London
Vitamin D from the sun in London
6 months of sun
In London you can synthesize vitamin D from April to September.
From October to March synthesis isn't possible — this is when a supplement can help.
London: we'll tell you the days you can make vitamin D.
Loading notifications…Today's sun in London
Today's sunrise, sunset, golden hour and day length.
Year-round profile in London
Daily hours with enough sun to synthesize vitamin D across the year.
Seasonal windows
- March: synthesis isn't possible.
- June: between 09:00 and 16:00, about 8 min for 1000 IU.
- September: between 11:00 and 14:00, about 16 min for 1000 IU.
- December: synthesis isn't possible.
Estimated for Fitzpatrick type III skin, arms and face exposed, clear sky.
When to supplement in London
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 London
How sunrise, sunset and day length change over the year.
| Month | Sunrise | Sunset | Day length |
|---|---|---|---|
| 08:01 | 16:19 | 8 h 19 min | |
| 07:18 | 17:12 | 9 h 53 min | |
| 06:19 | 18:01 | 11 h 42 min | |
| 06:07 | 19:54 | 13 h 47 min | |
| 05:09 | 20:44 | 15 h 35 min | |
| 04:43 | 21:19 | 16 h 36 min | |
| 05:01 | 21:12 | 16 h 11 min | |
| 05:47 | 20:22 | 14 h 35 min | |
| 06:38 | 19:12 | 12 h 33 min | |
| 07:29 | 18:02 | 10 h 33 min | |
| 07:23 | 16:08 | 8 h 45 min | |
| 08:01 | 15:52 | 7 h 51 min |
Approximate values for mid-month (the 15th).
Frequently asked questions about vitamin D in London
- Can I get vitamin D from the sun in winter in London?
- In London you can synthesize vitamin D from April to September.
- How many minutes of sun do I need in London?
- In summer, about 8 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 London?
- It shifts with the seasons: in June the sun rises around 04:43 and sets around 21:19; in December it rises around 08:01 and sets around 15:52.
- What is the longest day of the year in London?
- Longest day: June, with about 17 h of daylight. Shortest day: December, with about 8 h.
- When is golden hour in London?
- It's roughly the last hour before sunset: in June it starts around 20:25 and in December around 14:50.