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May Weather in Monterey, United States

Last updated: June 24, 2025

In May, the average temperature in Monterey, United States hovers around 15°C (60°F). You can expect temperatures to vary between a chilly -4°C (26°F) at the lowest and a warm 28°C (83°F) at the highest. Be prepared for 151 mm (5.9 in) of precipitation over approximately 17 days, with an average humidity level of 78%.

May Temperature in Monterey

In May in Monterey, the average temperature is 15°C (60°F), with maximums reaching 28°C (83°F) and minimums dropping as low as -4°C (26°F). Be prepared for a wide range of weather conditions during your travels!

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 15°C (60°F), with highs reaching up to 28°C (83°F) and lows dropping to around -4°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec303640505966706863544035
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 151 mm (5.9 in) over a span of 17 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 151 mm (5.9 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec7611586126151107861291171167296
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 78%. With an average temperature of 15°C (60°F), this humidity feels like a warm, damp embrace that can make outdoor activities a bit uncomfortable, highlighting the importance of staying hydrated and taking breaks in the shade while exploring.

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 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%84%78%79%70%59%68%80%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 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 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 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36810111111109753
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-1°C (31°F)76 mm (3.0 inches)86%moderate
February Weather2°C (36°F)115 mm (4.5 inches)86%high
March Weather5°C (41°F)86 mm (3.4 inches)86%very high
April Weather10°C (50°F)126 mm (5.0 inches)84%very high
May Weather15°C (60°F)151 mm (5.9 inches)78%extreme
June Weather19°C (66°F)107 mm (4.2 inches)79%extreme
July Weather21°C (70°F)86 mm (3.4 inches)70%extreme
August Weather20°C (68°F)129 mm (5.1 inches)59%very high
September Weather17°C (64°F)117 mm (4.6 inches)68%very high
October Weather12°C (54°F)115 mm (4.5 inches)80%high
November Weather4°C (40°F)72 mm (2.8 inches)86%moderate
December Weather2°C (35°F)96 mm (3.8 inches)85%moderate

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