Last updated: August 27, 2025
In Cinco de Mayo, Mexico, the average temperature in September hovers around 20°C (67°F), with minimums of 10°C (51°F) and peak averages reaching 30°C (87°F). Expect a precipitation amount of 121 mm (4.8 in) spread across 19 days, contributing to a muggy average humidity of 86%. Stay prepared for a blend of warmth and moisture!
In September in Cinco de Mayo, the average temperature is 20°C (67°F). Maximums can reach 30°C (87°F), and minimums can be as low as 10°C (51°F). This mild climate makes Cinco de Mayo an ideal destination for travelers looking to enjoy pleasant weather while exploring.
In Cinco de Mayo in September, the precipitation amount is 121 mm (4.8 in) spread over 19 days.
In Cinco de Mayo in September, humidity is 86%. With an average temperature of 20°C (67°F), this humidity feels like a warm blanket wrapping around you, making travel feel sticky and heavy; it's advisable to stay hydrated and take frequent breaks in the shade.
In Cinco de Mayo 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 Cinco de Mayo.
UV Risk Categories
Weather in Cinco de Mayo varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Cinco de Mayo, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 12°C (54°F) | 12 mm (0.5 inches) | 71% | very high |
| February Weather | 15°C (58°F) | 11 mm (0.4 inches) | 64% | extreme |
| March Weather | 18°C (64°F) | 4 mm (0.2 inches) | 49% | extreme |
| April Weather | 20°C (69°F) | 2 mm (0.1 inches) | 47% | extreme |
| May Weather | 23°C (73°F) | 8 mm (0.3 inches) | 55% | extreme |
| June Weather | 24°C (75°F) | 36 mm (1.4 inches) | 77% | extreme |
| July Weather | 21°C (71°F) | 108 mm (4.3 inches) | 82% | extreme |
| August Weather | 22°C (71°F) | 81 mm (3.2 inches) | 83% | extreme |
| September Weather | 20°C (67°F) | 121 mm (4.8 inches) | 86% | extreme |
| October Weather | 19°C (66°F) | 53 mm (2.1 inches) | 83% | extreme |
| November Weather | 16°C (61°F) | 13 mm (0.5 inches) | 80% | very high |
| December Weather | 13°C (55°F) | 9 mm (0.4 inches) | 83% | high |