Hillsboro UV Index Today
- Current UV Index0.0
- Cloud Cover00%
- Temperature00.0 ℃
Day Summary
- Max UV Index8.1
- Avg Clouds68%
- Max Temp29.3 ℃
- Peak UV at 1 PM
- Protection Required ☀️
The UV index in Hillsboro, United States 
will reach a high of 8.1 today. This means a veryhigh level of sun exposure. See our tips below to stay safe!
Last checked: 2025-08-01
Hourly Forecast Chart
Today's Safety Tips
The risk is very high. It's best to stay out of the sun between 10 a.m. and 4 p.m. If you must be outside, wear protective clothing and apply sunscreen often.
Hillsboro's UV Index
The UV index in Hillsboro, United States, varies throughout the year, generally ranging from low to moderate levels, with higher values during summer months. Peaks can reach up to 8 or 9 in the hottest months.
Weather Seasons
Hillsboro experiences mild, wet winters and warm, dry summers. Rain is common from October to April, while July and August are the driest and sunniest. Temperatures rarely drop below freezing in winter and often reach the 80s Fahrenheit in summer.
Hillsboro's Climate
Compared to nearby Portland and the broader Pacific Northwest, Hillsboro has a similar climate with slightly more sunshine in summer. It is wetter and cooler than many parts of California to the south but milder than the inland areas east of the Cascade Mountains.
Hourly UV Index Trend
See the UV index hour by hour for Hillsboro. When the level is high, it's smart to find some shade.
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