Vitamin DGlobal Solar Explorer

Vitamin D from the sun in Honolulu

In Honolulu you can synthesize vitamin D all year round.

Year-round profile in Honolulu

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Daily hours with enough sun to synthesize vitamin D across the year.

Seasonal windows

  • March: between 09:00 and 17:00, about 5 min for 1000 IU.
  • June: between 09:00 and 17:00, about 4 min for 1000 IU.
  • September: between 09:00 and 17:00, about 4 min for 1000 IU.
  • December: between 10:00 and 16:00, about 9 min for 1000 IU.

Estimated for Fitzpatrick type III skin, arms and face exposed, clear sky.

Calculate my window in Honolulu

Frequently asked questions about vitamin D in Honolulu

Can I get vitamin D from the sun in winter in Honolulu?
In Honolulu you can synthesize vitamin D all year round.
How many minutes of sun do I need in Honolulu?
In summer, about 5 minutes with arms and face exposed is enough for 1000 IU (Fitzpatrick type III skin, clear sky).
Built by Javier Aguilar