Last updated: August 23, 2025
In August, the average temperature in San Luis, Guatemala is a warm 27°C (80°F). Expect lows of 21°C (69°F) and highs reaching up to 38°C (101°F). Be prepared for some wet days, as 138 mm (5.4 in) of precipitation typically falls over 24 days. The air tends to be quite humid as well, with an average humidity of 73%.
In August in San Luis, the average temperature is 27°C (80°F). Maximums can reach 38°C (101°F) and minimums can be as low as 21°C (69°F). This climate makes it a great destination for travelers looking to enjoy warm weather.
In San Luis in August, the precipitation amount is 138 mm (5.4 in) over a span of 24 days.
In San Luis in August humidity is 73%. With an average temperature of 27°C (80°F), this humidity feels like a warm, enveloping blanket that can make traveling feel sticky and slightly uncomfortable, prompting frequent breaks in the shade and plenty of hydration.
In San Luis in August, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For 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 August’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 |