Last updated: August 27, 2025
The average temperature in San Antonio Canada, Mexico during September is a comfortable 18°C (65°F), with a minimum of 10°C (50°F) and a maximum reaching 27°C (81°F). However, be prepared for some wet days, as the area receives 227 mm (8.9 in) of precipitation over 24 days. With an average humidity of 86%, San Antonio Canada can feel quite moist, making it essential to pack accordingly!
In September in San Antonio Canada, the average temperature is 18°C (65°F), with maximums reaching up to 27°C (81°F) and minimums dropping as low as 10°C (50°F). This pleasant weather makes it an ideal time for outdoor activities and exploration.
In San Antonio Canada in September, the precipitation amount is 227 mm (8.9 in) over a span of 24 days.
In San Antonio Canada in September humidity is 86%. With an average temperature of 18°C (65°F), this humidity feels like you’re wrapped in a warm, heavy blanket, making outdoor activities feel quite muggy and sticky for traveling.
In San Antonio Canada in September, 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 Antonio Canada, you can check here.
UV Risk Categories
Weather in San Antonio Canada varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in San Antonio Canada, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 14°C (57°F) | 19 mm (0.7 inches) | 88% | very high |
| February Weather | 16°C (60°F) | 14 mm (0.5 inches) | 86% | extreme |
| March Weather | 17°C (62°F) | 23 mm (0.9 inches) | 84% | extreme |
| April Weather | 19°C (66°F) | 52 mm (2.0 inches) | 81% | extreme |
| May Weather | 19°C (67°F) | 102 mm (4.0 inches) | 82% | extreme |
| June Weather | 18°C (65°F) | 198 mm (7.8 inches) | 81% | extreme |
| July Weather | 18°C (65°F) | 122 mm (4.8 inches) | 81% | extreme |
| August Weather | 18°C (65°F) | 138 mm (5.5 inches) | 82% | extreme |
| September Weather | 18°C (65°F) | 227 mm (8.9 inches) | 86% | extreme |
| October Weather | 17°C (64°F) | 112 mm (4.4 inches) | 90% | extreme |
| November Weather | 15°C (60°F) | 40 mm (1.6 inches) | 91% | very high |
| December Weather | 14°C (58°F) | 13 mm (0.5 inches) | 91% | very high |