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May Weather in San Manuel, United States

Last updated: June 24, 2025

In San Manuel, United States, the average temperature in May hovers around 22°C (73°F). While you might enjoy a pleasant day, be prepared for a temperature range that can dip to a chilly 6°C (44°F) and soar up to a scorching 37°C (99°F). Expect about 8 mm (0.3 in) of rainfall spread over 2 days, with average humidity levels at 40%. Embrace the variety and plan accordingly!

May Temperature in San Manuel

In May in San Manuel, the average temperature is 22°C (73°F). The maximum can reach 37°C (99°F), while the minimum can drop as low as 6°C (44°F). Pack accordingly to enjoy the diverse weather conditions during your travels!

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

The chart illustrates May temperature patterns in San Manuel, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Manuel, May typically has an average temperature of 22°C (73°F), with highs reaching up to 37°C (99°F) and lows dropping to around 6°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec485056667283828077675949
Data source: Temperature data for San Manuel 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 Manuel

In San Manuel in May, the precipitation amount is 8 mm (0.3 in) over the course of 2 days.

May Precipitation Trends in San Manuel

The chart displays monthly precipitation patterns in San Manuel, 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 Manuel, May typically receives around 8 mm (0.3 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec43553158141129243212443
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in San Manuel

In San Manuel in May humidity is 40%. With an average temperature of 22°C (73°F), this humidity feels like a refreshing breeze, making it comfortable for traveling and exploring the surroundings without feeling overheated or sticky.

May Average Humidity in San Manuel

This chart illustrates the average monthly humidity levels in San Manuel, 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 Manuel is approximately 40%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%79%67%55%40%33%34%48%64%67%77%82%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in San Manuel

In San Manuel 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 Manuel.

Maximum UV Index Levels in San Manuel for May

The chart shows the monthly maximum UV Index (UVI) for San Manuel 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 Manuel typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec5710111213121111865
Data source: San Manuel 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 Manuel Compares to Other Months

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

This table compares monthly weather conditions in San Manuel, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (48°F)43 mm (1.7 inches)76%moderate
February Weather10°C (50°F)55 mm (2.2 inches)79%high
March Weather13°C (56°F)31 mm (1.2 inches)67%very high
April Weather19°C (66°F)5 mm (0.2 inches)55%extreme
May Weather22°C (73°F)8 mm (0.3 inches)40%extreme
June Weather28°C (83°F)14 mm (0.6 inches)33%extreme
July Weather28°C (82°F)112 mm (4.4 inches)34%extreme
August Weather27°C (81°F)92 mm (3.6 inches)48%extreme
September Weather25°C (77°F)43 mm (1.7 inches)64%extreme
October Weather20°C (68°F)21 mm (0.8 inches)67%very high
November Weather15°C (59°F)24 mm (0.9 inches)77%high
December Weather9°C (49°F)43 mm (1.7 inches)82%moderate

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