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September Weather in Bacnotan, Philippines

Last updated: August 27, 2025

In September, the average temperature in Bacnotan, Philippines hovers around 28°C (82°F), providing a warm climate perfect for summer activities. Expect temperatures to range from a cool 25°C (77°F) to a sizzling 31°C (88°F). However, be prepared for a wet month, as precipitation can reach 340 mm (13.4 in) over 26 days, coupled with a high average humidity of 87%.

September Temperature in Bacnotan

In September in Bacnotan, the average temperature is 28°C (82°F), with maximums reaching up to 31°C (88°F) and minimums dipping as low as 25°C (77°F). This warm climate makes Bacnotan an ideal destination for travelers seeking pleasant weather.

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

The chart illustrates September temperature patterns in Bacnotan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bacnotan, September typically has an average temperature of 28°C (82°F), with highs reaching up to 31°C (88°F) and lows dropping to around 25°C (77°F).
JanFebMarAprMayJunJulAugSepOctNovDec797981828484828282828280
Data source: Temperature data for Bacnotan 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 Bacnotan

In Bacnotan in September, the precipitation amount is 340 mm (13.4 in) spread over a period of 26 days.

September Precipitation Trends in Bacnotan

The chart displays monthly precipitation patterns in Bacnotan, 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 Bacnotan, September typically receives around 340 mm (13.4 inches) of precipitation spread over approximately 26 days.
JanFebMarAprMayJunJulAugSepOctNovDec107773450177343594675340233149105
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Bacnotan

In Bacnotan in September humidity is 87%. With an average temperature of 28°C (82°F), this humidity feels like a warm, thick blanket wrapping around you, making travel challenging as you navigate the air's heavy moisture.

September Average Humidity in Bacnotan

This chart illustrates the average monthly humidity levels in Bacnotan, 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 Bacnotan is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec77%73%71%73%77%85%86%87%87%86%89%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bacnotan

In Bacnotan 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 Bacnotan, you can check here.

Maximum UV Index Levels in Bacnotan for September

The chart shows the monthly maximum UV Index (UVI) for Bacnotan 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 Bacnotan typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec111314151314141414131110
Data source: Bacnotan 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 Bacnotan Compares to Other Months

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

This table compares monthly weather conditions in Bacnotan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (79°F)107 mm (4.2 inches)77%extreme
February Weather26°C (79°F)77 mm (3.0 inches)73%extreme
March Weather27°C (81°F)34 mm (1.3 inches)71%extreme
April Weather28°C (83°F)50 mm (2.0 inches)73%extreme
May Weather29°C (84°F)177 mm (7.0 inches)77%extreme
June Weather29°C (84°F)343 mm (13.5 inches)85%extreme
July Weather28°C (83°F)594 mm (23.4 inches)86%extreme
August Weather28°C (82°F)675 mm (26.6 inches)87%extreme
September Weather28°C (82°F)340 mm (13.4 inches)87%extreme
October Weather28°C (83°F)233 mm (9.2 inches)86%extreme
November Weather28°C (82°F)149 mm (5.9 inches)89%extreme
December Weather27°C (81°F)105 mm (4.1 inches)85%very high

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