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May Weather in San Leandro, United States

Last updated: June 24, 2025

In San Leandro, United States, the average temperature in May is a comfortable 15°C (60°F). However, be prepared for a temperature range that can dip to a minimum of 6°C (44°F) and soar up to a maximum of 32°C (90°F). During this month, expect about 18 mm (0.7 in) of precipitation over 2 days, combined with an average humidity level of 71%, creating a uniquely refreshing atmosphere.

May Temperature in San Leandro

In May in San Leandro, the average temperature is 15°C (60°F). Maximum temperatures can reach 32°C (90°F), while the minimum can drop to as low as 6°C (44°F). Be prepared for a range of temperatures, ideal for layering clothing during your travels.

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

The chart illustrates May temperature patterns in San Leandro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Leandro, May typically has an average temperature of 15°C (60°F), with highs reaching up to 32°C (90°F) and lows dropping to around 6°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec515254576064646566625550
Data source: Temperature data for San Leandro 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 Leandro

In San Leandro in May, the precipitation amount is 18 mm (0.7 in) over the course of 2 days.

May Precipitation Trends in San Leandro

The chart displays monthly precipitation patterns in San Leandro, 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 Leandro, May typically receives around 18 mm (0.7 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec94917430182001244281
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in San Leandro

In San Leandro in May humidity is 71%. With an average temperature of 15°C (60°F), this humidity feels like a warm blanket wrapped around you, making travel slightly uncomfortable as you feel sticky and sluggish.

May Average Humidity in San Leandro

This chart illustrates the average monthly humidity levels in San Leandro, 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 Leandro is approximately 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%84%82%78%71%64%59%54%55%62%78%80%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in San Leandro

In San Leandro in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in San Leandro.

Maximum UV Index Levels in San Leandro for May

The chart shows the monthly maximum UV Index (UVI) for San Leandro 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 Leandro typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3589101111109743
Data source: San Leandro 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 Leandro Compares to Other Months

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

This table compares monthly weather conditions in San Leandro, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (51°F)94 mm (3.7 inches)82%moderate
February Weather11°C (53°F)91 mm (3.6 inches)84%moderate
March Weather12°C (54°F)73 mm (2.9 inches)82%very high
April Weather14°C (58°F)29 mm (1.2 inches)78%very high
May Weather15°C (60°F)18 mm (0.7 inches)71%very high
June Weather18°C (64°F)2 mm (0.1 inches)64%extreme
July Weather18°C (64°F)0 mm (0.0 inches)58%extreme
August Weather18°C (65°F)0 mm (0.0 inches)54%very high
September Weather19°C (66°F)1 mm (0.0 inches)55%very high
October Weather17°C (63°F)24 mm (1.0 inches)62%high
November Weather13°C (56°F)42 mm (1.7 inches)78%moderate
December Weather10°C (51°F)80 mm (3.2 inches)80%moderate

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