Last updated: June 24, 2025
In Santa Ana, United States, the average temperature in September hovers around 22°C (72°F), with a minimum of 13°C (56°F) and a maximum reaching up to 40°C (104°F). Despite these warm conditions, you can expect only 3 mm (0.1 in) of precipitation over 0 days, complemented by an average humidity of 68%. Perfect weather for exploring or relaxing!
In September in Santa Ana, the average temperature is 22°C (72°F). The maximum can reach 40°C (104°F), while the minimum can be as low as 13°C (56°F). It's advisable to pack both light clothing for the warm days and some layers for the cooler evenings.
In Santa Ana in September, the precipitation amount is 3 mm (0.1 in) during a total of 0 days.
In Santa Ana in September humidity is 68%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, slightly stifling but still manageable for traveling, creating an atmosphere that encourages leisurely outdoor activities while prompting occasional breaks for refreshment.
In Santa Ana in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Santa Ana.
UV Risk Categories
Weather in Santa Ana varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Santa Ana, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 13°C (56°F) | 71 mm (2.8 inches) | 74% | moderate |
| February Weather | 13°C (56°F) | 60 mm (2.3 inches) | 79% | high |
| March Weather | 14°C (58°F) | 68 mm (2.7 inches) | 75% | very high |
| April Weather | 17°C (62°F) | 27 mm (1.1 inches) | 70% | very high |
| May Weather | 17°C (64°F) | 13 mm (0.5 inches) | 70% | extreme |
| June Weather | 20°C (68°F) | 1 mm (0.0 inches) | 72% | extreme |
| July Weather | 23°C (73°F) | 2 mm (0.1 inches) | 73% | extreme |
| August Weather | 23°C (74°F) | 2 mm (0.1 inches) | 69% | very high |
| September Weather | 22°C (72°F) | 3 mm (0.1 inches) | 68% | very high |
| October Weather | 20°C (69°F) | 10 mm (0.4 inches) | 67% | high |
| November Weather | 17°C (62°F) | 25 mm (1.0 inches) | 68% | moderate |
| December Weather | 13°C (56°F) | 74 mm (2.9 inches) | 71% | moderate |