Last updated: August 31, 2025
In September, the average temperature in Santa Clara, Puerto Rico hovers around 26°C (80°F), offering a delightful warmth. Expect a cozy minimum temperature of 23°C (73°F) and a balmy maximum of 32°C (90°F). With precipitation reaching 182 mm (7.2 in) over 26 days, you might want to bring an umbrella! The average humidity stands high at 79%, making for a typically tropical atmosphere.
In September in Santa Clara, the average temperature is 26°C (80°F). Maximums can reach 32°C (90°F), while minimums can drop to as low as 23°C (73°F). This pleasant climate makes it an ideal time to explore the vibrant surroundings and enjoy outdoor activities.
In Santa Clara in September, the total precipitation amount is 182 mm (7.2 in), observed over the course of 26 days.
In Santa Clara in September, humidity is 79%. With an average temperature of 26°C (80°F), this humidity feels like an enveloping warm blanket, making travel feel slightly sluggish and prompting frequent hydration breaks to stay comfortable while exploring the sights.
In Santa Clara in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Santa Clara.
UV Risk Categories
Weather in Santa Clara varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Santa Clara, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 23°C (74°F) | 37 mm (1.5 inches) | 76% | very high |
| February Weather | 23°C (74°F) | 42 mm (1.6 inches) | 75% | extreme |
| March Weather | 24°C (75°F) | 78 mm (3.1 inches) | 74% | extreme |
| April Weather | 24°C (76°F) | 70 mm (2.8 inches) | 75% | extreme |
| May Weather | 25°C (78°F) | 78 mm (3.1 inches) | 75% | extreme |
| June Weather | 26°C (79°F) | 78 mm (3.1 inches) | 77% | extreme |
| July Weather | 27°C (80°F) | 91 mm (3.6 inches) | 80% | extreme |
| August Weather | 27°C (80°F) | 102 mm (4.0 inches) | 80% | extreme |
| September Weather | 26°C (80°F) | 182 mm (7.2 inches) | 79% | extreme |
| October Weather | 26°C (79°F) | 154 mm (6.1 inches) | 78% | extreme |
| November Weather | 25°C (77°F) | 107 mm (4.2 inches) | 78% | very high |
| December Weather | 24°C (76°F) | 45 mm (1.8 inches) | 76% | very high |