Monterey, California: vitamin D, best months and travel guide
World-class aquarium and cool coastal weather. Best for: families, nature lovers.
The best months for vitamin D in Monterey are October, when a full dose takes about 10 minutes at midday. Too cool from November to September.
Monterey month by month
| Month | Rating | Sun window | Peak UV | Full dose, age 30 | Afternoon high | Rainy days |
|---|---|---|---|---|---|---|
| January | Too cold | 2.5 h | 3.0 | 18 min | 15°C | 10/30 |
| February | Too cold | 4.5 h | 4.1 | 13 min | 16°C | 8/30 |
| March | Too cold | 6.5 h | 5.6 | 10 min | 16°C | 7/30 |
| April | Too cold | 8.1 h | 6.9 | 8 min | 16°C | 3/30 |
| May | Too cold | 8.9 h | 7.6 | 7 min | 17°C | 1/30 |
| June | Too cold | 9.5 h | 8.1 | 7 min | 18°C | 0/30 |
| July | Too cold | 9.5 h | 8.1 | 7 min | 21°C | 0/30 |
| August | Too cold | 8.8 h | 7.6 | 7 min | 20°C | 0/30 |
| September | Too cold | 7.7 h | 6.5 | 8 min | 20°C | 0/30 |
| October | Good | 6.3 h | 5.2 | 10 min | 23°C | 0/30 |
| November | Too cold | 4.0 h | 3.7 | 14 min | 18°C | 6/30 |
| December | Too cold | 2.6 h | 2.9 | 18 min | 17°C | 8/30 |
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 Monterey
World-class aquarium and cool coastal weather. The Pacific is cool all year. The south coast is sunny and pleasant, but May to June often brings morning fog (June Gloom). Summer is dry and warm, and winter can bring rain.
In Monterey afternoon highs average from 15°C in January to 23°C in October. The wettest month is January (about 10 rainy days out of 30) and the driest is October (0). Midday UV peaks at 8.1 in June, which is very strong, so protect your skin.
More about California · California in October · Best places in October
Questions about Monterey
When is the best time to visit Monterey for vitamin D?
The best months for vitamin D in Monterey are October, when a full dose takes about 10 minutes at midday.
What is the weather like in Monterey?
Afternoon highs average from 15°C in January to 23°C in October. The wettest month is January, with about 10 rainy days out of 30.
Which months should I avoid in Monterey?
For a beach stay, avoid the months when it is too cool from November to September.