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January Weather in San Antonio, Peru

Last updated: August 27, 2025

In January, the average temperature in San Antonio, Peru is a comfortable 18°C (64°F), with a minimum reaching 13°C (55°F) and a pleasant maximum of 25°C (78°F). Expect 83 mm (3.3 in) of precipitation spread over 16 days, and prepare for high humidity, averaging 89%.

January Temperature in San Antonio

In January in San Antonio, the average temperature is 18°C (64°F), with maximums reaching up to 25°C (78°F) and minimums dipping as low as 13°C (55°F). This moderate climate makes it an ideal time for exploring outdoor activities and enjoying the local attractions.

January Weather in San Antonio: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in San Antonio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Antonio, January typically has an average temperature of 18°C (64°F), with highs reaching up to 25°C (78°F) and lows dropping to around 13°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec646464646463636464656464
Data source: Temperature data for San Antonio 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.

January Precipitation in San Antonio

In San Antonio in January, the precipitation amount is 83 mm (3.3 in), occurring over a period of 16 days.

January Precipitation Trends in San Antonio

The chart displays monthly precipitation patterns in San Antonio, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In San Antonio, January typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec8389578001001413
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in San Antonio

In San Antonio in January, humidity is 89%. With an average temperature of 18°C (64°F), this humidity feels like a thick blanket enveloping you, making travel feel heavy and sluggish, as every step seems to weigh you down in the warm, muggy air.

January Average Humidity in San Antonio

This chart illustrates the average monthly humidity levels in San Antonio, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in San Antonio is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%90%90%91%88%76%61%57%59%75%84%84%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in San Antonio

In San Antonio in January, the maximum UV index is 16, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, making it crucial to take protective measures. For detailed information, you can refer to the Hourly UV Index in San Antonio.

Maximum UV Index Levels in San Antonio for January

The chart shows the monthly maximum UV Index (UVI) for San Antonio in January, 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 January, the maximum UV index in San Antonio typically reaches 16, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec16161514119101214161716
Data source: San Antonio January 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 January Weather in San Antonio Compares to Other Months

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

This table compares monthly weather conditions in San Antonio, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather18°C (64°F)83 mm (3.3 inches)89%extreme
February Weather18°C (64°F)89 mm (3.5 inches)90%extreme
March Weather18°C (64°F)57 mm (2.3 inches)90%extreme
April Weather18°C (65°F)8 mm (0.3 inches)91%extreme
May Weather18°C (65°F)0 mm (0.0 inches)88%extreme
June Weather17°C (63°F)0 mm (0.0 inches)76%very high
July Weather17°C (63°F)1 mm (0.0 inches)61%very high
August Weather18°C (64°F)0 mm (0.0 inches)57%extreme
September Weather18°C (65°F)0 mm (0.0 inches)58%extreme
October Weather18°C (65°F)1 mm (0.0 inches)75%extreme
November Weather18°C (64°F)4 mm (0.1 inches)83%extreme
December Weather18°C (65°F)13 mm (0.5 inches)84%extreme

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