Reykjavik
Vitamin D from the sun in Reykjavik
4 months of sun
In Reykjavik you can synthesize vitamin D from May to August.
From September to April synthesis isn't possible — this is when a supplement can help.
Reykjavik: we'll tell you the days you can make vitamin D.
Loading notifications…Today's sun in Reykjavik
Today's sunrise, sunset, golden hour and day length.
Year-round profile in Reykjavik
Daily hours with enough sun to synthesize vitamin D across the year.
Seasonal windows
- March: synthesis isn't possible.
- June: between 11:00 and 17:00, about 12 min for 1000 IU.
- September: synthesis isn't possible.
- December: synthesis isn't possible.
Estimated for Fitzpatrick type III skin, arms and face exposed, clear sky.
When to supplement in Reykjavik
During the months without solar synthesis, vitamin D comes only from food or a supplement. It is usually taken as D3, often with magnesium — which the body needs to activate it — and vitamin K (as K2), which contributes to the maintenance of normal bones.
More about supplementsSunrise and sunset by month in Reykjavik
How sunrise, sunset and day length change over the year.
| Month | Sunrise | Sunset | Day length |
|---|---|---|---|
| 10:58 | 16:17 | 5 h 19 min | |
| 09:30 | 17:55 | 8 h 24 min | |
| 07:53 | 19:22 | 11 h 29 min | |
| 06:00 | 20:56 | 14 h 57 min | |
| 04:14 | 22:34 | 18 h 20 min | |
| 02:57 | 23:59 | 21 h 02 min | |
| 03:41 | 23:26 | 19 h 45 min | |
| 05:21 | 21:43 | 16 h 22 min | |
| 06:56 | 19:48 | 12 h 52 min | |
| 08:26 | 17:59 | 9 h 33 min | |
| 10:05 | 16:21 | 6 h 17 min | |
| 11:18 | 15:29 | 4 h 11 min |
Approximate values for mid-month (the 15th).
Frequently asked questions about vitamin D in Reykjavik
- Can I get vitamin D from the sun in winter in Reykjavik?
- In Reykjavik you can synthesize vitamin D from May to August.
- How many minutes of sun do I need in Reykjavik?
- In summer, about 12 minutes with arms and face exposed is enough for 1000 IU (Fitzpatrick type III skin, clear sky).
- What time does the sun rise and set in Reykjavik?
- It shifts with the seasons: in June the sun rises around 02:57 and sets around 23:59; in December it rises around 11:18 and sets around 15:29.
- What is the longest day of the year in Reykjavik?
- Longest day: June, with about 21 h of daylight. Shortest day: December, with about 4 h.