May Weather in Katy, United States

Last updated: June 24, 2025

In Katy, United States, the average temperature in May hovers around 25°C (78°F). Expect a minimum of 11°C (51°F) and a maximum of 36°C (96°F) throughout the month. With an average precipitation of 165 mm (6.5 in) spread across 14 days, it's a good idea to carry an umbrella. Additionally, the air humidity averages a cozy 79%, making it feel quite warm and inviting.

May Temperature in Katy

In May in Katy, the average temperature is 25°C (78°F), with maximums reaching 36°C (96°F) and minimums dropping as low as 11°C (51°F). This pleasant climate makes Katy an ideal destination for travelers looking to enjoy a variety of outdoor activities.

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

The chart illustrates May temperature patterns in Katy, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Katy, May typically has an average temperature of 25°C (78°F), with highs reaching up to 36°C (96°F) and lows dropping to around 11°C (51°F).

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

May Precipitation in Katy

In Katy in May, the precipitation amount is 165 mm (6.5 in) spread over 14 days.

May Precipitation Trends in Katy

The chart displays monthly precipitation patterns in Katy, 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 Katy, May typically receives around 165 mm (6.5 inches) of precipitation spread over approximately 14 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 Katy

In Katy in May humidity is 79%. With an average temperature of 25°C (78°F), this humidity feels like a warm, heavy blanket enveloping you, making outdoor activities less inviting and requiring frequent breaks to stay refreshed.

May Average Humidity in Katy

This chart illustrates the average monthly humidity levels in Katy, 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 Katy is approximately 79%, 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 Katy

In Katy 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 Katy.

Maximum UV Index Levels in Katy for May

The chart shows the monthly maximum UV Index (UVI) for Katy 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 Katy typically reaches 11, which falls under the extreme exposure category.

Data source: Katy 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 Katy Compares to Other Months

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

This table compares monthly weather conditions in Katy, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (55°F)	81 mm (3.2 inches)	78%	moderate
February Weather	14°C (58°F)	92 mm (3.6 inches)	81%	very high
March Weather	19°C (66°F)	72 mm (2.8 inches)	76%	very high
April Weather	21°C (70°F)	80 mm (3.1 inches)	79%	extreme
May Weather	25°C (78°F)	165 mm (6.5 inches)	79%	extreme
June Weather	28°C (83°F)	156 mm (6.1 inches)	74%	extreme
July Weather	29°C (84°F)	125 mm (4.9 inches)	71%	extreme
August Weather	29°C (85°F)	167 mm (6.6 inches)	68%	extreme
September Weather	27°C (80°F)	157 mm (6.2 inches)	73%	very high
October Weather	22°C (72°F)	92 mm (3.6 inches)	75%	very high
November Weather	17°C (63°F)	75 mm (3.0 inches)	78%	high
December Weather	14°C (58°F)	106 mm (4.2 inches)	84%	moderate