, with averages around 18°C (66°F) and maximums of 37°C (98°F). Precipitation decreases to 95 mm (3.7 in) spread over 15 days, and humidity slightly lowers to 81%. For more details on the weather in October, you can check Longhua weather in October.

September and November weather shows a notable transition as the seasons change. In September, temperatures range significantly with a minimum of 17°C (63°F) and a maximum reaching up to 39°C (103°F), resulting in an average temperature of 24°C (76°F). The month also experiences considerable precipitation, totaling 141 mm (5.6 in) over 17 days, accompanied by high humidity at 84%. In contrast, November sees much cooler temperatures, with a minimum of 6°C (43°F) and a maximum of 26°C (78°F), leading to a lower average of 14°C (57°F). Precipitation decreases to 44 mm (1.7 in) spread across 10 days, and humidity remains relatively high at 86%. For further details on the weather patterns in November, you can check Longhua weather in November.

September and December showcase distinctly different weather patterns. In September, temperatures range from a mild 17°C (63°F) at night to a scorching high of 39°C (103°F) during the day, with an average temperature of 24°C (76°F). The month is marked by significant rainfall, accumulating to 141 mm (5.6 in) over 17 days, accompanied by high humidity levels of 84%. In contrast, December brings cooler temperatures, with a minimum of 2°C (35°F), an average of 10°C (50°F), and a maximum of 19°C (66°F). Precipitation decreases significantly, totaling just 31 mm (1.2 in) over 9 days, and humidity levels drop slightly to 81%. For a closer look at December weather, you can check Longhua weather in December.

Compare Longhua's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Longhua

As September unfolds in Longhua, the weather showcases a distinct shift from the sweltering summer months. The average temperature offers a welcome reprieve, hovering comfortably around 24°C (76°F), while the maximum heat can spike to a sizzling 39°C (103°F). This month brings a notable increase in humidity, often reaching 84%, contributing to a more tropical feel, particularly on those 17 days of rainfall that collectively pour down about 141 mm (5.6 in) of water. This blend of warmth and moisture sets September apart, creating a dynamic atmosphere that beckons both locals and visitors alike to embrace the seasonal transition. For further insights into the climate patterns throughout the year, check out Longhua Climate.