Vitamin D in France in October: sun, UV and what to expect
Fair Fair. A full dose takes up to about 16 minutes and the usable window is about 3.4 hours a day, so choose the middle of the day.
3.4 hsun window (UV 2.5+)
3.4peak UV Index
16 minto a full dose
22°Cafternoon high
11/30rainy days
24/30sunny days
Best places in France in October: Marseille (good), Ajaccio (good), Cassis (good), Nice (good), Cannes (good).
How long in the sun in October?
- Plan your sun session around midday (roughly 11:00 to 15:00), when the UV Index peaks at about 3.4. With about a quarter of your skin bare, a full dose takes around 16 minutes for skin type III at age 30, and about 29 minutes at age 65.
- Stop well before your skin turns pink. At this UV level skin type III can start to burn after about 59 minutes of midday sun, so cover up, find shade and use SPF 30+ on skin that stays out.
- Water, sand and light surfaces reflect UV, so at the beach you get a little more sun than the number suggests, for the good and the bad.
| Skin type | Full dose, age 30 | Full dose, age 65 | Time to burn |
|---|---|---|---|
| Type I | 10 min | 20 min | 39 min |
| Type II | 13 min | 25 min | 49 min |
| Type III | 16 min | 29 min | 59 min |
| Type IV | 24 min | 44 min | 88 min |
| Type V | 31 min | 59 min | 2.0 h |
| Type VI | 52 min | 98 min | 3.3 h |
Minutes at midday for about 1,000 IU of vitamin D with a quarter of the body bare, at Biarritz, the median coastal place. Time to burn is the time to reach one minimal erythemal dose and does not depend on age. A rough planning guide, not medical advice.
Places in France in October
| Place | Rating | Sun window | Full dose | Afternoon high | Rainy days |
|---|---|---|---|---|---|
| Marseille | Good | 4.4 h | 14 min | 22°C | 9/30 |
| Ajaccio | Good | 4.3 h | 13 min | 23°C | 12/30 |
| Cassis | Good | 4.3 h | 14 min | 23°C | 8/30 |
| Nice | Good | 3.9 h | 15 min | 22°C | 6/30 |
| Cannes | Good | 3.6 h | 15 min | 22°C | 11/30 |
| Antibes | Good | 3.6 h | 15 min | 22°C | 12/30 |
| Biarritz | Fair | 3.4 h | 16 min | 22°C | 11/30 |
| Bonifacio | Too cold | 4.4 h | 13 min | 21°C | 11/30 |
| Porto-Vecchio | Too cold | 4.0 h | 14 min | 21°C | 11/30 |
| Saint-Tropez | Too cold | 3.5 h | 16 min | 22°C | 10/30 |
| La Rochelle | Too cold | 3.0 h | 18 min | 19°C | 9/30 |
| Saint-Malo | Too cold | 2.5 h | 19 min | 17°C | 11/30 |
Other months in France
- Jan Too cold
- Feb Too cold
- Mar Too cold
- Apr Too cold
- May Too cold
- Jun Excellent
- Jul Excellent
- Aug Good
- Sep Good
- Oct Fair
- Nov Too cold
- Dec Too cold
Best months: June to September. Full France guide