Last updated: August 27, 2025
In September, the average temperature in Santa Maria, Mexico is a pleasant 21°C (70°F). Expect a minimum of 15°C (60°F) and a maximum that can reach up to 30°C (86°F). Be prepared for some rain, with an average precipitation of 218 mm (8.6 in) spread over 23 days, and a high average humidity of 84%.
In September in Santa Maria, the average temperature is 21°C (70°F). Maximum temperatures can reach 30°C (86°F), while minimums can drop to as low as 15°C (60°F). This mild climate makes it an ideal time to explore the outdoors and enjoy various activities.
In Santa Maria in September, the precipitation amount is 218 mm (8.6 in) during 23 days, indicating a relatively wet period for that time of year.
In Santa Maria in September, humidity is 84%. With an average temperature of 21°C (70°F), this humidity feels like thick, warm air wrapping around you, making outdoor activities quite uncomfortable and necessitating frequent hydration breaks for a more enjoyable travel experience.
In Santa Maria 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 Santa Maria, you can check here.
UV Risk Categories
Weather in Santa Maria varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Santa Maria, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 16°C (62°F) | 9 mm (0.3 inches) | 64% | very high |
| February Weather | 18°C (65°F) | 14 mm (0.5 inches) | 57% | extreme |
| March Weather | 21°C (70°F) | 4 mm (0.1 inches) | 46% | extreme |
| April Weather | 22°C (72°F) | 1 mm (0.0 inches) | 42% | extreme |
| May Weather | 24°C (75°F) | 19 mm (0.7 inches) | 51% | extreme |
| June Weather | 23°C (74°F) | 112 mm (4.4 inches) | 74% | extreme |
| July Weather | 21°C (71°F) | 226 mm (8.9 inches) | 79% | extreme |
| August Weather | 21°C (71°F) | 197 mm (7.8 inches) | 81% | extreme |
| September Weather | 21°C (70°F) | 218 mm (8.6 inches) | 84% | extreme |
| October Weather | 21°C (69°F) | 69 mm (2.7 inches) | 75% | extreme |
| November Weather | 19°C (66°F) | 23 mm (0.9 inches) | 71% | very high |
| December Weather | 16°C (62°F) | 12 mm (0.5 inches) | 74% | very high |