Houston
Texas, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Houston, TX

A beautiful park in Root square overlooking the central business district of Houston, Texas
A beautiful park in Root square overlooking the central business district of Houston, Texas
May is a wet month during the spring season of Houston with the rainfall registering 5.1" (129.5mm). Despite the rain, the sun shines for 250 hours, as the heavy rains occur for eight rainy days during the month.
The latter part of the spring is hot with the average high temperatures in the 68°F (20°C) to 86°F (30°C) range. The average humidity is 75%, with the humidity above 80% in the mornings. May witnesses occasional thunderstorms accompanied by lightning and rain. The weather is a little unpredictable in late spring, but the days are long, and evenings cool down gradually.

What is the temperature in May in Houston?

In May, in Houston, Texas, the average high-temperature is 86.4°F (30.2°C), and the average low-temperature is 67.6°F (19.8°C).

What is the average humidity in May in Houston?

The average relative humidity in May in Houston, Texas, is 75%.

How many days does it rain in May in Houston?

In Houston, Texas, in May, during 8 rainfall days, 5.1" (129.3mm) of precipitation is typically accumulated.

What is the average length of the day in May in Houston?

In Houston, the average length of the day in May is 13.7h.

How many hours of sunshine does Houston have in May?

In May, the average sunshine in Houston is 8h.

How high is the UV index in May in Houston?

The average daily maximum UV index in May in Houston is 10. A UV Index value of 8 to 10 symbolizes a very high hazard to health from the exposure to the Sun's UV rays.
Average temperature in May - Houston, TX
  • Average high temperature in May: 86.3°F

The warmest month (with the highest average high temperature) is August (94.5°F).
The month with the lowest average high temperature is January (62.9°F).

  • Average low temperature in May: 67.6°F

The month with the highest average low temperature is July (75.1°F).
The coldest month (with the lowest average low temperature) is January (43.2°F).

Average humidity in May - Houston, TX
  • Average humidity in May: 75%

The month with the highest relative humidity is September (76.8%).
The month with the lowest relative humidity is March (72.7%).

Average rainfall in May - Houston, TX
  • Average rainfall in May: 5.1"

The wettest month (with the highest rainfall) is June (5.9").
The driest month (with the lowest rainfall) is February (3.2").

Average rainfall days in May - Houston, TX
  • Average rainfall days in May: 8 days

The month with the highest number of rainy days is June (10.6 days).
The month with the lowest number of rainy days is April (6.8 days).

Average daylight in May / Average sunshine in May - Houston, TX
  • Average daylight in May: 13.7h

The month with the longest days is June (Average daylight: 14h).
The month with shortest days is December (Average daylight: 10.3h).

  • Average sunshine in May: 8h

The month with most sunshine is July (Average sunshine: 9.5h).
The month with least sunshine is January (Average sunshine: 4.6h).

Average UV index in May - Houston, TX
  • Average UV index in May: 10

Months with the highest UV index are June and July (UV index 11).
Months with the lowest UV index are January and December (UV index 4).