Last updated: August 27, 2025
In May, the average temperature in San Bernardino, Peru is a comfortable 16°C (60°F), with daytime highs reaching up to 24°C (75°F) and nighttime lows dipping to around 8°C (47°F). Prepare for a moderately wet month, as you can expect about 347 mm (13.7 in) of precipitation over 29 days. With an average humidity level of 78%, be ready for a refreshing atmosphere that adds to the charm of the season!
In May in San Bernardino, the average temperature is 16°C (60°F). The maximum can reach 24°C (75°F), and the minimum can be as low as 8°C (47°F). It's a great time to explore San Bernardino, as the mild weather offers comfortable conditions for outdoor activities.
In San Bernardino in May, the precipitation amount is 347 mm (13.7 in) spread over the course of 29 days.
In San Bernardino in May humidity is 78%. With an average temperature of 16°C (60°F), this humidity feels like a damp embrace, making travel a bit uncomfortable as the air clings to your skin and leaves you feeling sticky.
In San Bernardino in May, 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 San Bernardino, you can check here.
UV Risk Categories
Weather in San Bernardino varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in San Bernardino, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 15°C (60°F) | 325 mm (12.8 inches) | 83% | extreme |
| February Weather | 15°C (59°F) | 410 mm (16.2 inches) | 81% | extreme |
| March Weather | 15°C (59°F) | 552 mm (21.7 inches) | 88% | extreme |
| April Weather | 15°C (60°F) | 460 mm (18.1 inches) | 85% | extreme |
| May Weather | 16°C (60°F) | 347 mm (13.7 inches) | 78% | extreme |
| June Weather | 16°C (61°F) | 127 mm (5.0 inches) | 62% | extreme |
| July Weather | 16°C (61°F) | 82 mm (3.2 inches) | 44% | extreme |
| August Weather | 16°C (62°F) | 49 mm (1.9 inches) | 38% | extreme |
| September Weather | 16°C (62°F) | 184 mm (7.3 inches) | 42% | extreme |
| October Weather | 16°C (61°F) | 299 mm (11.8 inches) | 58% | extreme |
| November Weather | 16°C (60°F) | 179 mm (7.0 inches) | 69% | extreme |
| December Weather | 15°C (60°F) | 428 mm (16.9 inches) | 82% | extreme |