Last updated: June 24, 2025
In Rancho Santa Margarita, United States, the average temperature in September hovers around 24°C (75°F), creating a pleasant environment for outdoor activities. However, temperatures can fluctuate significantly, with a minimum of 13°C (55°F) and soaring up to a sizzling 44°C (112°F). Rainfall is minimal, with an average precipitation of just 4 mm (0.2 in) over 0 days, while the average humidity sits at 68%. Enjoy the warmth while staying hydrated!
In September in Rancho Santa Margarita, the average temperature is 24°C (75°F). Maximum can reach 44°C (112°F), and minimum can be as low as 13°C (55°F). Be prepared for warm days and cool evenings, making it an ideal time for outdoor activities and exploration.
In Rancho Santa Margarita in September, the precipitation amount is 4 mm (0.2 in) over the course of 0 days.
In Rancho Santa Margarita in September, humidity is 68%. With an average temperature of 24°C (75°F), this humidity feels like a warm, enveloping embrace that can leave travelers feeling sticky and slightly fatigued, making it essential to stay hydrated and take breaks in shaded areas.
In Rancho Santa Margarita 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 Rancho Santa Margarita.
UV Risk Categories
Weather in Rancho Santa Margarita varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Rancho Santa Margarita, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 13°C (55°F) | 84 mm (3.3 inches) | 74% | moderate |
| February Weather | 13°C (55°F) | 78 mm (3.1 inches) | 79% | high |
| March Weather | 14°C (58°F) | 94 mm (3.7 inches) | 75% | very high |
| April Weather | 17°C (63°F) | 36 mm (1.4 inches) | 70% | very high |
| May Weather | 18°C (65°F) | 21 mm (0.8 inches) | 70% | extreme |
| June Weather | 21°C (71°F) | 2 mm (0.1 inches) | 72% | extreme |
| July Weather | 25°C (77°F) | 2 mm (0.1 inches) | 73% | extreme |
| August Weather | 25°C (78°F) | 2 mm (0.1 inches) | 69% | very high |
| September Weather | 24°C (75°F) | 4 mm (0.2 inches) | 68% | very high |
| October Weather | 20°C (69°F) | 13 mm (0.5 inches) | 67% | high |
| November Weather | 17°C (62°F) | 34 mm (1.3 inches) | 68% | moderate |
| December Weather | 13°C (55°F) | 85 mm (3.3 inches) | 71% | moderate |