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September Weather in Helong, China

Last updated: August 22, 2025

In September, the average temperature in Helong, China hovers around 26°C (80°F), providing a warm atmosphere for visitors. Temperatures can range from a cool minimum of 15°C (59°F) to a sizzling maximum of 38°C (100°F), catering to all preferences. Expect about 95 mm (3.8 in) of precipitation over 12 days, accompanied by an average humidity of 61%, which adds a touch of tropical charm to your stay.

September Temperature in Helong

In September in Helong, the average temperature is 26°C (80°F), with maximums reaching 38°C (100°F) and minimums dipping as low as 15°C (59°F). This makes Helong an inviting destination for travelers seeking warm weather and pleasant conditions.

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

The chart illustrates September temperature patterns in Helong, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Helong, September typically has an average temperature of 26°C (80°F), with highs reaching up to 38°C (100°F) and lows dropping to around 15°C (59°F).
JanFebMarAprMayJunJulAugSepOctNovDec495260667479848380706151
Data source: Temperature data for Helong 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 Helong

In Helong in September, the precipitation amount is 95 mm (3.8 in) spread over 12 days.

September Precipitation Trends in Helong

The chart displays monthly precipitation patterns in Helong, 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 Helong, September typically receives around 95 mm (3.8 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec4510018218025131912316195437432
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Helong

In Helong in September, humidity is 61%. With an average temperature of 26°C (80°F), this humidity feels like a sweltering embrace, making outdoor activities a bit uncomfortable and requiring frequent breaks in the shade.

September Average Humidity in Helong

This chart illustrates the average monthly humidity levels in Helong, 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 Helong is approximately 61%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec66%70%77%76%85%80%87%84%61%62%67%74%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Helong

In Helong in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Helong.

Maximum UV Index Levels in Helong for September

The chart shows the monthly maximum UV Index (UVI) for Helong 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 Helong typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec79121113131313111086
Data source: Helong 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.

How September Weather in Helong Compares to Other Months

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

This table compares monthly weather conditions in Helong, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (50°F)45 mm (1.8 inches)66%high
February Weather11°C (52°F)100 mm (3.9 inches)70%very high
March Weather16°C (61°F)182 mm (7.2 inches)77%extreme
April Weather19°C (67°F)180 mm (7.1 inches)76%extreme
May Weather23°C (75°F)251 mm (9.9 inches)85%extreme
June Weather26°C (79°F)319 mm (12.6 inches)80%extreme
July Weather29°C (84°F)123 mm (4.8 inches)87%extreme
August Weather28°C (83°F)161 mm (6.3 inches)84%extreme
September Weather26°C (80°F)95 mm (3.8 inches)61%extreme
October Weather21°C (70°F)43 mm (1.7 inches)62%very high
November Weather16°C (61°F)74 mm (2.9 inches)67%very high
December Weather10°C (51°F)32 mm (1.3 inches)74%high

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