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May Weather in Walnut, United States

Last updated: June 24, 2025

In May, the average temperature in Walnut, United States hovers around 22°C (71°F). However, temperatures can fluctuate significantly, ranging from a chilly 5°C (41°F) to a sweltering 36°C (96°F). Expect 109 mm (4.3 in) of precipitation spread over about 12 days, accompanied by a cozy average humidity of 83%.

May Temperature in Walnut

In May in Walnut, the average temperature is 22°C (71°F). The maximum can reach 36°C (96°F), and the minimum can be as low as 5°C (41°F). This makes it a great time for travelers to experience pleasant weather while being prepared for both warmth and cooler evenings.

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 22°C (71°F), with highs reaching up to 36°C (96°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec424655607178817975645047
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 total precipitation amount is 109 mm (4.3 in) during a span of 12 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 109 mm (4.3 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec10717615714810911213111612211379147
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 83%. With an average temperature of 22°C (71°F), this humidity feels like a warm blanket wrapping around you, making travel a bit sticky but still enjoyable, as long as you stay hydrated and take breaks in the shade.

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 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%84%81%83%83%80%74%70%73%85%88%
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 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 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 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109753
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 Weather6°C (43°F)107 mm (4.2 inches)86%moderate
February Weather8°C (47°F)176 mm (6.9 inches)85%high
March Weather13°C (55°F)157 mm (6.2 inches)84%very high
April Weather16°C (61°F)148 mm (5.8 inches)81%very high
May Weather22°C (71°F)109 mm (4.3 inches)83%extreme
June Weather26°C (78°F)112 mm (4.4 inches)83%extreme
July Weather27°C (81°F)131 mm (5.2 inches)80%extreme
August Weather26°C (79°F)116 mm (4.6 inches)73%very high
September Weather24°C (76°F)122 mm (4.8 inches)70%very high
October Weather18°C (65°F)113 mm (4.4 inches)73%high
November Weather10°C (50°F)79 mm (3.1 inches)85%moderate
December Weather8°C (47°F)147 mm (5.8 inches)88%moderate

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