San Antonio UV index in September
Typical ultraviolet levels for San Antonio during September, from the past year of data.
Very High
San Antonio
Very high UV. Limit sun exposure, especially during midday; protective clothing, sunscreen, and a hat are essential.
10.6
UV Index
September average UTC
Low
Moderate
High
Very High
Extreme
September UV
10.5569
Risk level
Very High
Yearly peak
12.6002
Peak month
July
San Antonio UV index — monthly trend
Average UV index by month over the past year, with September highlighted.
Visiting San Antonio in September?
In September, San Antonio's typical UV index is about 10.5569 — 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, San Antonio sees the strongest UV in Summer, peaking around 12.6002 in July. Plan sun protection accordingly.
