Fire Island, New York: vitamin D, best months and travel guide
Largely car-free barrier island with quiet beaches and ferries. Best for: couples, quiet-stay seekers.
The best months for vitamin D in Fire Island are July, August, when a full dose takes about 8 minutes at midday. Too cool from September to June.
Fire Island month by month
| Month | Rating | Sun window | Peak UV | Full dose, age 30 | Afternoon high | Rainy days |
|---|---|---|---|---|---|---|
| January | Too cold | 0.8 h | 2.2 | – | 5°C | 11/30 |
| February | Too cold | 3.5 h | 3.4 | 16 min | 5°C | 7/30 |
| March | Too cold | 5.2 h | 4.4 | 12 min | 8°C | 8/30 |
| April | Too cold | 6.0 h | 5.4 | 10 min | 9°C | 7/30 |
| May | Too cold | 7.3 h | 6.2 | 9 min | 14°C | 9/30 |
| June | Too cold | 9.3 h | 7.5 | 7 min | 20°C | 5/30 |
| July | Excellent | 8.5 h | 7.1 | 8 min | 23°C | 3/30 |
| August | Good | 7.7 h | 6.6 | 8 min | 23°C | 5/30 |
| September | Too cold | 5.8 h | 5.1 | 10 min | 21°C | 4/30 |
| October | Too cold | 5.0 h | 4.3 | 12 min | 17°C | 0/30 |
| November | Too cold | 2.8 h | 2.9 | 18 min | 14°C | 6/30 |
| December | Too cold | 0.2 h | 2.1 | – | 7°C | 11/30 |
Sun window is the number of hours a day with UV Index 2.5 or higher. Full dose is the minutes at midday for about 1,000 IU of vitamin D with a quarter of the body bare, for skin type III. Rainy days are days with at least 1 mm out of 30.
What to expect in Fire Island
Largely car-free barrier island with quiet beaches and ferries. A short summer beach season from late June to early September, cool seas early on, and traffic on Friday and Sunday. The city is hot and humid in July.
In Fire Island afternoon highs average from 5°C in January to 23°C in August. The wettest month is January (about 11 rainy days out of 30) and the driest is October (0). Midday UV peaks at 7.5 in June.
More about New York · New York in July · Best places in July
Questions about Fire Island
When is the best time to visit Fire Island for vitamin D?
The best months for vitamin D in Fire Island are July, August, when a full dose takes about 8 minutes at midday.
What is the weather like in Fire Island?
Afternoon highs average from 5°C in January to 23°C in August. The wettest month is January, with about 11 rainy days out of 30.
Which months should I avoid in Fire Island?
For a beach stay, avoid the months when it is too cool from September to June.