May Weather in Lerma, Mexico

Last updated: August 27, 2025

In May, the average temperature in Lerma, Mexico is a warm 30°C (85°F). The weather can vary significantly, with minimums dropping to 19°C (67°F) and maximums soaring up to 40°C (104°F). Expect 34 mm (1.3 in) of precipitation over approximately 8 days, all while enjoying an average humidity of 59%. Stay prepared for a blend of heat and occasional rain!

May Temperature in Lerma

In May in Lerma, the average temperature is 30°C (85°F). Maximums can reach 40°C (104°F), while minimums can drop as low as 19°C (67°F). Be prepared for warm days and cooler evenings when planning your travel.

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

The chart illustrates May temperature patterns in Lerma, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lerma, May typically has an average temperature of 30°C (85°F), with highs reaching up to 40°C (104°F) and lows dropping to around 19°C (67°F).

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

May Precipitation in Lerma

In Lerma in May, the precipitation amount is 34 mm (1.3 in) over a span of 8 days.

May Precipitation Trends in Lerma

The chart displays monthly precipitation patterns in Lerma, 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 Lerma, May typically receives around 34 mm (1.3 inches) of precipitation spread over approximately 8 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 Lerma

In Lerma in May humidity is 59%. With an average temperature of 30°C (85°F), this humidity feels like a warm, enveloping blanket, making travel feel sticky and sultry, particularly during midday adventures, which can soon lead to a need for frequent breaks in the shade.

May Average Humidity in Lerma

This chart illustrates the average monthly humidity levels in Lerma, 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 Lerma is approximately 59%, 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 Lerma

In Lerma in May, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Lerma.

Maximum UV Index Levels in Lerma for May

The chart shows the monthly maximum UV Index (UVI) for Lerma 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 Lerma typically reaches 13, which falls under the extreme exposure category.

Data source: Lerma 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 Lerma Compares to Other Months

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

This table compares monthly weather conditions in Lerma, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	24°C (75°F)	18 mm (0.7 inches)	78%	very high
February Weather	26°C (78°F)	6 mm (0.2 inches)	73%	very high
March Weather	27°C (81°F)	4 mm (0.2 inches)	64%	extreme
April Weather	29°C (84°F)	14 mm (0.6 inches)	61%	extreme
May Weather	30°C (85°F)	34 mm (1.3 inches)	59%	extreme
June Weather	29°C (84°F)	205 mm (8.1 inches)	59%	extreme
July Weather	29°C (84°F)	87 mm (3.4 inches)	64%	extreme
August Weather	28°C (84°F)	126 mm (5.0 inches)	76%	extreme
September Weather	28°C (83°F)	135 mm (5.3 inches)	80%	extreme
October Weather	27°C (82°F)	140 mm (5.5 inches)	82%	extreme
November Weather	25°C (78°F)	40 mm (1.6 inches)	83%	very high
December Weather	24°C (76°F)	21 mm (0.8 inches)	84%	very high