Charleston UV index in September
Typical ultraviolet levels for Charleston during September, from the past year of data.
Very High
Charleston
Very high UV. Limit sun exposure, especially during midday; protective clothing, sunscreen, and a hat are essential.
8.8
UV Index
September average UTC
Low
Moderate
High
Very High
Extreme
September UV
8.8336
Risk level
Very High
Yearly peak
10.9387
Peak month
July
Charleston UV index — monthly trend
Average UV index by month over the past year, with September highlighted.
Visiting Charleston in September?
In September, Charleston's typical UV index is about 8.8336 — a very high risk level. Very high UV. Limit sun exposure, especially during midday; protective clothing, sunscreen, and a hat are essential.
Across the year, Charleston sees the strongest UV in Summer, peaking around 10.9387 in July. Plan sun protection accordingly.
