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September Weather in Yen Lac, Vietnam

Last updated: August 28, 2025

In September, the average temperature in Yen Lac, Vietnam is a warm 29°C (84°F), with minimums dipping to 22°C (72°F) and maximums soaring up to 37°C (98°F). This tropical climate brings an average precipitation of 204 mm (8.0 in) spread across 22 days, resulting in a humidity level of 82% that adds to the steamy atmosphere.

September Temperature in Yen Lac

In September in Yen Lac, the average temperature is 29°C (84°F), with maximums reaching up to 37°C (98°F) and minimums dipping to as low as 22°C (72°F). This makes it an ideal time for travelers seeking warm weather and plenty of sunshine.

September Weather in Yen Lac: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Yen Lac, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yen Lac, September typically has an average temperature of 29°C (84°F), with highs reaching up to 37°C (98°F) and lows dropping to around 22°C (72°F).
JanFebMarAprMayJunJulAugSepOctNovDec656673778387868583787365
Data source: Temperature data for Yen Lac 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 Yen Lac

In Yen Lac in September, the total precipitation amount reaches 204 mm (8.0 in) over the course of 22 days.

September Precipitation Trends in Yen Lac

The chart displays monthly precipitation patterns in Yen Lac, 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 Yen Lac, September typically receives around 204 mm (8.0 inches) of precipitation spread over approximately 22 days.
JanFebMarAprMayJunJulAugSepOctNovDec5236631241461772373772042264040
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Yen Lac

In Yen Lac in September humidity is 82%. With an average temperature of 29°C (84°F), this humidity feels like a heavy blanket wrapping around you, making sightseeing ventures feel more exhausting and requiring frequent breaks to stay hydrated.

September Average Humidity in Yen Lac

This chart illustrates the average monthly humidity levels in Yen Lac, 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 Yen Lac is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec66%71%69%64%73%81%90%89%82%77%72%71%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Yen Lac

In Yen Lac in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Yen Lac.

Maximum UV Index Levels in Yen Lac for September

The chart shows the monthly maximum UV Index (UVI) for Yen Lac 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 Yen Lac typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec810121213121213131197
Data source: Yen Lac 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 Yen Lac Compares to Other Months

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

This table compares monthly weather conditions in Yen Lac, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather18°C (65°F)52 mm (2.0 inches)66%very high
February Weather19°C (66°F)36 mm (1.4 inches)71%very high
March Weather23°C (73°F)62 mm (2.5 inches)69%extreme
April Weather25°C (77°F)124 mm (4.9 inches)64%extreme
May Weather28°C (83°F)146 mm (5.8 inches)73%extreme
June Weather31°C (87°F)177 mm (7.0 inches)81%extreme
July Weather30°C (86°F)237 mm (9.3 inches)90%extreme
August Weather29°C (85°F)377 mm (14.9 inches)89%extreme
September Weather29°C (84°F)204 mm (8.0 inches)82%extreme
October Weather25°C (78°F)226 mm (8.9 inches)77%extreme
November Weather23°C (73°F)40 mm (1.6 inches)72%very high
December Weather19°C (66°F)40 mm (1.6 inches)71%high

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