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January Weather in San Antonio, Peru

Last updated: August 27, 2025

In San Antonio, Peru, the average temperature in January hovers around 6°C (43°F). Expect conditions to vary with minimums dipping to -4°C (25°F) and maximums rising to 16°C (60°F). The region experiences a notable precipitation of 250 mm (9.8 in) spread over 25 days, creating an average humidity level of a high 89%. Prepare for a moist and cool climate!

January Temperature in San Antonio

In January in San Antonio, the average temperature is 6°C (43°F), with maximums reaching 16°C (60°F) and minimums dipping as low as -4°C (25°F). It's advisable to pack layers and a warm coat to comfortably enjoy your travels during this chilly season.

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 6°C (43°F), with highs reaching up to 16°C (60°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec434343424039404143434444
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 total precipitation amount is 250 mm (9.8 in) spread over 25 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 250 mm (9.8 inches) of precipitation spread over approximately 25 days.
JanFebMarAprMayJunJulAugSepOctNovDec2502972741274613152378153185252
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 6°C (43°F), this humidity feels like a chilly, damp embrace that can make outdoor activities uncomfortable and energy-draining, often leading travelers to seek shelter indoors or dress in layers to cope with the cold and moist 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%90%84%67%53%47%53%67%75%83%
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 reaches 24, which corresponds to the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take necessary precautions. For a detailed breakdown of the hourly UV index in San Antonio, you can refer to the hourly UV index here.

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 24, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec242524181412131517182023
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 Weather6°C (43°F)250 mm (9.8 inches)89%extreme
February Weather6°C (43°F)297 mm (11.7 inches)90%extreme
March Weather6°C (43°F)274 mm (10.8 inches)90%extreme
April Weather6°C (42°F)126 mm (5.0 inches)90%extreme
May Weather5°C (41°F)46 mm (1.8 inches)84%extreme
June Weather4°C (40°F)13 mm (0.5 inches)67%extreme
July Weather4°C (40°F)15 mm (0.6 inches)53%extreme
August Weather5°C (41°F)23 mm (0.9 inches)47%extreme
September Weather6°C (43°F)78 mm (3.1 inches)53%extreme
October Weather6°C (43°F)153 mm (6.0 inches)67%extreme
November Weather7°C (44°F)185 mm (7.3 inches)75%extreme
December Weather6°C (44°F)252 mm (9.9 inches)82%extreme

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