UV Index
UV Index
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Today's UV index in Indianapolis, 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 Indianapolis, 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 Indianapolis can reach a high of 9 during summer months, indicating a very high risk of harm from the sun's rays. However, from November through February, the UV index remains at a low level, usually below 2.
Indianapolis experiences all four seasons distinctly. Spring brings unpredictable weather with a mix of warm and cool temperatures. Summers are hot and humid, with occasional heavy thunderstorms. Autumn presents crisp, cooler air and vibrant fall foliage. Winters are cold and snowy, with temperatures often below freezing.
Compared to its region and neighboring countries, Indianapolis' weather is relatively mild. Although it gets cold in winter, the city rarely experiences extreme cold or heavy snowfall compared to northern states or Canada. Summers can be hot and humid, but they are not as extreme as in southern states or Mexico. Overall, Indianapolis' weather is typical of the Midwest, with a mix of all four seasons.
The chart below displays the average Shortwave Radiation Sum (MJ/m²) for each month of the last year in Indianapolis. It's designed to provide you with a better understanding of the yearly weather and sun exposure.