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September Weather in Jonacapa, Mexico

Last updated: August 27, 2025

In September, the average temperature in Jonacapa, Mexico hovers around 18°C (65°F), with highs reaching up to 28°C (83°F) and chilling down to a low of 8°C (46°F). Expect a substantial precipitation amount of 145 mm (5.7 in) spread across 20 days, contributing to a high average humidity of 84%. Prepare for a lush and vibrant atmosphere during your visit!

September Temperature in Jonacapa

In September in Jonacapa, the average temperature is 18°C (65°F). Maximum temperatures can reach 28°C (83°F), while minimums can drop as low as 8°C (46°F). This pleasant climate makes Jonacapa an ideal destination for travelers looking to enjoy mild weather and outdoor activities.

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

The chart illustrates September temperature patterns in Jonacapa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jonacapa, September typically has an average temperature of 18°C (65°F), with highs reaching up to 28°C (83°F) and lows dropping to around 8°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec566164687067666664635957
Data source: Temperature data for Jonacapa 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 Jonacapa

In Jonacapa in September, the precipitation amount is 145 mm (5.7 in) over a span of 20 days.

September Precipitation Trends in Jonacapa

The chart displays monthly precipitation patterns in Jonacapa, 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 Jonacapa, September typically receives around 145 mm (5.7 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec101016285114411111814578255
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Jonacapa

In Jonacapa in September, humidity is 84%. With an average temperature of 18°C (65°F), this humidity feels like a thick blanket enveloping you, making travel feel heavy and slightly uncomfortable as the air clings to your skin and limits your breath.

September Average Humidity in Jonacapa

This chart illustrates the average monthly humidity levels in Jonacapa, 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 Jonacapa is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%86%83%80%82%79%72%74%84%92%91%91%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Jonacapa

In Jonacapa 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 Jonacapa, you can check here.

Maximum UV Index Levels in Jonacapa for September

The chart shows the monthly maximum UV Index (UVI) for Jonacapa 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 Jonacapa typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec9121415151414141412108
Data source: Jonacapa 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 Jonacapa Compares to Other Months

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

This table compares monthly weather conditions in Jonacapa, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather13°C (56°F)10 mm (0.4 inches)88%very high
February Weather16°C (61°F)10 mm (0.4 inches)86%extreme
March Weather18°C (64°F)16 mm (0.6 inches)83%extreme
April Weather20°C (68°F)28 mm (1.1 inches)80%extreme
May Weather21°C (70°F)51 mm (2.0 inches)82%extreme
June Weather19°C (67°F)144 mm (5.7 inches)79%extreme
July Weather19°C (66°F)111 mm (4.4 inches)72%extreme
August Weather19°C (66°F)118 mm (4.6 inches)74%extreme
September Weather18°C (65°F)145 mm (5.7 inches)84%extreme
October Weather17°C (63°F)78 mm (3.1 inches)92%extreme
November Weather15°C (59°F)25 mm (1.0 inches)91%very high
December Weather14°C (57°F)5 mm (0.2 inches)91%very high

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