Washington UV index in September
Typical ultraviolet levels for Washington during September, from the past year of data.
High
Washington
High UV. Avoid the sun during peak hours and wear protective clothing, sunscreen, and a hat.
7.8
UV Index
September average UTC
Low
Moderate
High
Very High
Extreme
September UV
7.7807
Risk level
High
Yearly peak
10.4328
Peak month
July
Washington UV index — monthly trend
Average UV index by month over the past year, with September highlighted.
Visiting Washington in September?
In September, Washington's typical UV index is about 7.7807 — a high risk level. High UV. Avoid the sun during peak hours and wear protective clothing, sunscreen, and a hat.
Across the year, Washington sees the strongest UV in Summer, peaking around 10.4328 in July. Plan sun protection accordingly.
