UV Index
UV Index
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Today's UV index in Portland, United States 
will be up to 5.4, 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 5.4 in Portland, 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 Portland, USA, typically ranges from 2 in winter to 8 in summer, reaching its peak in July. This suggests that while some UV protection is necessary during summer months, the risk is much lower in the winter.
Portland experiences four distinct seasons. Winters are rainy and mild with average temperatures around 40°F (4°C), while summers are dry and warm with highs around 80°F (27°C). Spring and autumn are damp and cool transitions between the two.
Compared to its region and neighboring countries, Portland is relatively mild. It receives less rainfall than Seattle and has a more temperate climate than Vancouver, BC. Winters are warmer than those in many Canadian cities, and summers are cooler than those in nearby California.
The chart below displays the average Shortwave Radiation Sum (MJ/m²) for each month of the last year in Portland. It's designed to provide you with a better understanding of the yearly weather and sun exposure.