May Weather in Round Rock, United States

Last updated: June 24, 2025

In May, the average temperature in Round Rock, United States hovers around 17°C (63°F). Expect a wide range, with the minimum dipping to 0°C (32°F) and the maximum soaring to 32°C (90°F). During this month, anticipate approximately 14 mm (0.6 in) of precipitation spread over 3 days, while the air carries an average humidity of 53%.

May Temperature in Round Rock

In May in Round Rock, the average temperature is 17°C (63°F). The maximum can reach 32°C (90°F) and the minimum can be as low as 0°C (32°F). It's a great time to explore Round Rock, so be prepared for both warm days and cool nights.

May Weather in Round Rock: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Round Rock, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Round Rock, May typically has an average temperature of 17°C (63°F), with highs reaching up to 32°C (90°F) and lows dropping to around 0°C (32°F).

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

May Precipitation in Round Rock

In Round Rock in May, the precipitation amount is 14 mm (0.6 in) accumulated over the course of 3 days.

May Precipitation Trends in Round Rock

The chart displays monthly precipitation patterns in Round Rock, 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 Round Rock, May typically receives around 14 mm (0.6 inches) of precipitation spread over approximately 3 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 Round Rock

In Round Rock in May humidity is 53%. With an average temperature of 17°C (63°F), this humidity feels like a refreshing embrace, making it comfortable for sightseeing and outdoor adventures, yet a light jacket may be a welcome companion as you explore.

May Average Humidity in Round Rock

This chart illustrates the average monthly humidity levels in Round Rock, 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 Round Rock is approximately 53%, 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 Round Rock

In Round Rock in May, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Round Rock.

Maximum UV Index Levels in Round Rock for May

The chart shows the monthly maximum UV Index (UVI) for Round Rock 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 Round Rock typically reaches 12, which falls under the extreme exposure category.

Data source: Round Rock 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 Round Rock Compares to Other Months

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

This table compares monthly weather conditions in Round Rock, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (33°F)	22 mm (0.9 inches)	85%	moderate
February Weather	3°C (38°F)	22 mm (0.9 inches)	86%	high
March Weather	8°C (46°F)	31 mm (1.2 inches)	76%	very high
April Weather	13°C (55°F)	10 mm (0.4 inches)	69%	extreme
May Weather	17°C (63°F)	14 mm (0.6 inches)	53%	extreme
June Weather	24°C (76°F)	3 mm (0.1 inches)	40%	extreme
July Weather	26°C (80°F)	14 mm (0.5 inches)	36%	extreme
August Weather	25°C (78°F)	4 mm (0.2 inches)	44%	extreme
September Weather	21°C (69°F)	12 mm (0.5 inches)	59%	extreme
October Weather	12°C (54°F)	21 mm (0.8 inches)	74%	very high
November Weather	7°C (44°F)	10 mm (0.4 inches)	83%	high
December Weather	1°C (34°F)	22 mm (0.8 inches)	85%	moderate