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May Weather in Los Altos, United States

Last updated: June 24, 2025

In May, the average temperature in Los Altos, United States is a pleasant 16°C (61°F). You can expect temperatures to vary, with a minimum of 6°C (43°F) and a possible maximum of 34°C (93°F). Precipitation is relatively low, averaging 23 mm (0.9 in) over 2 days, while the average humidity sits at a comfortable 71%.

May Temperature in Los Altos

In May in Los Altos, the average temperature is 16°C (61°F), with maximums reaching up to 34°C (93°F) and minimums dropping as low as 6°C (43°F). This range makes it an ideal time for travelers to enjoy a variety of outdoor activities while being prepared for both warm and cooler conditions.

May Weather in Los Altos: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Los Altos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Los Altos, May typically has an average temperature of 16°C (61°F), with highs reaching up to 34°C (93°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec505254576066687068645650
Data source: Temperature data for Los Altos 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 Los Altos

In Los Altos in May, the precipitation amount is 23 mm (0.9 in) over a span of 2 days.

May Precipitation Trends in Los Altos

The chart displays monthly precipitation patterns in Los Altos, 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 Los Altos, May typically receives around 23 mm (0.9 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec98958731241002224081
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Los Altos

In Los Altos in May humidity is 71%. With an average temperature of 16°C (61°F), this humidity feels like walking through a warm, damp blanket, making travel slightly uncomfortable but still enjoyable for those who appreciate mild weather.

May Average Humidity in Los Altos

This chart illustrates the average monthly humidity levels in Los Altos, 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 Los Altos 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 Los Altos

In Los Altos 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 Los Altos.

Maximum UV Index Levels in Los Altos for May

The chart shows the monthly maximum UV Index (UVI) for Los Altos 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 Los Altos typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3589101111109753
Data source: Los Altos 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 Los Altos Compares to Other Months

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

This table compares monthly weather conditions in Los Altos, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (51°F)98 mm (3.9 inches)82%moderate
February Weather11°C (52°F)95 mm (3.8 inches)84%moderate
March Weather12°C (54°F)87 mm (3.4 inches)82%very high
April Weather14°C (57°F)30 mm (1.2 inches)78%very high
May Weather16°C (61°F)23 mm (0.9 inches)71%very high
June Weather19°C (66°F)1 mm (0.0 inches)64%extreme
July Weather20°C (69°F)0 mm (0.0 inches)58%extreme
August Weather21°C (70°F)0 mm (0.0 inches)54%very high
September Weather20°C (69°F)2 mm (0.1 inches)55%very high
October Weather18°C (64°F)22 mm (0.9 inches)62%high
November Weather13°C (56°F)40 mm (1.6 inches)78%moderate
December Weather10°C (51°F)81 mm (3.2 inches)80%moderate

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