UV Index
UV Index
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Today's UV index in Houston, United States 
will be up to 4.5, indicating a moderate level of sun exposure for the average person. Check the annual sun radiation in the city and our tips for today to make sure you're safe in the sun.
With a UV index reaching up to 4.5 in Houston, stay shaded during midday when the sun is strongest; wear protective clothing, a wide-brimmed hat, UV-blocking sunglasses; apply SPF 30+ sunscreen every 2 hours, even on cloudy days; and be cautious of heightened UV on bright surfaces.
The UV index in Houston can reach high levels, especially during the summer months. It's important to be aware of the UV index and take appropriate precautions to protect yourself from excessive sun exposure.
Houston has a humid subtropical climate, with hot, humid summers and mild winters. The city experiences two main seasons: a long, hot summer and a short, mild winter. Spring and fall are typically warm and pleasant, but can be prone to heavy rainfall.
Compared to its region and neighboring countries, Houston is generally warmer and more humid. The city's proximity to the Gulf of Mexico contributes to its high humidity and mild winters. In contrast, neighboring states like Oklahoma and Arkansas have more extreme temperature ranges and less humidity.
The chart below displays the average Shortwave Radiation Sum (MJ/m²) for each month of the last year in Houston. It's designed to provide you with a better understanding of the yearly weather and sun exposure.