January Weather in San Alejo, El Salvador

Last updated: August 23, 2025

In January, the average temperature in San Alejo, El Salvador is a balmy 28°C (82°F), with minimums dipping to a comfortable 18°C (64°F) and maximums soaring to a sizzling 37°C (99°F). Expect a pretty dry month with only 1 mm (0.0 in) of precipitation over 0 days, and enjoy the pleasant atmosphere with an average humidity of 63%.

January Temperature in San Alejo

In January in San Alejo, the average temperature is 28°C (82°F). Maximums can reach 37°C (99°F), while minimums can be as low as 18°C (64°F). This makes San Alejo a perfect destination for travelers looking to enjoy warm weather and outdoor activities.

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

The chart illustrates January temperature patterns in San Alejo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Alejo, January typically has an average temperature of 28°C (82°F), with highs reaching up to 37°C (99°F) and lows dropping to around 18°C (64°F).

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

January Precipitation in San Alejo

In San Alejo in January, the precipitation amount is 1 mm (0.0 in) during a span of 0 days.

January Precipitation Trends in San Alejo

The chart displays monthly precipitation patterns in San Alejo, 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 Alejo, January typically receives around 1 mm (0.0 inches) of precipitation spread over approximately 0 days.

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

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Millimeters (mm) Inches (in)

January Humidity in San Alejo

In San Alejo in January humidity is 63%. With an average temperature of 28°C (82°F), this humidity feels like a warm, enveloping blanket, making outdoor exploration sticky yet exhilarating, requiring frequent breaks for hydration and a refreshing dip.

January Average Humidity in San Alejo

This chart illustrates the average monthly humidity levels in San Alejo, 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 Alejo is approximately 63%, 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 Alejo

In San Alejo in January, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in San Alejo.

Maximum UV Index Levels in San Alejo for January

The chart shows the monthly maximum UV Index (UVI) for San Alejo 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 Alejo typically reaches 11, which falls under the extreme exposure category.

Data source: San Alejo 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 Alejo Compares to Other Months

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

This table compares monthly weather conditions in San Alejo, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	28°C (82°F)	1 mm (0.0 inches)	63%	extreme
February Weather	29°C (84°F)	1 mm (0.0 inches)	62%	extreme
March Weather	30°C (86°F)	6 mm (0.2 inches)	59%	extreme
April Weather	30°C (86°F)	29 mm (1.1 inches)	59%	extreme
May Weather	29°C (84°F)	241 mm (9.5 inches)	59%	extreme
June Weather	28°C (82°F)	274 mm (10.8 inches)	68%	extreme
July Weather	29°C (84°F)	80 mm (3.1 inches)	77%	extreme
August Weather	28°C (83°F)	222 mm (8.7 inches)	79%	extreme
September Weather	27°C (82°F)	248 mm (9.8 inches)	77%	extreme
October Weather	27°C (80°F)	331 mm (13.0 inches)	77%	extreme
November Weather	27°C (80°F)	55 mm (2.2 inches)	75%	very high
December Weather	27°C (81°F)	3 mm (0.1 inches)	66%	very high