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

Good Good. A full dose takes about 9 minutes at midday, and the usable window is about 6.7 hours a day.

6.7 hsun window (UV 2.5+)

5.9peak UV Index

9 minto a full dose

29°Cafternoon high

0/30rainy days

30/30sunny days

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

Open Madagascar for July on the map Find stays in Madagascar

How long in the sun in July?

Plan your sun session around midday (roughly 11:00 to 15:00), when the UV Index peaks at about 5.9. With about a quarter of your skin bare, a full dose takes around 9 minutes for skin type III at age 30, and about 17 minutes at age 65.
Stop well before your skin turns pink. At this UV level skin type III can start to burn after about 34 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	11 min	23 min
Type II	8 min	14 min	28 min
Type III	9 min	17 min	34 min
Type IV	14 min	25 min	51 min
Type V	18 min	34 min	68 min
Type VI	30 min	56 min	1.9 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 July

Place	Rating	Sun window	Full dose	Afternoon high	Rainy days
Antsiranana	Excellent	7.3 h	8 min	30°C	0/30
Nosy Be	Excellent	7.4 h	8 min	30°C	5/30
Antananarivo	Good	7.0 h	8 min	22°C	0/30
Morondava	Good	6.7 h	9 min	29°C	0/30
Ifaty	Good	6.4 h	10 min	27°C	2/30
Île Sainte-Marie	Bad weather	6.7 h	9 min	24°C	21/30

Other months in Madagascar

Best months: May to November. Full Madagascar guide

Other sunny places in July

All best places for vitamin D in July