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September Weather in Yen Lac, Vietnam

Last updated: August 28, 2025

In Yen Lac, Vietnam, the average temperature in September is a warm 26°C (79°F). During this time, temperatures can range from a cool 18°C (64°F) to a scorching 35°C (95°F). Expect a total precipitation of 218 mm (8.6 in) spread over approximately 22 days, contributing to an average humidity of 76%. Stay prepared for both warmth and occasional showers!

September Temperature in Yen Lac

In September, in Yen Lac, the average temperature is 26°C (79°F). Maximums can reach 35°C (95°F), and minimums can be as low as 18°C (64°F). This makes Yen Lac an ideal destination for travelers seeking warm weather and comfortable conditions.

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 26°C (79°F), with highs reaching up to 35°C (95°F) and lows dropping to around 18°C (64°F).
JanFebMarAprMayJunJulAugSepOctNovDec586067717881818079726759
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 precipitation amount is 218 mm (8.6 in) spread over 22 days, indicating a considerable amount of rainfall for that period.

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 218 mm (8.6 inches) of precipitation spread over approximately 22 days.
JanFebMarAprMayJunJulAugSepOctNovDec64571041301812952613772181924546
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 76%. With an average temperature of 26°C (79°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities challenging and requiring frequent breaks to hydrate and cool down during your travels.

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 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec59%66%66%60%77%85%90%90%76%71%69%66%
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.
JanFebMarAprMayJunJulAugSepOctNovDec810121213131413131197
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 Weather15°C (59°F)64 mm (2.5 inches)59%very high
February Weather16°C (60°F)57 mm (2.3 inches)66%very high
March Weather20°C (67°F)104 mm (4.1 inches)66%extreme
April Weather22°C (72°F)130 mm (5.1 inches)60%extreme
May Weather25°C (78°F)180 mm (7.1 inches)77%extreme
June Weather27°C (81°F)294 mm (11.6 inches)85%extreme
July Weather27°C (81°F)261 mm (10.3 inches)90%extreme
August Weather27°C (80°F)377 mm (14.9 inches)90%extreme
September Weather26°C (79°F)218 mm (8.6 inches)76%extreme
October Weather22°C (72°F)192 mm (7.5 inches)71%extreme
November Weather19°C (67°F)45 mm (1.8 inches)69%very high
December Weather15°C (59°F)46 mm (1.8 inches)66%high

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