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July Weather in San Marcos, Peru

Last updated: August 27, 2025

In San Marcos, Peru, the average temperature in July is a brisk 4°C (39°F), with minimums dipping as low as -7°C (20°F) and maximums reaching up to 15°C (59°F). Expect 41 mm (1.6 in) of precipitation over 12 days, while the atmosphere maintains an average humidity of 44%. Perfect for enjoying the distinctive seasonal charm!

July Temperature in San Marcos

In July in San Marcos, the average temperature is 4°C (39°F). Maximum temperatures can reach 15°C (59°F), while the minimum can drop as low as -7°C (20°F). Be prepared for chilly weather and pack accordingly if you plan to travel during this time.

July Weather in San Marcos: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in San Marcos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Marcos, July typically has an average temperature of 4°C (39°F), with highs reaching up to 15°C (59°F) and lows dropping to around -7°C (20°F).
JanFebMarAprMayJunJulAugSepOctNovDec414241414140393940414242
Data source: Temperature data for San Marcos 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.

July Precipitation in San Marcos

In San Marcos in July, the precipitation amount is 41 mm (1.6 in) over the course of 12 days.

July Precipitation Trends in San Marcos

The chart displays monthly precipitation patterns in San Marcos, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In San Marcos, July typically receives around 41 mm (1.6 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec209224272159101514155114179194232
Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.
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July Humidity in San Marcos

In San Marcos in July humidity is 44%. With an average temperature of 4°C (39°F), this humidity feels like a crisp, brisk chill, making it essential to layer up for traveling, as the dampness in the air can seep into your clothes and create a biting sensation on your skin.

July Average Humidity in San Marcos

This chart illustrates the average monthly humidity levels in San Marcos, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in San Marcos is approximately 44%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%86%89%89%86%71%44%34%37%50%73%91%
Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in San Marcos

In San Marcos in July, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in San Marcos.

Maximum UV Index Levels in San Marcos for July

The chart shows the monthly maximum UV Index (UVI) for San Marcos in July, 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 July, the maximum UV index in San Marcos typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec212021191613151519191819
Data source: San Marcos July 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 July Weather in San Marcos Compares to Other Months

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

This table compares monthly weather conditions in San Marcos, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)209 mm (8.2 inches)88%extreme
February Weather6°C (42°F)224 mm (8.8 inches)86%extreme
March Weather5°C (42°F)272 mm (10.7 inches)89%extreme
April Weather5°C (42°F)159 mm (6.2 inches)89%extreme
May Weather5°C (41°F)101 mm (4.0 inches)86%extreme
June Weather5°C (41°F)51 mm (2.0 inches)71%extreme
July Weather4°C (39°F)41 mm (1.6 inches)44%extreme
August Weather4°C (40°F)55 mm (2.2 inches)34%extreme
September Weather4°C (40°F)114 mm (4.5 inches)37%extreme
October Weather5°C (41°F)179 mm (7.0 inches)50%extreme
November Weather6°C (42°F)194 mm (7.6 inches)73%extreme
December Weather6°C (42°F)232 mm (9.1 inches)91%extreme

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