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September Weather in Metapan, El Salvador

Last updated: August 23, 2025

In September, the average temperature in Metapan, El Salvador is a warm 26°C (79°F). You can expect mild evenings with a minimum temperature of 20°C (67°F), while daytime highs can soar to a sweltering 37°C (99°F). However, be prepared for some rain, with an average precipitation of 146 mm (5.7 in) spread over 22 days, and a humidity level sitting at approximately 71%.

September Temperature in Metapan

In September in Metapan, the average temperature is 26°C (79°F). Maximums can reach 37°C (99°F) and minimums can drop to as low as 20°C (67°F). This makes it an ideal time for travelers seeking warm weather and plenty of sunshine.

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

The chart illustrates September temperature patterns in Metapan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Metapan, September typically has an average temperature of 26°C (79°F), with highs reaching up to 37°C (99°F) and lows dropping to around 20°C (67°F).
JanFebMarAprMayJunJulAugSepOctNovDec757779818078807979777675
Data source: Temperature data for Metapan 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 Metapan

In Metapan in September, the total precipitation amount is 146 mm (5.7 in) spread over 22 days.

September Precipitation Trends in Metapan

The chart displays monthly precipitation patterns in Metapan, 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 Metapan, September typically receives around 146 mm (5.7 inches) of precipitation spread over approximately 22 days.
JanFebMarAprMayJunJulAugSepOctNovDec121151281355687146134353
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Metapan

In Metapan in September, humidity is 71%. With an average temperature of 26°C (79°F), this humidity feels like a heavy blanket wrapping around you, making travel somewhat stifling but offering a tropical ambiance that can be both invigorating and exhausting at the same time.

September Average Humidity in Metapan

This chart illustrates the average monthly humidity levels in Metapan, 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 Metapan is approximately 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%72%61%53%51%52%58%63%71%79%79%74%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Metapan

In Metapan 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 Metapan.

Maximum UV Index Levels in Metapan for September

The chart shows the monthly maximum UV Index (UVI) for Metapan 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 Metapan typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec11131415141414141313109
Data source: Metapan 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 Metapan Compares to Other Months

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

This table compares monthly weather conditions in Metapan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (75°F)1 mm (0.0 inches)80%extreme
February Weather25°C (77°F)2 mm (0.1 inches)72%extreme
March Weather26°C (79°F)1 mm (0.0 inches)61%extreme
April Weather27°C (81°F)15 mm (0.6 inches)53%extreme
May Weather27°C (81°F)128 mm (5.0 inches)51%extreme
June Weather26°C (79°F)135 mm (5.3 inches)52%extreme
July Weather27°C (80°F)56 mm (2.2 inches)58%extreme
August Weather26°C (80°F)87 mm (3.4 inches)63%extreme
September Weather26°C (79°F)146 mm (5.7 inches)71%extreme
October Weather25°C (78°F)134 mm (5.3 inches)79%extreme
November Weather25°C (76°F)35 mm (1.4 inches)79%very high
December Weather24°C (75°F)3 mm (0.1 inches)74%very high

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