Houston Weather in May

Hot weather begins to appear at Houston, Texas in May. There's more sun now than earlier in the year, but there's also more rain.

This page gives detailed information on the typical May weather for Houston. You can jump directly to data and descriptions for:

The numbers here are historical averages based on climate data gathered at the George Bush Intercontinental Airport, located north of downtown Houston.

Temperature

86 °F	May average high	30 °C
68 °F	May average low	20 °C

In most years, Houston averages a daily maximum temperature for May that's between 84 and 88 degrees Fahrenheit (29 to 31 degrees Celsius). The minimum temperature usually falls between 65 and 70 °F (19 to 21 °C).

The days at Houston warm rapidly during May. By the end of the month, the temperature has climbed around 7 °F (4 °C) above what it was at the start.

7 days	90 °F maximum or above (32 °C)
19 days	70 °F minimum or below (21 °C)

The temperature rises most days in May to over 80 °F (27 °C) at Houston. Temperatures above 100 °F (38 °C) are not expected here this month.

The thermometer dips to 60 °F (16 °C) or below on an average of 4 nights. But most years May doesn't get as cold as 50 °F (10 °C).

Rain

5.1 inches	total May precipitation	129 millimetres
8 days	of rain

Half the time, Houston receives 2 to 7 inches (57 to 185 mm) of rainfall in May. One in four years has drier weather, while another one in four is wetter.

Sun

62 %	sunshine in May
6 days	with clear skies

The sun's rays reach the ground in Houston during 62 percent of daylight hours on average in May, for a total of 262 hours in the month. Typically on 6 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in May at Houston lasts for 13 hours and 39 minutes a day on average. The shortest day of the month is the 1st with 13 hours and 20 minutes of daylight. By the end of the month, the days have lengthened to 13:55 from sunrise to sunset. These durations can vary by a minute or two from year to year.

Humidity

75 %	May average humidity

The relative humidity in Houston during May usually peaks at 91 percent in the morning then drops to 57 percent by mid afternoon.

Local Time	12 am	3 am	6 am	9 am	12 pm	3 pm	6 pm	9 pm
Humidity %	87	90	91	73	59	57	63	80

Wind

8.2 mph

May wind speed average

13.2 kph

May is windier than most other months at Houston.

Storms

3 days	rainfall of 0.5 inches (13 mm) or more
7 days	with thunderstorms in May