Vitamin D in Taiwan: best months for sun and a travel guide

The best months for vitamin D in Taiwan are March to May, October, November. In April, a full dose of about 1,000 IU takes around 7 minutes at midday for skin type III at age 30, with 7.6 usable sun hours a day. For a beach stay it is too cool from December to February and rainy or stormy from June to September.

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Taiwan month by month

Taiwan is rated at its median coastal place, for skin type III at age 30. Click a month for the details.

Month	Rating	Sun window	Peak UV	Full dose, age 30	Full dose, age 65	Afternoon high	Rainy days
January	Too cold	4.8 h	4.7	11 min	21 min	19°C	4/30
February	Too cold	6.0 h	5.5	10 min	18 min	20°C	5/30
March	Good	5.4 h	5.8	9 min	17 min	23°C	12/30
April	Excellent	7.6 h	7.8	7 min	13 min	29°C	10/30
May	Excellent	6.6 h	7.2	7 min	14 min	26°C	15/30
June	Bad weather	8.0 h	8.0	7 min	13 min	30°C	23/30
July	Bad weather	8.1 h	8.1	7 min	12 min	32°C	22/30
August	Bad weather	8.1 h	8.3	6 min	12 min	30°C	21/30
September	Bad weather	7.4 h	7.5	7 min	13 min	32°C	19/30
October	Good	4.3 h	4.3	12 min	23 min	28°C	15/30
November	Good	4.9 h	4.9	11 min	20 min	24°C	5/30
December	Too cold	3.9 h	4.1	13 min	24 min	20°C	5/30

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.

Travel guide: why go to Taiwan

Why go

Taiwan is a friendly, easy island with night markets, mountains and warm southern beaches.

Best for

Foodies, city travellers and hikers.

What to expect

A hot, humid summer with typhoons from July to October, and mild winters. Kenting and Penghu have the best beaches. Public transport is excellent.

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Places in Taiwan

Each place has its own climate, so its best months can differ from the country as a whole.

Kenting best: Excellent

Southern beach and national park, with surf and sun.

Best for families, couples, surfers

Best months November to May · Avoid rainy or stormy from June to October

Taipei best: Good

Night markets, hot springs and a skyscraper with a famous view.

Best for foodies, city lovers

Best months March, October · Avoid too hot from July to August; too cool from December to February; rainy or stormy from April to June and in September

) – the national capital of Taiwan and one of the world's major global cities, as well as the center of commerce and culture.

Penghu best: Excellent

Windy island group of basalt columns and clear water.

Best for windsurfers, couples

Best months April to July, October, November · Avoid too cool from December to March; rainy or stormy from August to September

Hualien City best: Excellent

Gateway to Taroko Gorge.

Best for hikers, nature lovers

Best months April, November · Avoid too hot from July to August; too cool from December to March; rainy or stormy from May to June and from September to October

Kaohsiung best: Excellent

Port city of art spaces and a lively harbour.

Best for city lovers, foodies

Best months October to May · Avoid rainy or stormy from June to September

) – The third-largest city on the island. It has one of the busiest sea ports (the Port of Kaohsiung) in the world and the…

Some short descriptions come from Wikivoyage (CC BY-SA 4.0).

Questions about vitamin D in Taiwan

When is the best time to visit Taiwan for vitamin D?

Can you get vitamin D from the sun in Taiwan in December?

Yes, but slowly. In December a full dose takes about 13 minutes at midday for skin type III at age 30, with 3.9 usable hours a day.

How long do I need in the sun in Taiwan?

In April, the best month, about 7 minutes at midday with a quarter of the body bare, for skin type III at age 30; about 13 minutes at age 65. Darker skin needs longer and fair skin burns sooner, so keep sessions short. This is an estimate for planning, not medical advice.

Which months should I avoid in Taiwan?

For a beach stay, avoid the months when it is too cool from December to February and rainy or stormy from June to September.

What is the best place in Taiwan for vitamin D?

In April the strongest sun of the places we rate is around Kaohsiung. Each place has its own rating, so open the place list to compare them.