Last updated: August 27, 2025
In San Juan de Cacazu, Peru, the average temperature in September is a pleasant 21°C (70°F). During this month, you can expect minimum temperatures to dip to 13°C (57°F), while the maximum can soar up to 31°C (88°F). With an average precipitation amount of 87 mm (3.4 in) over 14 days, and humidity levels hovering around 40%, you’ll want to prepare for a mix of sunny days and occasional showers!
In September in San Juan de Cacazu, the average temperature is 21°C (70°F), making it a pleasant time to visit. Maximum temperatures can reach 31°C (88°F), while the minimum can drop to 13°C (57°F), so it's advisable to pack both lightweight clothing and a light jacket for the cooler evenings.
In San Juan de Cacazu in September, the precipitation amount is 87 mm (3.4 in) over a span of 14 days.
In San Juan de Cacazu in September humidity is 40%. With an average temperature of 21°C (70°F), this humidity feels like a pleasant and comfortable backdrop for traveling, allowing for enjoyable outdoor activities without the discomfort of oppressive heat or heavy moisture in the air.
In San Juan de Cacazu in September, 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 Juan de Cacazu, you can check here.
UV Risk Categories
Weather in San Juan de Cacazu varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in San Juan de Cacazu, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 21°C (70°F) | 339 mm (13.4 inches) | 91% | extreme |
| February Weather | 21°C (70°F) | 375 mm (14.7 inches) | 90% | extreme |
| March Weather | 21°C (70°F) | 314 mm (12.4 inches) | 91% | extreme |
| April Weather | 21°C (70°F) | 228 mm (9.0 inches) | 89% | extreme |
| May Weather | 20°C (69°F) | 127 mm (5.0 inches) | 85% | extreme |
| June Weather | 20°C (69°F) | 90 mm (3.6 inches) | 65% | extreme |
| July Weather | 20°C (67°F) | 66 mm (2.6 inches) | 47% | extreme |
| August Weather | 20°C (68°F) | 75 mm (2.9 inches) | 38% | extreme |
| September Weather | 21°C (70°F) | 87 mm (3.4 inches) | 40% | extreme |
| October Weather | 21°C (70°F) | 158 mm (6.2 inches) | 56% | extreme |
| November Weather | 21°C (71°F) | 224 mm (8.8 inches) | 76% | extreme |
| December Weather | 21°C (70°F) | 304 mm (12.0 inches) | 90% | extreme |