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September Weather in Lima, United States

Last updated: June 24, 2025

In September, the average temperature in Lima, United States is a pleasant 18°C (65°F), with daily variations ranging from a chilly 3°C (38°F) to a warm 33°C (92°F). Expect 73 mm (2.9 in) of precipitation over 8 days, contributing to a relatively high average humidity of 76%. Prepare for a climate that blends warmth with refreshing moisture!

September Temperature in Lima

In September in Lima, the average temperature is 18°C (65°F). Maximum temperatures can reach 33°C (92°F), while minimums can drop as low as 3°C (38°F). This diverse temperature range makes Lima an interesting destination for travelers seeking both warm days and cooler nights.

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

The chart illustrates September temperature patterns in Lima, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lima, September typically has an average temperature of 18°C (65°F), with highs reaching up to 33°C (92°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec272935465868737165544032
Data source: Temperature data for Lima 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 Lima

In Lima in September, the precipitation amount is 73 mm (2.9 in) over a span of 8 days.

September Precipitation Trends in Lima

The chart displays monthly precipitation patterns in Lima, 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 Lima, September typically receives around 73 mm (2.9 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec7679731121098314096731408485
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Lima

In Lima in September, humidity is 76%. With an average temperature of 18°C (65°F), this humidity feels like a warm embrace, making travel a little sticky but enjoyable, as long as you stay hydrated and take breaks in the shade.

September Average Humidity in Lima

This chart illustrates the average monthly humidity levels in Lima, 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 Lima is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%91%88%88%82%80%77%72%76%83%88%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Lima

In Lima in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Lima.

Maximum UV Index Levels in Lima for September

The chart shows the monthly maximum UV Index (UVI) for Lima 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 Lima typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24581010997532
Data source: Lima 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 Lima Compares to Other Months

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

This table compares monthly weather conditions in Lima, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)76 mm (3.0 inches)91%low
February Weather-2°C (29°F)79 mm (3.1 inches)91%moderate
March Weather2°C (35°F)73 mm (2.9 inches)88%moderate
April Weather8°C (46°F)112 mm (4.4 inches)88%very high
May Weather15°C (59°F)109 mm (4.3 inches)82%very high
June Weather20°C (68°F)83 mm (3.3 inches)79%very high
July Weather23°C (73°F)140 mm (5.5 inches)77%very high
August Weather22°C (71°F)95 mm (3.8 inches)72%very high
September Weather18°C (65°F)73 mm (2.9 inches)76%high
October Weather12°C (54°F)140 mm (5.5 inches)83%moderate
November Weather4°C (40°F)84 mm (3.3 inches)88%moderate
December Weather0°C (32°F)85 mm (3.3 inches)87%low

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