Houston Weather in May
May in Houston averages 30°C (86°F) during the day and 21°C (70°F) at night. Quite a bit of rainfall is typical this month, with around 161 mm (6.3 in) on average. An umbrella is a good idea.
Rainfall in Houston in May
The climate data from previous years indicates about 9 days of rain, averaging 161 mm (6.3 in) for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Houston in May
In May, Houston sees high temperatures, with highs of 30°C (86°F). Nights drop to around 21°C (70°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights are mild at around 21°C (70°F), which is comfortable for most people.
Sunshine in Houston in May
Enjoy a sunny month with about 250 hours of sunshine, the clear skies make Houston even more beautiful.
Wind Speed in Houston in May
May has wind speeds averaging 3 m/s (6 knots). You can expect comfortable light winds that steadily move flags and feel mild throughout the day. Since this is an average, daily conditions vary from gentle winds to more active breezes.Should you favor a climate that's both dry and comfortably warm, March typically offers the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Houston's climate page.
Houston Temperature in May
Min Temperature
21°C (70°F)
Max Temperature
30°C (86°F)
Chance of Rain
31%
Precipitation
161 mm (6.3 in)
Rainy days
9 days
Humidity
75%
Windspeed
3 m/s (6 knots)
Sunshine
250 hours
Percentage Sunshine
59%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Houston typically rise from around 28°C (82°F) at the start of May to approximately 31°C (88°F) by the end. Nights are warm, with lows typically ranging from 18°C (64°F) to 22°C (72°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Houston in May
Browse day-by-day weather records for Houston spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Houston historical weather extremes in May
Based on 50 years of weather observations in Houston between 1976 and 2026, these are the recorded extremes.
- On May 29, 2012, temperatures climbed to 37°C (99°F), marking the warmest May day on record.
- The lowest daytime temperature in May was 17°C (63°F), recorded on May 3, 1978.
- The lowest overnight temperature recorded in May was 7°C (45°F) (May 4, 1978).
Best Places in the United States of America in May
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in May →
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What to Wear in Houston in May
Warm weather calls for comfortable, breathable clothing in May. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Houston in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Houston's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Houston climate overview or explore weather in the United States of America.
