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May Weather in Houston, United States

Last updated: June 24, 2025

In May, the average temperature in Houston, United States is a pleasant 22°C (73°F). However, you might experience a minimum of 6°C (43°F) and a maximum of 35°C (95°F)—perfect for those who enjoy a bit of variability! Expect about 120 mm (4.7 in) of precipitation spread over 11 days, and don’t forget that the average humidity sits at a warm 82%, adding to the overall atmosphere of the season.

May Temperature in Houston

In May in Houston, the average temperature is 22°C (73°F). Maximum temperatures can reach 35°C (95°F), while minimums can drop as low as 6°C (43°F). Travelers should be prepared for a range of temperatures, making layering a smart choice for outdoor activities.

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

The chart illustrates May temperature patterns in Houston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Houston, May typically has an average temperature of 22°C (73°F), with highs reaching up to 35°C (95°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec455057627278818077665249
Data source: Temperature data for Houston 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 Houston

In Houston in May, the precipitation amount is 120 mm (4.7 in) during a span of 11 days.

May Precipitation Trends in Houston

The chart displays monthly precipitation patterns in Houston, 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 Houston, May typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec1281871631531201311031279211375138
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Houston

In Houston in May, humidity is 82%. With an average temperature of 22°C (73°F), this humidity feels like a warm, heavy embrace, making traveling feel sticky and draining, but the tropical atmosphere also brings a lush vibrancy to the surroundings.

May Average Humidity in Houston

This chart illustrates the average monthly humidity levels in Houston, 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 Houston is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%82%82%82%79%82%77%74%73%85%88%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Houston

In Houston in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Houston.

Maximum UV Index Levels in Houston for May

The chart shows the monthly maximum UV Index (UVI) for Houston 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 Houston typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47810111111109764
Data source: Houston 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 Houston Compares to Other Months

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

This table compares monthly weather conditions in Houston, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (45°F)128 mm (5.0 inches)85%moderate
February Weather10°C (50°F)187 mm (7.4 inches)84%high
March Weather14°C (58°F)163 mm (6.4 inches)82%very high
April Weather17°C (63°F)153 mm (6.0 inches)82%very high
May Weather22°C (73°F)120 mm (4.7 inches)82%extreme
June Weather26°C (79°F)131 mm (5.2 inches)79%extreme
July Weather27°C (82°F)103 mm (4.1 inches)82%extreme
August Weather27°C (81°F)127 mm (5.0 inches)77%very high
September Weather25°C (77°F)92 mm (3.6 inches)74%very high
October Weather19°C (66°F)113 mm (4.4 inches)73%high
November Weather11°C (52°F)75 mm (3.0 inches)85%high
December Weather9°C (49°F)138 mm (5.4 inches)88%moderate

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