Riverside UV index in September
Typical ultraviolet levels for Riverside during September, from the past year of data.
Very High
Riverside
Very high UV. Limit sun exposure, especially during midday; protective clothing, sunscreen, and a hat are essential.
8.7
UV Index
September average UTC
Low
Moderate
High
Very High
Extreme
September UV
8.6788
Risk level
Very High
Yearly peak
10.8975
Peak month
July
Riverside UV index — monthly trend
Average UV index by month over the past year, with September highlighted.
Visiting Riverside in September?
In September, Riverside's typical UV index is about 8.6788 — 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, Riverside sees the strongest UV in Summer, peaking around 10.8975 in July. Plan sun protection accordingly.
