Our weather and climate analysis offers a detailed understanding of average weather patterns for locations across the globe. Derived from 26 years of historical simulated weather data from ECMWF, it provides valuable insights into typical weather conditions, including air temperature, humidity, precipitation, cloud cover and wind. It is important to note the data is not observational, but rather derived from climate reanalysis.
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United States > Houston, TX > Overview
Discover if upcoming months are expected to be warmer, colder, wetter, or drier than average
What is the best time to visit Houston to enjoy the optimal weather conditions?
This quick reference weather table contains a summary of the annual climate trends in Houston. It contains key metrics, including average monthly high & low temperatures, rainfall, humidity and UV index. The data is presented on a monthly basis, allowing you to see how each these weather components change throughout the year.
Houston's long-term climate patterns earn these Weather Badges.
Explore the most extreme weather events in Houston over the past 26 years, including record highs and lows for temperatures, rainfall, and wind speeds. This data is sourced from the latest ERA5 reanalysis model spanning 2000 to 2025.
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Weather guides, climate insights, and travel planning stories that talk about Houston.
Houston is defined by a humid subtropical climate characterized by sweltering summers and generally mild winters. WeatherBox data shows that during the hottest period, usually August, the average daily high reaches 34.0°C (93.2°F), creating an oppressive heat. This intensity is amplified by significant moisture levels, with relative humidity peaking at 74.9. Extreme heat waves are common, where temperatures can climb to rarely exceeded highs of 37.2°C (99.0°F). The combination of high temperatures and atmospheric moisture results in heavy humidity, which remains a persistent feature throughout the warmest months.
In contrast to the intense summer season, the cooler months offer temperate conditions. The coldest month is typically January, where average daily lows settle around 6.9°C (44.4°F). While hard freezes are infrequent, they are possible; data indicates temperatures rarely fall below 0.1°C (32.2°F). The annual thermal profile shifts significantly, with a mean variation of 16.9°C (30.4°F) between the seasonal extremes. Residents experience a short winter, with average temperatures during this season hovering near 13.1°C (55.6°F), providing substantial relief from the earlier heat.
Rainfall is abundant throughout the year, with an annual total of 1,204 mm (47 in). The wettest period peaks in September with 116 mm (5 in) of precipitation, often resulting in heavy downpours. Despite the rain, the city receives substantial light, recording 304.0 of sunshine during peak months. However, this sun brings exposure risks, as the average peak UV Index is 8.8. Air movement is consistent, with a prevailing wind blowing from the SSE roughly 16.1 of the time. Explore the advanced weather charts on WeatherBox to visualize these patterns in greater detail.