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May Weather in Monterey, United States

Last updated: June 24, 2025

In Monterey, United States, the average temperature in May hovers around 14°C (57°F), but prepare for extremes: it can dip to a chilly -1°C (30°F) or soar to a warm 32°C (89°F). Expect 115 mm (4.5 in) of rainfall over 14 days, contributing to an average humidity of 76%. Stay cool and dry as you experience the blend of warmth and moisture this month brings!

May Temperature in Monterey

In May in Monterey, the average temperature is 14°C (57°F), with maximums reaching 32°C (89°F) and minimums dropping as low as -1°C (30°F). Travelers should be prepared for a wide range of temperatures, making it essential to pack accordingly for both warm and cool conditions.

May Weather in Monterey: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Monterey, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Monterey, May typically has an average temperature of 14°C (57°F), with highs reaching up to 32°C (89°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec252834465766727063533830
Data source: Temperature data for Monterey 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 Monterey

In Monterey in May, the precipitation amount is 115 mm (4.5 in) over the course of 14 days.

May Precipitation Trends in Monterey

The chart displays monthly precipitation patterns in Monterey, 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 Monterey, May typically receives around 115 mm (4.5 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec81988713211585136107111152101113
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Monterey

In Monterey in May humidity is 76%. With an average temperature of 14°C (57°F), this humidity feels like a warm blanket wrapped around you, creating a heavy atmosphere that can make outdoor activities feel sluggish and stifling, urging travelers to seek shade and refreshment more frequently.

May Average Humidity in Monterey

This chart illustrates the average monthly humidity levels in Monterey, 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 Monterey is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%88%86%84%76%72%67%64%72%81%87%85%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Monterey

In Monterey 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 Monterey.

Maximum UV Index Levels in Monterey for May

The chart shows the monthly maximum UV Index (UVI) for Monterey 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 Monterey typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35681010998642
Data source: Monterey 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 Monterey Compares to Other Months

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

This table compares monthly weather conditions in Monterey, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (26°F)81 mm (3.2 inches)89%moderate
February Weather-2°C (29°F)98 mm (3.9 inches)88%moderate
March Weather1°C (34°F)87 mm (3.4 inches)86%high
April Weather8°C (46°F)132 mm (5.2 inches)84%very high
May Weather14°C (57°F)115 mm (4.5 inches)76%very high
June Weather19°C (66°F)85 mm (3.4 inches)72%very high
July Weather22°C (72°F)136 mm (5.4 inches)66%very high
August Weather21°C (70°F)107 mm (4.2 inches)64%very high
September Weather17°C (64°F)111 mm (4.4 inches)72%very high
October Weather11°C (53°F)152 mm (6.0 inches)81%high
November Weather4°C (39°F)101 mm (4.0 inches)87%moderate
December Weather-1°C (30°F)113 mm (4.4 inches)84%low

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