Last updated: August 26, 2025
In September, the average temperature in San Francisco (Banos de Agua Caliente), Mexico hovers around 20°C (68°F), with minimums dropping to 9°C (49°F) and maximums soaring up to 31°C (88°F). Expect 147 mm (5.8 in) of precipitation over approximately 17 days, contributing to an average humidity of 81%. Prepare for a mix of weather as you explore!
In September in San Francisco (Banos de Agua Caliente), the average temperature is 20°C (68°F). The maximum can reach 31°C (88°F), and the minimum can be as low as 9°C (49°F). This pleasant climate makes San Francisco (Banos de Agua Caliente) an ideal destination for outdoor activities and sightseeing during this time of year.
In San Francisco (Banos de Agua Caliente) in September, the precipitation amount is 147 mm (5.8 in) over a span of 17 days.
In San Francisco (Banos de Agua Caliente) in September humidity is 81%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace that can make outdoor activities feel steamy and exhausting, potentially leading travelers to seek shade or a refreshing drink more often.
In San Francisco (Banos de Agua Caliente) 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 San Francisco (Banos de Agua Caliente), you can check here.
UV Risk Categories
Weather in San Francisco (Banos de Agua Caliente) varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in San Francisco (Banos de Agua Caliente), focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 15°C (59°F) | 4 mm (0.2 inches) | 74% | very high |
| February Weather | 17°C (64°F) | 6 mm (0.2 inches) | 65% | extreme |
| March Weather | 20°C (69°F) | 7 mm (0.3 inches) | 58% | extreme |
| April Weather | 22°C (72°F) | 3 mm (0.1 inches) | 58% | extreme |
| May Weather | 23°C (74°F) | 36 mm (1.4 inches) | 67% | extreme |
| June Weather | 22°C (72°F) | 156 mm (6.2 inches) | 76% | extreme |
| July Weather | 20°C (69°F) | 160 mm (6.3 inches) | 67% | extreme |
| August Weather | 20°C (69°F) | 145 mm (5.7 inches) | 68% | extreme |
| September Weather | 20°C (68°F) | 147 mm (5.8 inches) | 81% | extreme |
| October Weather | 19°C (67°F) | 48 mm (1.9 inches) | 83% | extreme |
| November Weather | 17°C (63°F) | 16 mm (0.6 inches) | 84% | very high |
| December Weather | 15°C (59°F) | 4 mm (0.1 inches) | 81% | very high |