Last updated: August 27, 2025
In September, the island of San Rafael, Mexico offers a warm embrace with an average temperature of 28°C (83°F). However, be prepared for a range, as temperatures can dip to a minimum of 23°C (73°F) and peak at a sizzling 36°C (96°F). Expect 82 mm (3.2 in) of precipitation spread over 17 days, contributing to an average humidity level of 75%. Plan your activities accordingly to enjoy the vibrant atmosphere!
In September in San Rafael, the average temperature is 28°C (83°F). Maximums can reach 36°C (96°F), while minimums can drop to as low as 23°C (73°F). This warm climate makes San Rafael an ideal destination for travelers seeking sunny weather and outdoor activities.
In San Rafael in September, the precipitation amount is 82 mm (3.2 in) over the course of 17 days.
In San Rafael in September humidity is 75%. With an average temperature of 28°C (83°F), this humidity feels like a warm blanket enveloping you, making outdoor activities feel particularly heavy, and prompting frequent breaks in the shade to stay comfortable while traveling.
In San Rafael 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 Rafael.
UV Risk Categories
Weather in San Rafael varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in San Rafael, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 23°C (75°F) | 20 mm (0.8 inches) | 79% | very high |
| February Weather | 25°C (78°F) | 8 mm (0.3 inches) | 80% | very high |
| March Weather | 26°C (80°F) | 3 mm (0.1 inches) | 76% | extreme |
| April Weather | 28°C (83°F) | 15 mm (0.6 inches) | 74% | extreme |
| May Weather | 29°C (85°F) | 32 mm (1.3 inches) | 72% | extreme |
| June Weather | 28°C (83°F) | 154 mm (6.1 inches) | 73% | extreme |
| July Weather | 29°C (84°F) | 55 mm (2.1 inches) | 77% | extreme |
| August Weather | 28°C (83°F) | 85 mm (3.4 inches) | 77% | extreme |
| September Weather | 28°C (83°F) | 82 mm (3.2 inches) | 75% | extreme |
| October Weather | 27°C (82°F) | 109 mm (4.3 inches) | 76% | extreme |
| November Weather | 25°C (78°F) | 26 mm (1.0 inches) | 81% | very high |
| December Weather | 24°C (76°F) | 16 mm (0.6 inches) | 84% | high |