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). You can expect a wide temperature range, with minimums dipping to 2°C (36°F) and maximums soaring to 35°C (96°F). During this month, the region experiences about 157 mm (6.2 in) of precipitation spread over 16 days, resulting in an average humidity of 78%.

May Temperature in Walnut

In May in Walnut, the average temperature is 17°C (62°F). Maximum temperatures can reach 35°C (96°F), while minimums can drop as low as 2°C (36°F). Be sure to pack both light clothing for the warm days and warmer layers for the cooler nights when traveling during this time.

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 35°C (96°F) and lows dropping to around 2°C (36°F).

Data source: Temperature data for Walnut generated using information from the Copernicus Climate Change Service.

May Precipitation in Walnut

In Walnut in May, the total precipitation amount is 157 mm (6.2 in) spread 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 157 mm (6.2 inches) of precipitation spread over approximately 16 days.

Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

May Humidity in Walnut

In Walnut in May, humidity is 78%. With an average temperature of 17°C (62°F), this humidity feels like a warm, enveloping blanket, making travel feel a bit sticky and heavy but also refreshing, as long as you're prepared with light clothing and plenty of water.

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 78%, offering insight into how humid the weather typically is during this month.

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 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more 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 10, which falls under the very high exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (24°F)	30 mm (1.2 inches)	76%	moderate
February Weather	-4°C (24°F)	36 mm (1.4 inches)	80%	moderate
March Weather	4°C (40°F)	86 mm (3.4 inches)	73%	high
April Weather	9°C (49°F)	57 mm (2.3 inches)	74%	very high
May Weather	17°C (62°F)	157 mm (6.2 inches)	78%	very high
June Weather	24°C (75°F)	109 mm (4.3 inches)	82%	extreme
July Weather	25°C (77°F)	68 mm (2.7 inches)	83%	very high
August Weather	23°C (74°F)	108 mm (4.3 inches)	80%	very high
September Weather	20°C (69°F)	98 mm (3.8 inches)	75%	very high
October Weather	11°C (52°F)	128 mm (5.0 inches)	75%	high
November Weather	4°C (39°F)	34 mm (1.3 inches)	82%	moderate
December Weather	-1°C (31°F)	36 mm (1.4 inches)	83%	moderate