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May Weather in Rio Grande, United States

Last updated: June 24, 2025

In May, the average temperature in Rio Grande, United States is a pleasant 19°C (66°F). Daytime highs can reach up to 32°C (91°F), while nights may drop to a chilly 1°C (34°F). Expect about 128 mm (5.1 in) of precipitation spread over 14 days, creating a humid atmosphere with an average humidity level of 81%.

May Temperature in Rio Grande

In May in Rio Grande, the average temperature is 19°C (66°F), with maximums reaching up to 32°C (91°F) and minimums dropping as low as 1°C (34°F). This diverse temperature range makes Rio Grande an ideal destination for travelers looking to enjoy both warm days and cool evenings.

May Weather in Rio Grande: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Rio Grande, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio Grande, May typically has an average temperature of 19°C (66°F), with highs reaching up to 32°C (91°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec343946556573787570594539
Data source: Temperature data for Rio Grande 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 Rio Grande

In Rio Grande in May, the precipitation amount is 128 mm (5.1 in) spread over 14 days.

May Precipitation Trends in Rio Grande

The chart displays monthly precipitation patterns in Rio Grande, 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 Rio Grande, May typically receives around 128 mm (5.1 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec8712711113312914311011910110881117
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Rio Grande

In Rio Grande in May, humidity is 81%. With an average temperature of 19°C (66°F), this humidity feels like a warm, heavy blanket enveloping you, making travel feel both muggy and slightly stifling, often leading to a need for frequent breaks in the shade.

May Average Humidity in Rio Grande

This chart illustrates the average monthly humidity levels in Rio Grande, 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 Rio Grande is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%85%81%82%81%73%73%78%89%87%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Rio Grande

In Rio Grande 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 Rio Grande.

Maximum UV Index Levels in Rio Grande for May

The chart shows the monthly maximum UV Index (UVI) for Rio Grande 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 Rio Grande typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098643
Data source: Rio Grande 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 Rio Grande Compares to Other Months

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

This table compares monthly weather conditions in Rio Grande, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (35°F)87 mm (3.4 inches)88%moderate
February Weather4°C (39°F)127 mm (5.0 inches)88%moderate
March Weather8°C (46°F)111 mm (4.4 inches)87%high
April Weather13°C (55°F)133 mm (5.2 inches)85%very high
May Weather19°C (66°F)128 mm (5.1 inches)81%very high
June Weather23°C (73°F)143 mm (5.6 inches)82%very high
July Weather25°C (78°F)109 mm (4.3 inches)81%very high
August Weather24°C (75°F)119 mm (4.7 inches)73%very high
September Weather21°C (71°F)101 mm (4.0 inches)73%very high
October Weather15°C (60°F)108 mm (4.3 inches)78%high
November Weather7°C (45°F)81 mm (3.2 inches)89%moderate
December Weather4°C (39°F)117 mm (4.6 inches)87%moderate

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