Mercer Island UV Index Today
- Current UV Index5.0
- Peak UV Index7.0
- Temperature22.5 ℃
- Peak UV at 1 PM
- Protection Recommended ☀️
Last updated:
The UV index in Mercer Island, Washington, United States 
will reach a high of 5 today. This means a normal level of sun exposure. See our tips below to stay safe!
Hourly Forecast Chart
Today's Safety Tips
Check the live data above for the current conditions and stay safe in the sun!
Mercer Island's UV Index
The UV index in Mercer Island, Washington, ranges from low to moderate throughout the year, typically highest in summer months. It rarely reaches extreme levels due to the region's northern latitude and frequent cloud cover.
Weather Seasons
Mercer Island experiences mild, wet winters and warm, dry summers. Rain is common from late fall through early spring. Summer temperatures are comfortable, usually in the 70s to 80s Fahrenheit, with occasional heatwaves.
Mercer Island's Climate
Compared to other parts of Washington, Mercer Island is slightly milder due to its location near Lake Washington. It receives less rain than the western coastal areas but more than eastern Washington. Neighboring Seattle shares similar weather patterns.
Hourly UV Index Trend
See the UV index hour by hour for Mercer Island. When the level is high, it's smart to find some shade.
- TimeUVLevelTemp
- 12 PM5.0moderate22 ℃
Nearby Cities
Check the UV index in other cities near Mercer Island.
