September Weather in San Guillermo

Last updated: March 2, 2024

The weather in San Guillermo, Mexico, during September is characterized by an average temperature of 22°C (73°F). Highs can soar to 33°C (91°F), while lows may dip to 13°C (57°F). Typically, the humidity level in San Guillermo throughout September hovers around 79%.

13°C (57°F)

Minimum temperature

22°C (73°F)

Average temperature

33°C (91°F)

Maximum temperature

79%

Humidity

Precipitation and Sunshine hours

In September, San Guillermo averages 87 mm (3.4 inches) of rainfall, typically over the course of 13 rainy days. The month enjoys an average of 12 hours 17 minutes of daylight, with the sun shining for approximately 9 hours 49 minutes each day. Additionally, there is a 63% probability of sunny days during this period.

87 mm (3.4 inches)

Precipitation

13 rainy days

Rainy days

9 hours 49 minutes

Sunshine hours

63%

Chance of sun

UV Index

In September, the UV Index in San Guillermo reaches a maximum of 12, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 10 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00
UVI 1 1 3 6 9 11 12 11 9 5 3 1 1
Exposure Low Moderate High VeryHigh Extreme VeryHigh Moderate Low
Time to burn 45 min 30 min 25 min 15 min 10 min 15 min 30 min 45 min

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