Denver
Vitamin D from the sun in Denver
9 months of sun
In Denver you can synthesize vitamin D from February to October.
From November to January synthesis isn't possible — this is when a supplement can help.
Denver: we'll tell you the days you can make vitamin D.
Loading notifications…Today's sun in Denver
Today's sunrise, sunset, golden hour and day length.
Year-round profile in Denver
Daily hours with enough sun to synthesize vitamin D across the year.
Seasonal windows
- March: between 10:00 and 15:00, about 9 min for 1000 IU.
- June: between 08:00 and 17:00, about 5 min for 1000 IU.
- September: between 09:00 and 15:00, about 8 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 Denver
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 Denver
How sunrise, sunset and day length change over the year.
| Month | Sunrise | Sunset | Day length |
|---|---|---|---|
| 07:20 | 16:59 | 9 h 39 min | |
| 06:55 | 17:34 | 10 h 39 min | |
| 07:15 | 19:05 | 11 h 50 min | |
| 06:24 | 19:36 | 13 h 12 min | |
| 05:46 | 20:07 | 14 h 21 min | |
| 05:31 | 20:29 | 14 h 58 min | |
| 05:44 | 20:27 | 14 h 43 min | |
| 06:13 | 19:56 | 13 h 43 min | |
| 06:43 | 19:06 | 12 h 23 min | |
| 07:13 | 18:17 | 11 h 04 min | |
| 06:47 | 16:43 | 9 h 55 min | |
| 07:15 | 16:37 | 9 h 22 min |
Approximate values for mid-month (the 15th).
Frequently asked questions about vitamin D in Denver
- Can I get vitamin D from the sun in winter in Denver?
- In Denver you can synthesize vitamin D from February to October.
- How many minutes of sun do I need in Denver?
- In summer, about 9 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 Denver?
- It shifts with the seasons: in June the sun rises around 05:31 and sets around 20:29; in December it rises around 07:15 and sets around 16:37.
- What is the longest day of the year in Denver?
- Longest day: June, with about 15 h of daylight. Shortest day: December, with about 9 h.
- When is golden hour in Denver?
- It's roughly the last hour before sunset: in June it starts around 19:49 and in December around 15:54.