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May Weather in San Fernando, United States

Last updated: June 24, 2025

In May, the average temperature in San Fernando, United States is a comfortable 18°C (65°F). Expect a range where the minimum dips to 7°C (45°F) and the maximum can soar up to 36°C (96°F). During this time, precipitation is typically around 15 mm (0.6 in) over 2 days, and the average humidity sits at 57%, making it a pleasant month to explore!

May Temperature in San Fernando

In May in San Fernando, the average temperature is 18°C (65°F). Maximum temperatures can reach up to 36°C (96°F), while minimums can dip as low as 7°C (45°F). This makes it an ideal time for travelers seeking a mix of warm and cool weather.

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 18°C (65°F), with highs reaching up to 36°C (96°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec545557636571777774686154
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 15 mm (0.6 in) over the course of 2 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 15 mm (0.6 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec7762852015211392084
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 57%. With an average temperature of 18°C (65°F), this humidity feels like a refreshing yet slightly sticky embrace, making it perfect for outdoor excursions but requiring a bit of extra care to stay comfortable while exploring.

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 57%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%82%76%68%58%52%46%39%48%59%72%76%
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 reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, 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 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111121110754
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 Weather12°C (54°F)77 mm (3.0 inches)78%moderate
February Weather13°C (55°F)62 mm (2.5 inches)82%high
March Weather14°C (57°F)85 mm (3.3 inches)75%very high
April Weather17°C (63°F)20 mm (0.8 inches)68%very high
May Weather18°C (65°F)15 mm (0.6 inches)57%extreme
June Weather22°C (71°F)2 mm (0.1 inches)52%extreme
July Weather25°C (77°F)1 mm (0.0 inches)46%extreme
August Weather25°C (78°F)1 mm (0.0 inches)39%extreme
September Weather23°C (75°F)3 mm (0.1 inches)48%very high
October Weather20°C (69°F)9 mm (0.4 inches)59%high
November Weather16°C (62°F)20 mm (0.8 inches)72%moderate
December Weather12°C (54°F)84 mm (3.3 inches)76%moderate

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