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September Weather in Phong Tho, Vietnam

Last updated: August 28, 2025

In September, the average temperature in Phong Tho, Vietnam is a pleasant 23°C (74°F). Expect a minimum of 14°C (58°F) and a maximum of 31°C (89°F), making it a comfortable time to explore. However, be prepared for some rain, as the area receives around 208 mm (8.2 in) of precipitation over 24 days, contributing to an average humidity of 81%. Enjoy the warm, humid ambiance!

September Temperature in Phong Tho

In September in Phong Tho, the average temperature is 23°C (74°F). The maximum can reach 31°C (89°F), and the minimum can be as low as 14°C (58°F). This mild climate makes it an ideal time for outdoor activities and exploration.

September Weather in Phong Tho: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Phong Tho, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Phong Tho, September typically has an average temperature of 23°C (74°F), with highs reaching up to 31°C (89°F) and lows dropping to around 14°C (58°F).
JanFebMarAprMayJunJulAugSepOctNovDec585965687374747573696458
Data source: Temperature data for Phong Tho 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 Phong Tho

In Phong Tho in September, the precipitation amount is 208 mm (8.2 in) over a span of 24 days.

September Precipitation Trends in Phong Tho

The chart displays monthly precipitation patterns in Phong Tho, 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 Phong Tho, September typically receives around 208 mm (8.2 inches) of precipitation spread over approximately 24 days.
JanFebMarAprMayJunJulAugSepOctNovDec85801532412103963944322081536771
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Phong Tho

In Phong Tho in September, humidity is 81%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket draped over your skin, making travel feel a bit more sluggish and requiring plenty of water breaks to stay comfortable.

September Average Humidity in Phong Tho

This chart illustrates the average monthly humidity levels in Phong Tho, 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 Phong Tho is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec57%67%58%53%69%83%90%90%81%75%74%69%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Phong Tho

In Phong Tho in September, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Phong Tho, you can check here.

Maximum UV Index Levels in Phong Tho for September

The chart shows the monthly maximum UV Index (UVI) for Phong Tho 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 Phong Tho typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec810121315141514141298
Data source: Phong Tho 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 Phong Tho Compares to Other Months

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

This table compares monthly weather conditions in Phong Tho, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather14°C (58°F)84 mm (3.3 inches)57%very high
February Weather15°C (59°F)80 mm (3.2 inches)67%very high
March Weather18°C (65°F)153 mm (6.0 inches)58%extreme
April Weather20°C (69°F)241 mm (9.5 inches)53%extreme
May Weather23°C (73°F)210 mm (8.3 inches)69%extreme
June Weather24°C (75°F)396 mm (15.6 inches)83%extreme
July Weather24°C (75°F)393 mm (15.5 inches)90%extreme
August Weather24°C (75°F)432 mm (17.0 inches)90%extreme
September Weather23°C (74°F)208 mm (8.2 inches)81%extreme
October Weather21°C (69°F)153 mm (6.0 inches)75%extreme
November Weather18°C (64°F)67 mm (2.7 inches)74%very high
December Weather14°C (58°F)71 mm (2.8 inches)69%very high

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