Last updated: August 27, 2025
In September, the average temperature in San Nicolas, Mexico hovers around 26°C (80°F), offering a warm escape. However, prepare for fluctuations, as temperatures can dip to a cool 17°C (62°F) and soar to a scorching 39°C (103°F). With an average precipitation of 126 mm (5.0 in) spread over 14 days, and a humidity level of 75%, be ready for some sultry, rainy days during your visit!
In September in San Nicolas, the average temperature is 26°C (80°F). The maximum can reach 39°C (103°F), while the minimum can drop to 17°C (62°F). Be prepared for warm weather and ensure you have suitable clothing for both hot and cooler moments during your travels.
In San Nicolas in September, the precipitation amount is 126 mm (5.0 in) over a span of 14 days.
In San Nicolas in September humidity is 75%. With an average temperature of 26°C (80°F), this humidity feels like a warm, muggy embrace, making travel a bit sticky and uncomfortable but also inviting you to slow down and savor the local culture in shaded cafes and breezy spots by the water.
In San Nicolas in September, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in San Nicolas.
UV Risk Categories
Weather in San Nicolas varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in San Nicolas, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 16°C (61°F) | 27 mm (1.1 inches) | 84% | high |
| February Weather | 18°C (65°F) | 23 mm (0.9 inches) | 83% | very high |
| March Weather | 21°C (71°F) | 52 mm (2.0 inches) | 78% | extreme |
| April Weather | 24°C (75°F) | 52 mm (2.1 inches) | 81% | extreme |
| May Weather | 27°C (80°F) | 78 mm (3.1 inches) | 82% | extreme |
| June Weather | 28°C (82°F) | 84 mm (3.3 inches) | 74% | extreme |
| July Weather | 28°C (83°F) | 106 mm (4.2 inches) | 68% | extreme |
| August Weather | 29°C (84°F) | 27 mm (1.1 inches) | 67% | extreme |
| September Weather | 26°C (80°F) | 126 mm (5.0 inches) | 75% | extreme |
| October Weather | 23°C (74°F) | 70 mm (2.7 inches) | 78% | very high |
| November Weather | 19°C (67°F) | 53 mm (2.1 inches) | 83% | very high |
| December Weather | 17°C (63°F) | 16 mm (0.6 inches) | 86% | high |