Grass Valley, California, USA UV Index in November
The average UV index in Grass Valley, California, USA in November is about 4.9 (Moderate), peaking near 7.7 at midday on clear days. Fair skin (Type II) can burn in roughly 18 minutes without sunscreen. Wear SPF 30+ sunscreen if you are outside for more than an hour, especially near water or sand.
What is the UV index in Grass Valley, California, USA in November?
Average UV
4.9
Moderate
Midday Peak
7.7
Clear-sky estimate
Fair Skin Burn Time
18 min
Type II, no sunscreen
How long can you stay in the sun in Grass Valley, California, USA in November?
| Skin type | Time to first burn | With SPF 30 |
|---|---|---|
| Type 1 | 12 min | up to 240 min |
| Type 2 | 18 min | up to 240 min |
| Type 3 | 31 min | up to 240 min |
| Type 4 | 49 min | up to 240 min |
| Type 5 | 73 min | up to 240 min |
| Type 6 | 110 min | up to 240 min |
Estimates based on Grass Valley, California, USA's latitude and typical November 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.
Grass Valley, California, USA UV Index by Month
When is the UV index highest and lowest in Grass Valley, California, USA?
Highest: June (about 7). Lowest: December (about 4.5).
| Month | Average UV | Midday peak | Level | Fair skin burn |
|---|---|---|---|---|
| January | 4.7 | 7.4 | Moderate | 19 min |
| February | 5.3 | 8.3 | Moderate | 17 min |
| March | 6 | 9.4 | High | 15 min |
| April | 6.6 | 10.4 | High | 14 min |
| May | 6.9 | 10.8 | High | 13 min |
| June | 7 | 11 | High | 13 min |
| July | 7 | 11 | High | 13 min |
| August | 6.7 | 10.5 | High | 13 min |
| September | 6.3 | 9.9 | High | 14 min |
| October | 5.6 | 8.8 | Moderate | 16 min |
| November | 4.9 | 7.7 | Moderate | 18 min |
| December | 4.5 | 7.1 | Moderate | 20 min |
Common questions about UV in Grass Valley, California, USA in November
Do you need sunscreen in Grass Valley, California, USA in November?
Yes. A UV index of 4.9 is Moderate, so use SPF 30+ on exposed skin between 10am and 4pm and reapply every two hours.
Can you tan in Grass Valley, California, USA in November?
Yes, UV of 4.9 is strong enough to tan. Fair skin can burn in about 18 minutes, so build exposure slowly and use sunscreen.
What time of day is UV strongest in Grass Valley, California, USA?
UV peaks around solar noon, roughly 11am to 2pm local time, when it can reach about 7.7 in November. Mornings and late afternoons are safest.
Is November a good month to visit Grass Valley, California, USA for the sun?
November averages UV 4.9, compared with a yearly high of 7 in June and a low of 4.5 in December. Darker skin (Type VI) can burn in about 110 minutes at this level.