Last updated: August 23, 2025
In April, the average temperature in San Sebastian, Guatemala is a warm 28°C (83°F), providing a pleasant backdrop for outdoor activities. Temperatures can range from a minimum of 21°C (70°F) to a sweltering maximum of 37°C (99°F). With an average humidity of 57%, it’s important to stay hydrated during your adventures. Expect about 105 mm (4.1 in) of precipitation spread over 17 days, so a light rain jacket might come in handy! ☔️
In April in San Sebastian, the average temperature is 28°C (83°F), with maximums soaring to 37°C (99°F) and minimums dipping as low as 21°C (70°F). This makes it an ideal time for travelers seeking warm weather and plenty of sunshine.
In San Sebastian in April, the precipitation amount is 105 mm (4.1 in) over a period of 17 days.
In San Sebastian in April, humidity is 57%. With an average temperature of 28°C (83°F), this humidity feels like a warm embrace, creating a slightly sticky atmosphere that can leave travelers feeling a bit fatigued, but also pleasantly refreshed when surrounded by cool breezes or shaded areas.
In San Sebastian in April, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in San Sebastian, you can check here.
UV Risk Categories
Weather in San Sebastian varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in San Sebastian, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 26°C (79°F) | 24 mm (1.0 inches) | 76% | very high |
| February Weather | 27°C (81°F) | 18 mm (0.7 inches) | 68% | extreme |
| March Weather | 28°C (82°F) | 44 mm (1.7 inches) | 59% | extreme |
| April Weather | 28°C (83°F) | 105 mm (4.1 inches) | 57% | extreme |
| May Weather | 27°C (81°F) | 447 mm (17.6 inches) | 65% | extreme |
| June Weather | 27°C (80°F) | 373 mm (14.7 inches) | 66% | extreme |
| July Weather | 27°C (81°F) | 292 mm (11.5 inches) | 75% | extreme |
| August Weather | 27°C (80°F) | 362 mm (14.3 inches) | 82% | extreme |
| September Weather | 26°C (80°F) | 418 mm (16.5 inches) | 82% | extreme |
| October Weather | 26°C (79°F) | 378 mm (14.9 inches) | 83% | extreme |
| November Weather | 27°C (80°F) | 106 mm (4.2 inches) | 80% | very high |
| December Weather | 26°C (80°F) | 26 mm (1.0 inches) | 76% | very high |