January Weather in San Jose, Belize

Last updated: August 22, 2025

In January, the average temperature in San Jose, Belize is a comfortable 24°C (75°F). However, it can dip to a cool 13°C (56°F) and rise as high as 34°C (94°F). This month sees a total precipitation of 55 mm (2.2 in) spread over 11 days. You'll also experience a high average humidity of 85%, making for a truly tropical feel.

January Temperature in San Jose

In January in San Jose, the average temperature is 24°C (75°F). Maximums can reach 34°C (94°F), and minimums can be as low as 13°C (56°F). This makes it an ideal time for travelers to enjoy a pleasant mix of warm and cool weather while exploring the area.

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 34°C (94°F) and lows dropping to around 13°C (56°F).

Data source: Temperature data for San Jose generated using information from the Copernicus Climate Change Service.

January Precipitation in San Jose

In San Jose, in January, the total precipitation amount is 55 mm (2.2 in) over the course of 11 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 55 mm (2.2 inches) of precipitation spread over approximately 11 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in San Jose

In San Jose in January humidity is 85%. With an average temperature of 24°C (75°F), this humidity feels like walking through a warm, heavy blanket, making travel feel sluggish and draining as you navigate through the thick, muggy air.

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 85%, offering insight into how humid the weather typically is during this month.

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.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	24°C (75°F)	55 mm (2.2 inches)	85%	very high
February Weather	26°C (78°F)	29 mm (1.2 inches)	80%	extreme
March Weather	27°C (80°F)	27 mm (1.1 inches)	69%	extreme
April Weather	28°C (83°F)	35 mm (1.4 inches)	64%	extreme
May Weather	29°C (84°F)	78 mm (3.1 inches)	63%	extreme
June Weather	28°C (83°F)	239 mm (9.4 inches)	62%	extreme
July Weather	28°C (83°F)	115 mm (4.5 inches)	65%	extreme
August Weather	28°C (84°F)	150 mm (5.9 inches)	78%	extreme
September Weather	28°C (83°F)	183 mm (7.2 inches)	85%	extreme
October Weather	27°C (81°F)	226 mm (8.9 inches)	87%	extreme
November Weather	25°C (78°F)	102 mm (4.0 inches)	88%	very high
December Weather	24°C (76°F)	53 mm (2.1 inches)	88%	very high