UV index in Seattle today
Live UV level in Seattle, Washington right now, today's hourly forecast, and how long until your skin type burns.
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| Hour | UV index | Level |
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When is UV highest in Seattle?
UV peaks around solar noon — roughly 12–2pm local time. Seasonally, UV in Seattle peaks May through September. In that peak period, summer UV in Seattle typically peaks in the high to very high range (6–9) around midday.
In December and January, UV in Seattle usually stays in the low range, and sunburn risk is minimal outside of snow-reflection or high-altitude situations.
Do I need sunscreen in Seattle today?
Use the live reading above: the protection threshold is UV 3. If any part of your time outdoors falls in the hours marked moderate or higher, wear SPF 30+ broad-spectrum sunscreen and reapply every two hours. Water, sand, and snow reflect UV and can push your effective exposure well above the forecast number — as does altitude, at roughly +10% per 1,000 m.