Hesperia, California, USA UV Index in September
The average UV index in Hesperia, California, USA in September is about 8.2 (Very High), peaking near 10.9 at midday on clear days. Fair skin (Type II) can burn in roughly 11 minutes without sunscreen. SPF 50+ sunscreen, protective clothing, hat and sunglasses. Minimise midday sun exposure.
What is the UV index in Hesperia, California, USA in September?
Average UV
8.2
Very High
Midday Peak
10.9
Clear-sky estimate
Fair Skin Burn Time
11 min
Type II, no sunscreen
How long can you stay in the sun in Hesperia, California, USA in September?
| Skin type | Time to first burn | With SPF 30 |
|---|---|---|
| Type 1 | 7 min | up to 210 min |
| Type 2 | 11 min | up to 240 min |
| Type 3 | 18 min | up to 240 min |
| Type 4 | 29 min | up to 240 min |
| Type 5 | 44 min | up to 240 min |
| Type 6 | 66 min | up to 240 min |
Estimates based on Hesperia, California, USA's latitude and typical September sun angle. Cloud cover, altitude and reflection from water or sand can raise or lower the real UV. Check the live forecast before long days outside.
Hesperia, California, USA UV Index by Month
When is the UV index highest and lowest in Hesperia, California, USA?
Highest: June (about 9). Lowest: December (about 6.2).
| Month | Average UV | Midday peak | Level | Fair skin burn |
|---|---|---|---|---|
| January | 6.5 | 8.7 | High | 14 min |
| February | 7.1 | 9.5 | High | 13 min |
| March | 7.9 | 10.5 | High | 11 min |
| April | 8.6 | 11.5 | Very High | 10 min |
| May | 8.9 | 11.9 | Very High | 10 min |
| June | 9 | 12 | Very High | 10 min |
| July | 9 | 12 | Very High | 10 min |
| August | 8.8 | 11.7 | Very High | 10 min |
| September | 8.2 | 10.9 | Very High | 11 min |
| October | 7.5 | 10 | High | 12 min |
| November | 6.7 | 8.9 | High | 13 min |
| December | 6.2 | 8.3 | High | 15 min |
Common questions about UV in Hesperia, California, USA in September
Do you need sunscreen in Hesperia, California, USA in September?
Yes. A UV index of 8.2 is Very High, so use SPF 30+ on exposed skin between 10am and 4pm and reapply every two hours.
Can you tan in Hesperia, California, USA in September?
Yes, UV of 8.2 is strong enough to tan. Fair skin can burn in about 11 minutes, so build exposure slowly and use sunscreen.
What time of day is UV strongest in Hesperia, California, USA?
UV peaks around solar noon, roughly 11am to 2pm local time, when it can reach about 10.9 in September. Mornings and late afternoons are safest.
Is September a good month to visit Hesperia, California, USA for the sun?
September averages UV 8.2, compared with a yearly high of 9 in June and a low of 6.2 in December. Darker skin (Type VI) can burn in about 66 minutes at this level.