Last updated: August 23, 2025
In San Luis, Guatemala, the average temperature in January hovers around 22°C (72°F). Expect a comfortable range, with minimums dipping to 12°C (54°F) and maximums peaking at 32°C (90°F). However, be prepared for some rain, as 70 mm (2.8 in) of precipitation could fall over approximately 12 days. With an average humidity level of 85%, it’s a great time to enjoy the lush surroundings!
In January in San Luis, the average temperature is 22°C (72°F). Maximums can reach 32°C (90°F) and minimums can be as low as 12°C (54°F). This weather makes it an ideal time to explore outdoor activities while being prepared for both warm and cooler evenings.
In San Luis in January, the precipitation amount is 70 mm (2.8 in) over the course of 12 days.
In San Luis in January, humidity is 85%. With an average temperature of 22°C (72°F), this humidity feels like you're walking through a warm, dense fog, making every step slightly sticky and adding a layer of heaviness to the air that can be both suffocating and refreshing at the same time, definitely affecting your travel experience.
In San Luis in January, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in San Luis.
UV Risk Categories
Weather in San Luis varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in San Luis, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 22°C (72°F) | 70 mm (2.8 inches) | 85% | very high |
| February Weather | 23°C (74°F) | 45 mm (1.8 inches) | 78% | extreme |
| March Weather | 24°C (76°F) | 55 mm (2.2 inches) | 67% | extreme |
| April Weather | 27°C (81°F) | 54 mm (2.1 inches) | 62% | extreme |
| May Weather | 28°C (82°F) | 131 mm (5.2 inches) | 62% | extreme |
| June Weather | 27°C (81°F) | 204 mm (8.0 inches) | 63% | extreme |
| July Weather | 27°C (80°F) | 115 mm (4.5 inches) | 66% | extreme |
| August Weather | 27°C (80°F) | 138 mm (5.4 inches) | 73% | extreme |
| September Weather | 26°C (80°F) | 199 mm (7.8 inches) | 82% | extreme |
| October Weather | 25°C (78°F) | 267 mm (10.5 inches) | 86% | extreme |
| November Weather | 23°C (74°F) | 179 mm (7.1 inches) | 87% | very high |
| December Weather | 22°C (72°F) | 82 mm (3.2 inches) | 87% | very high |