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May Weather in Monterey, United States

Last updated: June 24, 2025

In May, the average temperature in Monterey, United States is a pleasant 20°C (68°F). However, you can expect some variation, with a minimum dipping to 1°C (34°F) and a maximum soaring to 33°C (92°F). During this time, the area experiences approximately 138 mm (5.4 in) of precipitation over 13 days, contributing to an average humidity level of 82%.

May Temperature in Monterey

In May in Monterey, the average temperature is 20°C (68°F), with maximums reaching 33°C (92°F) and minimums dropping as low as 1°C (34°F). This variability makes it essential for travelers to pack versatile clothing to accommodate both warm days and cooler nights.

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 20°C (68°F), with highs reaching up to 33°C (92°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec394551586874787672624744
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 138 mm (5.4 in) over the course of 13 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 138 mm (5.4 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec10819316115313813313313011913278150
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 82%. With an average temperature of 20°C (68°F), this humidity feels like a warm, enveloping blanket that makes traveling a bit sluggish but surprisingly refreshing, as long as you take breaks in shaded areas to cool off.

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 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%86%86%82%83%83%80%74%71%78%88%88%
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.
JanFebMarAprMayJunJulAugSepOctNovDec36710111111109753
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 Weather4°C (40°F)108 mm (4.3 inches)87%moderate
February Weather7°C (45°F)192 mm (7.6 inches)86%high
March Weather11°C (51°F)161 mm (6.3 inches)86%high
April Weather14°C (58°F)153 mm (6.0 inches)82%very high
May Weather20°C (68°F)138 mm (5.4 inches)82%extreme
June Weather23°C (74°F)133 mm (5.2 inches)83%extreme
July Weather25°C (78°F)133 mm (5.2 inches)80%extreme
August Weather24°C (76°F)130 mm (5.1 inches)74%very high
September Weather22°C (72°F)119 mm (4.7 inches)71%very high
October Weather17°C (62°F)132 mm (5.2 inches)78%high
November Weather9°C (48°F)78 mm (3.1 inches)88%moderate
December Weather7°C (44°F)150 mm (5.9 inches)88%moderate

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