May Weather in San Antonio, Belize

Last updated: August 22, 2025

In San Antonio, Belize, the average temperature in May hovers around 28°C (82°F), with minimums dipping to 21°C (70°F) and maximums soaring to 38°C (101°F). Expect 106 mm (4.2 in) of precipitation spread over 21 days, accompanied by an average humidity of 62%. Prepare for a warm and somewhat wet month!

May Temperature in San Antonio

In May in San Antonio, the average temperature is 28°C (82°F), with maximums reaching 38°C (101°F) and minimums dropping to as low as 21°C (70°F). This makes it a great time for travelers looking to enjoy warm weather and outdoor activities.

May Weather in San Antonio: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in San Antonio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Antonio, May typically has an average temperature of 28°C (82°F), with highs reaching up to 38°C (101°F) and lows dropping to around 21°C (70°F).
JanFebMarAprMayJunJulAugSepOctNovDec737577808281818181797674
Data source: Temperature data for San Antonio 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 San Antonio

In San Antonio in May, the precipitation amount is 106 mm (4.2 in) during a span of 21 days.

May Precipitation Trends in San Antonio

The chart displays monthly precipitation patterns in San Antonio, 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 San Antonio, May typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 21 days.
JanFebMarAprMayJunJulAugSepOctNovDec6850655710617212213013921913965
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in San Antonio

In San Antonio in May, humidity is 62%. With an average temperature of 28°C (82°F), this humidity feels like walking through a warm, dense fog, making outdoor activities a bit more challenging but still enjoyable for those who appreciate the tropical atmosphere.

May Average Humidity in San Antonio

This chart illustrates the average monthly humidity levels in San Antonio, 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 San Antonio is approximately 62%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%78%67%62%62%63%66%73%82%86%87%88%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in San Antonio

In San Antonio in May, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in San Antonio, you can check here.

Maximum UV Index Levels in San Antonio for May

The chart shows the monthly maximum UV Index (UVI) for San Antonio 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 San Antonio typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10121414141313141312109
Data source: San Antonio 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 San Antonio Compares to Other Months

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

This table compares monthly weather conditions in San Antonio, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather23°C (73°F)68 mm (2.7 inches)85%very high
February Weather24°C (76°F)50 mm (2.0 inches)78%extreme
March Weather25°C (77°F)65 mm (2.5 inches)67%extreme
April Weather27°C (81°F)57 mm (2.3 inches)62%extreme
May Weather28°C (82°F)106 mm (4.2 inches)62%extreme
June Weather27°C (81°F)172 mm (6.8 inches)63%extreme
July Weather27°C (81°F)122 mm (4.8 inches)66%extreme
August Weather27°C (81°F)130 mm (5.1 inches)73%extreme
September Weather27°C (81°F)139 mm (5.5 inches)82%extreme
October Weather26°C (79°F)219 mm (8.6 inches)86%extreme
November Weather24°C (76°F)138 mm (5.5 inches)87%very high
December Weather23°C (74°F)65 mm (2.6 inches)87%very high

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