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
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.
