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May Weather in San Fernando, Mexico

Last updated: August 27, 2025

In May, the average temperature in San Fernando, Mexico is a warm 28°C (83°F). Expect temperatures to range from a minimum of 15°C (60°F) to a sizzling maximum of 39°C (103°F). Visitors should also prepare for 58 mm (2.3 in) of precipitation over approximately 8 days, along with an average humidity of 82%, making for a vibrant, tropical experience!

May Temperature in San Fernando

In May in San Fernando, the average temperature is 28°C (83°F), with maximums reaching 39°C (103°F) and minimums dropping as low as 15°C (60°F). Be prepared for warm days and cooler nights when planning your travel.

May Weather in San Fernando: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in San Fernando, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Fernando, May typically has an average temperature of 28°C (83°F), with highs reaching up to 39°C (103°F) and lows dropping to around 15°C (60°F).
JanFebMarAprMayJunJulAugSepOctNovDec636672778285858782776965
Data source: Temperature data for San Fernando generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in San Fernando

In San Fernando in May, the precipitation amount is 58 mm (2.3 in) over a span of 8 days.

May Precipitation Trends in San Fernando

The chart displays monthly precipitation patterns in San Fernando, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In San Fernando, May typically receives around 58 mm (2.3 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec2416363058738625109873313
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in San Fernando

In San Fernando in May, humidity is 82%. With an average temperature of 28°C (83°F), this humidity feels like stepping into a warm, damp embrace, which can make traveling feel heavy and exhausting, as every movement can be met with a sticky veil of moisture that clings to the skin.

May Average Humidity in San Fernando

This chart illustrates the average monthly humidity levels in San Fernando, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in San Fernando is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%78%81%82%74%68%67%75%78%83%86%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in San Fernando

In San Fernando in May, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in San Fernando.

Maximum UV Index Levels in San Fernando for May

The chart shows the monthly maximum UV Index (UVI) for San Fernando in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In May, the maximum UV index in San Fernando typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec79111212121212111086
Data source: San Fernando May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How May Weather in San Fernando Compares to Other Months

Weather in San Fernando varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in San Fernando, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in San Fernando, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather17°C (63°F)24 mm (0.9 inches)84%high
February Weather19°C (67°F)16 mm (0.6 inches)83%very high
March Weather22°C (73°F)36 mm (1.4 inches)78%extreme
April Weather25°C (78°F)30 mm (1.2 inches)81%extreme
May Weather28°C (83°F)58 mm (2.3 inches)82%extreme
June Weather29°C (85°F)72 mm (2.9 inches)74%extreme
July Weather30°C (86°F)86 mm (3.4 inches)68%extreme
August Weather30°C (87°F)25 mm (1.0 inches)67%extreme
September Weather28°C (83°F)109 mm (4.3 inches)75%extreme
October Weather25°C (77°F)87 mm (3.4 inches)78%very high
November Weather21°C (70°F)33 mm (1.3 inches)83%very high
December Weather18°C (66°F)13 mm (0.5 inches)86%high

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