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May Weather in San Carlos, United States

Last updated: June 24, 2025

In San Carlos, United States, the average temperature in May reaches a warm 28°C (82°F). However, temperatures can vary significantly, with a minimum of 15°C (59°F) and soaring to a maximum of 39°C (103°F). Expect 86 mm (3.4 in) of precipitation over about 8 days, contributing to an average humidity of a humid 80%.

May Temperature in San Carlos

In May, in San Carlos, the average temperature is 28°C (82°F). The maximum can reach 39°C (103°F), while the minimum can drop to as low as 15°C (59°F). Be prepared for warm days but cooler nights when traveling during this time.

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

The chart illustrates May temperature patterns in San Carlos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Carlos, May typically has an average temperature of 28°C (82°F), with highs reaching up to 39°C (103°F) and lows dropping to around 15°C (59°F).
JanFebMarAprMayJunJulAugSepOctNovDec626572778285868783776964
Data source: Temperature data for San Carlos 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 Carlos

In San Carlos in May, the precipitation amount reaches 86 mm (3.4 in) over the course of 8 days.

May Precipitation Trends in San Carlos

The chart displays monthly precipitation patterns in San Carlos, 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 Carlos, May typically receives around 86 mm (3.4 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec2322323086879728101583022
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in San Carlos

In San Carlos in May, humidity is 80%. With an average temperature of 28°C (82°F), this humidity feels like a warm, thick blanket enveloping you, making outdoor activities sweaty and demanding frequent breaks in the shade while traveling.

May Average Humidity in San Carlos

This chart illustrates the average monthly humidity levels in San Carlos, 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 Carlos is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%79%76%77%80%73%66%65%73%76%80%86%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in San Carlos

In San Carlos in May, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in San Carlos.

Maximum UV Index Levels in San Carlos for May

The chart shows the monthly maximum UV Index (UVI) for San Carlos 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 Carlos typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec6910111212121211976
Data source: San Carlos 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 Carlos Compares to Other Months

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

This table compares monthly weather conditions in San Carlos, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather17°C (62°F)22 mm (0.9 inches)83%high
February Weather18°C (65°F)22 mm (0.9 inches)79%very high
March Weather22°C (72°F)32 mm (1.2 inches)76%very high
April Weather25°C (77°F)30 mm (1.2 inches)77%extreme
May Weather28°C (82°F)86 mm (3.4 inches)80%extreme
June Weather29°C (85°F)87 mm (3.4 inches)73%extreme
July Weather30°C (86°F)97 mm (3.8 inches)66%extreme
August Weather31°C (88°F)28 mm (1.1 inches)65%extreme
September Weather29°C (84°F)101 mm (4.0 inches)73%extreme
October Weather25°C (77°F)58 mm (2.3 inches)76%very high
November Weather21°C (69°F)30 mm (1.2 inches)80%high
December Weather18°C (65°F)22 mm (0.8 inches)86%high

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