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January Weather in San Jose, Mexico

Last updated: August 27, 2025

In January, the average temperature in San Jose, Mexico is a pleasant 24°C (75°F). Expect temperatures to range from a minimum of 14°C (57°F) to a sizzling maximum of 36°C (96°F). With 42 mm (1.6 in) of precipitation spread over 7 days, you might want to pack an umbrella! The average humidity hovers around 78%, adding a touch of tropical warmth to your visit.

January Temperature in San Jose

In January in San Jose, the average temperature is 24°C (75°F). Maximum temperatures can reach 36°C (96°F), while minimums can drop to as low as 14°C (57°F). This wide range makes it an ideal time for travelers to enjoy both warm days and cooler evenings.

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

The chart illustrates January temperature patterns in San Jose, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Jose, January typically has an average temperature of 24°C (75°F), with highs reaching up to 36°C (96°F) and lows dropping to around 14°C (57°F).
JanFebMarAprMayJunJulAugSepOctNovDec757881858884858483817775
Data source: Temperature data for San Jose 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 Jose

In San Jose in January, the total precipitation amount is 42 mm (1.6 in) accumulated over a span of 7 days.

January Precipitation Trends in San Jose

The chart displays monthly precipitation patterns in San Jose, 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 Jose, January typically receives around 42 mm (1.6 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec42211732742499014921925111849
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in San Jose

In San Jose in January humidity is 78%. With an average temperature of 24°C (75°F), this humidity feels like a warm blanket wrapping around you, making travel sticky and heavy but also inviting, as long as you're prepared with plenty of water and light clothing.

January Average Humidity in San Jose

This chart illustrates the average monthly humidity levels in San Jose, 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 Jose is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%73%64%61%60%59%64%76%80%82%83%84%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in San Jose

In San Jose in January, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in San Jose.

Maximum UV Index Levels in San Jose for January

The chart shows the monthly maximum UV Index (UVI) for San Jose 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 Jose typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911131313141313121198
Data source: San Jose 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 Jose Compares to Other Months

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

This table compares monthly weather conditions in San Jose, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (75°F)42 mm (1.6 inches)78%very high
February Weather26°C (78°F)21 mm (0.8 inches)73%extreme
March Weather27°C (82°F)17 mm (0.7 inches)64%extreme
April Weather29°C (85°F)32 mm (1.3 inches)61%extreme
May Weather31°C (88°F)74 mm (2.9 inches)59%extreme
June Weather29°C (84°F)249 mm (9.8 inches)59%extreme
July Weather29°C (85°F)90 mm (3.5 inches)64%extreme
August Weather29°C (84°F)149 mm (5.9 inches)76%extreme
September Weather28°C (83°F)219 mm (8.6 inches)80%extreme
October Weather27°C (81°F)251 mm (9.9 inches)82%extreme
November Weather25°C (78°F)118 mm (4.7 inches)83%very high
December Weather24°C (76°F)49 mm (1.9 inches)84%very high

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