Vitamin D in Madagascar in June: sun, UV and what to expect

Good Good. A full dose takes about 10 minutes at midday, and the usable window is about 6.5 hours a day.

6.5 hsun window (UV 2.5+)

5.6peak UV Index

10 minto a full dose

31°Cafternoon high

0/30rainy days

30/30sunny days

Best places in Madagascar in June: Antsiranana (good), Nosy Be (good), Morondava (good), Ifaty (good).

Open Madagascar for June on the map Find stays in Madagascar

How long in the sun in June?

Plan your sun session around midday (roughly 11:00 to 15:00), when the UV Index peaks at about 5.6. With about a quarter of your skin bare, a full dose takes around 10 minutes for skin type III at age 30, and about 18 minutes at age 65.
Stop well before your skin turns pink. At this UV level skin type III can start to burn after about 36 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	6 min	12 min	24 min
Type II	8 min	15 min	30 min
Type III	10 min	18 min	36 min
Type IV	14 min	27 min	54 min
Type V	19 min	36 min	71 min
Type VI	32 min	60 min	2.0 h

Minutes at midday for about 1,000 IU of vitamin D with a quarter of the body bare, at Morondava, 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 Madagascar in June

Place	Rating	Sun window	Full dose	Afternoon high	Rainy days
Antsiranana	Good	7.1 h	8 min	31°C	1/30
Nosy Be	Good	7.2 h	8 min	30°C	9/30
Morondava	Good	6.5 h	10 min	31°C	0/30
Ifaty	Good	6.1 h	10 min	29°C	1/30
Antananarivo	Too cold	6.2 h	9 min	21°C	2/30
Île Sainte-Marie	Bad weather	5.8 h	10 min	25°C	25/30

Other months in Madagascar

Best months: May to November. Full Madagascar guide

Other sunny places in June

All best places for vitamin D in June