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September Weather in Portoviejo, Ecuador

Last updated: August 23, 2025

In September, the average temperature in Portoviejo, Ecuador hovers around 25°C (76°F), with minimums dipping to 19°C (66°F) and maximums soaring to 33°C (91°F). Expect a modest precipitation of 9 mm (0.3 in) over the course of 2 days, alongside a high average humidity of 89%.

September Temperature in Portoviejo

In September in Portoviejo, the average temperature is 25°C (76°F). Maximum temperatures can reach as high as 33°C (91°F), while minimums can drop to 19°C (66°F). This pleasant climate makes it an ideal time for outdoor adventures and sightseeing.

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

The chart illustrates September temperature patterns in Portoviejo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Portoviejo, September typically has an average temperature of 25°C (76°F), with highs reaching up to 33°C (91°F) and lows dropping to around 19°C (66°F).
JanFebMarAprMayJunJulAugSepOctNovDec797980807978777676767778
Data source: Temperature data for Portoviejo 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 Portoviejo

In Portoviejo in September, the precipitation amount is 9 mm (0.3 in) over a period of 2 days.

September Precipitation Trends in Portoviejo

The chart displays monthly precipitation patterns in Portoviejo, 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 Portoviejo, September typically receives around 9 mm (0.3 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec981902331157221889141052
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Portoviejo

In Portoviejo in September humidity is 89%. With an average temperature of 25°C (76°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities feel sticky and exhausting, while also amplifying the discomfort of heat, so it's best to stay hydrated and seek shade whenever possible.

September Average Humidity in Portoviejo

This chart illustrates the average monthly humidity levels in Portoviejo, 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 Portoviejo is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%90%90%89%89%90%89%87%89%90%90%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Portoviejo

In Portoviejo 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 Portoviejo.

Maximum UV Index Levels in Portoviejo for September

The chart shows the monthly maximum UV Index (UVI) for Portoviejo 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 Portoviejo typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141415151311111213131211
Data source: Portoviejo 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 Portoviejo Compares to Other Months

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

This table compares monthly weather conditions in Portoviejo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (80°F)98 mm (3.9 inches)91%extreme
February Weather26°C (80°F)190 mm (7.5 inches)90%extreme
March Weather26°C (80°F)233 mm (9.2 inches)90%extreme
April Weather27°C (80°F)115 mm (4.5 inches)89%extreme
May Weather26°C (79°F)72 mm (2.8 inches)89%extreme
June Weather25°C (78°F)21 mm (0.8 inches)90%extreme
July Weather25°C (77°F)8 mm (0.3 inches)89%extreme
August Weather24°C (76°F)8 mm (0.3 inches)87%extreme
September Weather25°C (76°F)9 mm (0.3 inches)89%extreme
October Weather25°C (76°F)14 mm (0.5 inches)90%extreme
November Weather25°C (77°F)10 mm (0.4 inches)90%extreme
December Weather26°C (78°F)52 mm (2.0 inches)90%extreme

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