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January Weather in San Antonio, Peru

Last updated: August 27, 2025

In January, the average temperature in San Antonio, Peru hovers around 25°C (78°F). Expect a comfortable minimum of 19°C (66°F), with highs reaching up to 36°C (97°F). It's a humid time of year, with an average humidity of 80% and a precipitation total of 181 mm (7.1 in) over approximately 20 days.

January Temperature in San Antonio

In January in San Antonio, the average temperature is 25°C (78°F). Maximums can reach 36°C (97°F), while minimums can drop to as low as 19°C (66°F). It's a great time for travelers to enjoy warm weather, making it perfect for outdoor activities and exploring the local sights.

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 25°C (78°F), with highs reaching up to 36°C (97°F) and lows dropping to around 19°C (66°F).
JanFebMarAprMayJunJulAugSepOctNovDec777776767676757779787878
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 181 mm (7.1 in) over a span of 20 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 181 mm (7.1 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec181171291235203121686066141206154
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 80%. With an average temperature of 25°C (78°F), this humidity feels like a warm blanket enveloping you, making every outdoor activity feel more strenuous and steaming, while also causing you to seek out shade and refreshment more frequently.

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 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%76%81%86%86%70%47%37%42%62%76%89%
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 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 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 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151617161312111314151414
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 Weather25°C (78°F)181 mm (7.1 inches)80%extreme
February Weather25°C (78°F)171 mm (6.7 inches)76%extreme
March Weather25°C (77°F)290 mm (11.4 inches)81%extreme
April Weather25°C (77°F)235 mm (9.3 inches)86%extreme
May Weather24°C (76°F)203 mm (8.0 inches)86%extreme
June Weather24°C (76°F)121 mm (4.8 inches)70%extreme
July Weather24°C (75°F)68 mm (2.7 inches)47%extreme
August Weather25°C (77°F)60 mm (2.4 inches)37%extreme
September Weather26°C (79°F)66 mm (2.6 inches)42%extreme
October Weather26°C (78°F)141 mm (5.6 inches)62%extreme
November Weather26°C (78°F)206 mm (8.1 inches)76%extreme
December Weather25°C (78°F)154 mm (6.1 inches)89%extreme

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