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July Weather in San Juan, Costa Rica

Last updated: August 23, 2025

In July, the average temperature in San Juan, Costa Rica hovers around 19°C (66°F). Expect a comfortable range, with minimums dipping to 15°C (59°F) and maximums peaking at 25°C (77°F). However, be prepared for the possibility of 266 mm (10.5 in) of precipitation over 28 days, contributing to an average humidity level of 85%. Happy planning!

July Temperature in San Juan

In July in San Juan, the average temperature is 19°C (66°F). The maximum can reach 25°C (77°F) and the minimum can be as low as 15°C (59°F). This pleasant climate makes it a great time to explore San Juan.

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

The chart illustrates July temperature patterns in San Juan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Juan, July typically has an average temperature of 19°C (66°F), with highs reaching up to 25°C (77°F) and lows dropping to around 15°C (59°F).
JanFebMarAprMayJunJulAugSepOctNovDec636364666666666666656564
Data source: Temperature data for San Juan 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 Juan

In San Juan in July, the precipitation amount is 266 mm (10.5 in) during a period of 28 days.

July Precipitation Trends in San Juan

The chart displays monthly precipitation patterns in San Juan, 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 Juan, July typically receives around 266 mm (10.5 inches) of precipitation spread over approximately 28 days.
JanFebMarAprMayJunJulAugSepOctNovDec934349113425341266304380517260156
Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.
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July Humidity in San Juan

In San Juan in July humidity is 85%. With an average temperature of 19°C (66°F), this humidity feels like a warm, sticky embrace that can make outdoor adventures feel more exhausting, as the air weighs heavy and every step can feel like a mini workout.

July Average Humidity in San Juan

This chart illustrates the average monthly humidity levels in San Juan, 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 Juan is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec68%68%66%67%69%84%85%82%81%80%80%73%
Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in San Juan

In San Juan in July, 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 San Juan, you can check here.

Maximum UV Index Levels in San Juan for July

The chart shows the monthly maximum UV Index (UVI) for San Juan 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 Juan typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec121415161414141414151211
Data source: San Juan 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 Juan Compares to Other Months

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

This table compares monthly weather conditions in San Juan, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather17°C (63°F)93 mm (3.7 inches)68%extreme
February Weather17°C (64°F)43 mm (1.7 inches)68%extreme
March Weather18°C (64°F)49 mm (1.9 inches)66%extreme
April Weather19°C (66°F)113 mm (4.4 inches)67%extreme
May Weather19°C (67°F)425 mm (16.7 inches)69%extreme
June Weather19°C (67°F)341 mm (13.4 inches)84%extreme
July Weather19°C (66°F)266 mm (10.5 inches)85%extreme
August Weather19°C (66°F)304 mm (12.0 inches)82%extreme
September Weather19°C (66°F)379 mm (14.9 inches)81%extreme
October Weather19°C (66°F)517 mm (20.4 inches)80%extreme
November Weather18°C (65°F)260 mm (10.3 inches)80%extreme
December Weather18°C (64°F)156 mm (6.1 inches)72%extreme

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