McAllen UV index in September
Typical ultraviolet levels for McAllen during September, from the past year of data.
Extreme
McAllen
Extreme UV. Avoid sun exposure, seek shade, and use comprehensive protection: clothing, sunscreen, and a hat.
11.3
UV Index
September average UTC
Low
Moderate
High
Very High
Extreme
September UV
11.3415
Risk level
Extreme
Yearly peak
13.0339
Peak month
July
McAllen UV index — monthly trend
Average UV index by month over the past year, with September highlighted.
Visiting McAllen in September?
In September, McAllen's typical UV index is about 11.3415 — a extreme risk level. Extreme UV. Avoid sun exposure, seek shade, and use comprehensive protection: clothing, sunscreen, and a hat.
Across the year, McAllen sees the strongest UV in Summer, peaking around 13.0339 in July. Plan sun protection accordingly.
