Last updated: August 27, 2025
In Santo Tomas, Peru, the average temperature in September hovers around 8°C (46°F). Expect temperatures to range from a chilly -8°C (18°F) at their lowest to a pleasant 19°C (67°F) at their peak. During this month, you'll encounter about 40 mm (1.6 in) of precipitation over 11 days, contributing to an average humidity level of 67%. Stay prepared for a mix of weather as you enjoy the season!
In September in Santo Tomas, the average temperature is 8°C (46°F). The maximum can reach 19°C (67°F), while the minimum can drop as low as -8°C (18°F). Be prepared for a wide range of temperatures if you're planning to travel during this time.
In Santo Tomas in September, the precipitation amount is 40 mm (1.6 in) spread over a duration of 11 days.
In Santo Tomas in September, humidity is 67%. With an average temperature of 8°C (46°F), this humidity feels like a damp blanket enveloping you, making it feel colder than it actually is, which can be quite refreshing for exploring but may also require extra layers for comfort while traveling.
In Santo Tomas in September, the maximum UV index reaches an alarming 17, which falls under the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to stay protected. For more details on the hourly UV index in Santo Tomas, you can check Hourly UV Index in Santo Tomas.
UV Risk Categories
Weather in Santo Tomas varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Santo Tomas, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 8°C (46°F) | 213 mm (8.4 inches) | 92% | extreme |
| February Weather | 8°C (46°F) | 256 mm (10.1 inches) | 93% | extreme |
| March Weather | 8°C (46°F) | 239 mm (9.4 inches) | 92% | extreme |
| April Weather | 7°C (45°F) | 79 mm (3.1 inches) | 91% | extreme |
| May Weather | 6°C (43°F) | 25 mm (1.0 inches) | 87% | extreme |
| June Weather | 5°C (42°F) | 8 mm (0.3 inches) | 76% | extreme |
| July Weather | 5°C (42°F) | 10 mm (0.4 inches) | 57% | extreme |
| August Weather | 6°C (44°F) | 11 mm (0.4 inches) | 51% | extreme |
| September Weather | 8°C (46°F) | 40 mm (1.6 inches) | 67% | extreme |
| October Weather | 8°C (47°F) | 83 mm (3.3 inches) | 77% | extreme |
| November Weather | 9°C (48°F) | 127 mm (5.0 inches) | 85% | extreme |
| December Weather | 8°C (47°F) | 211 mm (8.3 inches) | 90% | extreme |