Boston UV index in September
Typical ultraviolet levels for Boston during September, from the past year of data.
Moderate
Boston
Moderate UV. Protect your skin during midday hours; wearing a hat and applying sunscreen is advisable.
5.6
UV Index
September average UTC
Low
Moderate
High
Very High
Extreme
September UV
5.593
Risk level
Moderate
Yearly peak
7.9149
Peak month
July
Boston UV index — monthly trend
Average UV index by month over the past year, with September highlighted.
Visiting Boston in September?
In September, Boston's typical UV index is about 5.593 — a moderate risk level. Moderate UV. Protect your skin during midday hours; wearing a hat and applying sunscreen is advisable.
Across the year, Boston sees the strongest UV in Summer, peaking around 7.9149 in July. Plan sun protection accordingly.
