May Weather in Merced, United States

Last updated: June 24, 2025

In May, the average temperature in Merced, United States hovers around 22°C (72°F), making it a pleasant time to visit. However, be prepared for a range, as temperatures can dip to a minimum of 8°C (46°F) and soar to a maximum of 42°C (109°F). Expect around 23 mm (0.9 in) of precipitation over 3 days, coupled with an average humidity of 71%, creating a warm and inviting atmosphere.

May Temperature in Merced

In May in Merced, the average temperature is 22°C (72°F). Maximums can reach 42°C (109°F), while minimums can be as low as 8°C (46°F). Travelers should prepare for a wide range of temperatures, ensuring they have both light clothing for the heat and warmer layers for cooler nights.

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

The chart illustrates May temperature patterns in Merced, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Merced, May typically has an average temperature of 22°C (72°F), with highs reaching up to 42°C (109°F) and lows dropping to around 8°C (46°F).

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

May Precipitation in Merced

In Merced in May, the precipitation amount is 23 mm (0.9 in) over the course of 3 days.

May Precipitation Trends in Merced

The chart displays monthly precipitation patterns in Merced, 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 Merced, May typically receives around 23 mm (0.9 inches) of precipitation spread over approximately 3 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 Merced

In Merced in May humidity is 71%. With an average temperature of 22°C (72°F), this humidity feels like the air is thick and slightly stifling, making outdoor activities require frequent breaks to stay hydrated and cool.

May Average Humidity in Merced

This chart illustrates the average monthly humidity levels in Merced, 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 Merced is approximately 71%, 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 Merced

In Merced 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 Merced.

Maximum UV Index Levels in Merced for May

The chart shows the monthly maximum UV Index (UVI) for Merced 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 Merced typically reaches 10, which falls under the very high exposure category.

Data source: Merced 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 Merced Compares to Other Months

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

This table compares monthly weather conditions in Merced, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (51°F)	96 mm (3.8 inches)	82%	moderate
February Weather	12°C (53°F)	73 mm (2.9 inches)	84%	moderate
March Weather	14°C (57°F)	89 mm (3.5 inches)	82%	very high
April Weather	18°C (65°F)	28 mm (1.1 inches)	78%	very high
May Weather	22°C (72°F)	23 mm (0.9 inches)	71%	very high
June Weather	27°C (81°F)	1 mm (0.0 inches)	64%	extreme
July Weather	30°C (86°F)	0 mm (0.0 inches)	58%	extreme
August Weather	29°C (84°F)	0 mm (0.0 inches)	54%	very high
September Weather	26°C (78°F)	0 mm (0.0 inches)	55%	very high
October Weather	19°C (67°F)	17 mm (0.7 inches)	62%	high
November Weather	14°C (57°F)	31 mm (1.2 inches)	78%	moderate
December Weather	10°C (50°F)	83 mm (3.3 inches)	80%	moderate