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May Weather in Walnut, United States

Last updated: June 24, 2025

In Walnut, United States, the average temperature in May hovers around 17°C (62°F). Be prepared for a range in temperatures, where the minimum can dip to -1°C (31°F) and the maximum can soar to 34°C (93°F). During this month, you can expect about 173 mm (6.8 in) of precipitation over approximately 16 days, contributing to an average humidity of 79%. Stay ready for a mix of weather!

May Temperature in Walnut

In May in Walnut, the average temperature is 17°C (62°F). Maximum temperatures can reach 34°C (93°F), while minimums can drop to as low as -1°C (31°F). This varied climate makes Walnut an ideal destination for travelers seeking diverse outdoor experiences.

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

The chart illustrates May temperature patterns in Walnut, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Walnut, May typically has an average temperature of 17°C (62°F), with highs reaching up to 34°C (93°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec242740496273767368543932
Data source: Temperature data for Walnut 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 Walnut

In Walnut in May, the precipitation amount is 173 mm (6.8 in) occurring over 16 days.

May Precipitation Trends in Walnut

The chart displays monthly precipitation patterns in Walnut, 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 Walnut, May typically receives around 173 mm (6.8 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec586294114173146100681101275549
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Walnut

In Walnut in May humidity is 79%. With an average temperature of 17°C (62°F), this humidity feels like a warm blanket wrapping around you, making strolling through the streets a bit heavier but still comfortably refreshing for travelers.

May Average Humidity in Walnut

This chart illustrates the average monthly humidity levels in Walnut, 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 Walnut is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%83%84%85%79%82%80%81%80%82%88%84%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Walnut

In Walnut in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Walnut.

Maximum UV Index Levels in Walnut for May

The chart shows the monthly maximum UV Index (UVI) for Walnut 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 Walnut typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689101098642
Data source: Walnut 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 Walnut Compares to Other Months

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

This table compares monthly weather conditions in Walnut, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)58 mm (2.3 inches)82%moderate
February Weather-3°C (27°F)62 mm (2.5 inches)83%moderate
March Weather4°C (40°F)94 mm (3.7 inches)84%high
April Weather10°C (49°F)114 mm (4.5 inches)85%very high
May Weather17°C (62°F)173 mm (6.8 inches)79%very high
June Weather23°C (73°F)146 mm (5.7 inches)82%very high
July Weather24°C (76°F)100 mm (3.9 inches)80%very high
August Weather23°C (74°F)68 mm (2.7 inches)81%very high
September Weather20°C (69°F)110 mm (4.3 inches)80%very high
October Weather12°C (55°F)127 mm (5.0 inches)82%high
November Weather4°C (39°F)55 mm (2.2 inches)88%moderate
December Weather0°C (33°F)49 mm (1.9 inches)84%low

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