Last updated: August 27, 2025
In Colonia San Francisco (San Francisco), Mexico, the average temperature in September hovers around 18°C (65°F), with a minimum dipping to 8°C (47°F) and a maximum reaching 28°C (82°F). Expect 136 mm (5.3 in) of precipitation spread across about 15 days, accompanied by an average humidity level of 81%. Stay prepared for a mix of warmth and moisture this month!
In September in Colonia San Francisco (San Francisco), the average temperature is 18°C (65°F), with maximums reaching 28°C (82°F) and minimums dipping as low as 8°C (47°F). This mild weather makes it an ideal time for travelers to explore and enjoy outdoor activities.
In Colonia San Francisco (San Francisco) in September, the precipitation amount is 136 mm (5.3 in) over a span of 15 days.
In Colonia San Francisco (San Francisco) in September, humidity is 81%. With an average temperature of 18°C (65°F), this humidity feels like a thick blanket wrapping around you, making every step feel heavier and the air thick and sultry—a challenging environment for traveling.
In Colonia San Francisco (San Francisco) 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 Colonia San Francisco (San Francisco), you can check here.
UV Risk Categories
Weather in Colonia San Francisco (San Francisco) varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Colonia San Francisco (San Francisco), 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) | 75% | very high |
| February Weather | 15°C (59°F) | 9 mm (0.4 inches) | 69% | extreme |
| March Weather | 17°C (64°F) | 9 mm (0.4 inches) | 65% | extreme |
| April Weather | 19°C (67°F) | 5 mm (0.2 inches) | 64% | extreme |
| May Weather | 21°C (70°F) | 33 mm (1.3 inches) | 75% | extreme |
| June Weather | 20°C (69°F) | 119 mm (4.7 inches) | 78% | extreme |
| July Weather | 19°C (67°F) | 108 mm (4.2 inches) | 67% | extreme |
| August Weather | 19°C (67°F) | 78 mm (3.1 inches) | 64% | extreme |
| September Weather | 18°C (65°F) | 136 mm (5.3 inches) | 81% | extreme |
| October Weather | 17°C (63°F) | 50 mm (2.0 inches) | 85% | extreme |
| November Weather | 15°C (58°F) | 14 mm (0.5 inches) | 87% | very high |
| December Weather | 12°C (55°F) | 10 mm (0.4 inches) | 87% | very high |