Last updated: August 27, 2025
In September, the average temperature in Valle del Rosario, Mexico is a pleasant 21°C (71°F). Expect a range between a cool 10°C (51°F) at night and a warm 34°C (94°F) during the day. With 81 mm (3.2 in) of precipitation spread over 12 days, it's a good idea to carry an umbrella. The average humidity hovers around 86%, creating a tropical feel that's sure to enchant.
In September in Valle del Rosario, the average temperature is 21°C (71°F), with maximums reaching up to 34°C (94°F) and minimums dropping as low as 10°C (51°F). This makes it an ideal time for travelers seeking comfortable weather along with the opportunity to enjoy both warm and cooler moments.
In Valle del Rosario in September, the precipitation amount is 81 mm (3.2 in) over a span of 12 days.
In Valle del Rosario in September, humidity is 86%. With an average temperature of 21°C (71°F), this humidity feels like a warm, dense blanket wrapping around you, making outdoor activities feel slightly stifling and requiring frequent breaks for hydration.
In Valle del Rosario 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 Valle del Rosario.
UV Risk Categories
Weather in Valle del Rosario varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Valle del Rosario, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 10°C (51°F) | 5 mm (0.2 inches) | 75% | high |
| February Weather | 13°C (55°F) | 5 mm (0.2 inches) | 65% | very high |
| March Weather | 16°C (62°F) | 3 mm (0.1 inches) | 58% | extreme |
| April Weather | 20°C (68°F) | 2 mm (0.1 inches) | 48% | extreme |
| May Weather | 24°C (75°F) | 3 mm (0.1 inches) | 48% | extreme |
| June Weather | 27°C (80°F) | 25 mm (1.0 inches) | 54% | extreme |
| July Weather | 24°C (76°F) | 80 mm (3.1 inches) | 72% | extreme |
| August Weather | 24°C (76°F) | 71 mm (2.8 inches) | 77% | extreme |
| September Weather | 21°C (71°F) | 81 mm (3.2 inches) | 86% | extreme |
| October Weather | 19°C (67°F) | 27 mm (1.1 inches) | 82% | extreme |
| November Weather | 15°C (59°F) | 14 mm (0.6 inches) | 85% | very high |
| December Weather | 11°C (51°F) | 18 mm (0.7 inches) | 87% | high |