Last updated: August 26, 2025
In September, the average temperature in San Juan (San Juan de Coyotillos), Mexico is a comfortable 19°C (67°F), with minimums dipping to 11°C (52°F) and highs reaching up to 30°C (86°F). Expect about 86 mm (3.4 in) of precipitation spread over 14 days, contributing to an average humidity of 81%. This delightful mix of warmth and moisture creates an inviting atmosphere for visitors!
In September in San Juan (San Juan de Coyotillos), the average temperature is 19°C (67°F). Maximums can reach 30°C (86°F), and minimums can drop as low as 11°C (52°F). This mild climate makes San Juan (San Juan de Coyotillos) an ideal destination for travelers seeking a pleasant getaway.
In San Juan (San Juan de Coyotillos) in September, the precipitation amount is 86 mm (3.4 in) over the course of 14 days.
In San Juan (San Juan de Coyotillos) in September humidity is 81%. With an average temperature of 19°C (67°F), this humidity feels like a heavy blanket enveloping you, making travel somewhat uncomfortable as sweat clings to your skin and the air feels thick, prompting you to seek shade and hydration frequently.
In San Juan (San Juan de Coyotillos) in September, 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 Juan (San Juan de Coyotillos).
UV Risk Categories
Weather in San Juan (San Juan de Coyotillos) varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in San Juan (San Juan de Coyotillos), focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 13°C (55°F) | 11 mm (0.4 inches) | 75% | very high |
| February Weather | 15°C (60°F) | 10 mm (0.4 inches) | 69% | extreme |
| March Weather | 18°C (65°F) | 14 mm (0.5 inches) | 65% | extreme |
| April Weather | 20°C (69°F) | 11 mm (0.4 inches) | 64% | extreme |
| May Weather | 22°C (72°F) | 40 mm (1.6 inches) | 75% | extreme |
| June Weather | 21°C (70°F) | 84 mm (3.3 inches) | 78% | extreme |
| July Weather | 20°C (69°F) | 69 mm (2.7 inches) | 67% | extreme |
| August Weather | 21°C (69°F) | 47 mm (1.9 inches) | 64% | extreme |
| September Weather | 19°C (67°F) | 86 mm (3.4 inches) | 81% | extreme |
| October Weather | 18°C (64°F) | 48 mm (1.9 inches) | 85% | extreme |
| November Weather | 15°C (60°F) | 16 mm (0.6 inches) | 87% | very high |
| December Weather | 13°C (56°F) | 9 mm (0.4 inches) | 87% | very high |