Vitamin D in Florida in December: sun, UV and what to expect
Good Good. A full dose takes about 12 minutes at midday, and the usable window is about 5.0 hours a day.
5.0 hsun window (UV 2.5+)
4.5peak UV Index
12 minto a full dose
25°Cafternoon high
5/30rainy days
26/30sunny days
Best places in Florida in December: Sanibel Island (good), Naples (good), Key West (good), Miami Beach (good), St. Petersburg (good).
How long in the sun in December?
- Plan your sun session around midday (roughly 11:00 to 15:00), when the UV Index peaks at about 4.5. With about a quarter of your skin bare, a full dose takes around 12 minutes for skin type III at age 30, and about 22 minutes at age 65.
- Stop well before your skin turns pink. At this UV level skin type III can start to burn after about 44 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 | 8 min | 15 min | 30 min |
| Type II | 10 min | 19 min | 37 min |
| Type III | 12 min | 22 min | 44 min |
| Type IV | 18 min | 33 min | 67 min |
| Type V | 24 min | 44 min | 89 min |
| Type VI | 40 min | 74 min | 2.5 h |
Minutes at midday for about 1,000 IU of vitamin D with a quarter of the body bare, at Fort Lauderdale, 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 Florida in December
| Place | Rating | Sun window | Full dose | Afternoon high | Rainy days |
|---|---|---|---|---|---|
| Sanibel Island | Good | 5.6 h | 11 min | 23°C | 4/30 |
| Naples | Good | 5.5 h | 11 min | 24°C | 2/30 |
| Key West | Good | 5.2 h | 11 min | 25°C | 5/30 |
| Miami Beach | Good | 5.0 h | 12 min | 25°C | 6/30 |
| St. Petersburg | Good | 5.0 h | 12 min | 23°C | 1/30 |
| Fort Lauderdale | Good | 5.0 h | 12 min | 25°C | 5/30 |
| Palm Beach | Good | 4.9 h | 12 min | 24°C | 4/30 |
| Orlando | Too cold | 4.8 h | 12 min | 22°C | 6/30 |
| Clearwater Beach | Too cold | 4.7 h | 12 min | 22°C | 4/30 |
| Daytona Beach | Too cold | 4.8 h | 13 min | 21°C | 4/30 |
| Destin | Too cold | 4.5 h | 13 min | 19°C | 5/30 |
| Pensacola | Too cold | 4.2 h | 14 min | 19°C | 7/30 |
Other months in Florida
- Jan Too cold
- Feb Good
- Mar Excellent
- Apr Excellent
- May Excellent
- Jun Excellent
- Jul Too hot
- Aug Excellent
- Sep Bad weather
- Oct Bad weather
- Nov Good
- Dec Good
Best months: February to June, August, November, December. Full Florida guide