Houston weather in May
In May, Houston has an average high of 31 °C87 °F and an average low of 19 °C67 °F, with about 119 mm4.7 in of precipitation. It is the 5th warmest month of the year and ranks 4th for precipitation.
How May compares with other months
Compared with April, May is 4.2 °C7.6 °F warmer on average and wetter by 32 mm1.2 in. Compared with June, May is 3.3 °C6 °F cooler on average and drier by 7 mm0.3 in. Daylight lasts about 13.6 hours around the middle of the month. Average relative humidity is 74% and the average cloud amount 51%.
Is May a good time to visit Houston?
May is not among the most comfortable months by our comfort score: it is hot (average high 31 °C87 °F) and it is fairly wet (119 mm4.7 in). The most comfortable months in Houston are February–April and November.
What to wear in May
For Houston in May, pack very light, breathable clothing, a sun hat and plenty of water and an umbrella or light rain jacket.
May in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Houston | 3187 | 1967 | 1194.7 |
| Pasadena | 2883 | 2171 | 1234.8 |
| Beaumont | 3085 | 2068 | 1254.9 |
| College Station | 3086 | 1865 | 1194.7 |
| Austin | 3187 | 1965 | 1114.4 |
| Waco | 2985 | 1864 | 1134.5 |
| Killeen | 3085 | 1864 | 1094.3 |
| Tyler | 2883 | 1763 | 1194.7 |
| Corpus Christi | 3188 | 2171 | 803.1 |
Nearby places that are more than 1 °C1.8 °F warmer in May: Corpus Christi; cooler: Waco, Killeen and Tyler.
Other months in Houston
- January16 °C61 °F / 5 °C41 °F
- February19 °C65 °F / 7 °C45 °F
- March23 °C73 °F / 11 °C52 °F
- April26 °C80 °F / 15 °C59 °F
- May31 °C87 °F / 19 °C67 °F
- June34 °C92 °F / 23 °C73 °F
- July34 °C93 °F / 24 °C75 °F
- August35 °C94 °F / 24 °C75 °F
- September32 °C89 °F / 21 °C70 °F
- October28 °C82 °F / 16 °C60 °F
- November22 °C72 °F / 10 °C51 °F
- December18 °C64 °F / 6 °C43 °F
Frequently asked questions
How warm is Houston in May?
In May the average high in Houston is 31 °C (87 °F) and the average low is 19 °C (67 °F).
Does it rain a lot in Houston in May?
On average about 119 mm (4.7 in) of precipitation falls in May; it ranks 4th of the 12 months.
Is May the warmest month in Houston?
No. The warmest month in Houston is August, with an average high of 35 °C (94 °F). The coldest month is January, with an average low of 5 °C (41 °F).
How long is the day in Houston in May?
In the middle of May the day in Houston lasts about 13.6 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Houston in May?
The average relative humidity in May is about 74%. Combined with warm days, it can feel muggy.
How cloudy is Houston in May?
On average about 51% of the sky is covered by cloud in May. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.