Toronto
Vitamin D from the sun in Toronto
8 months of sun
In Toronto you can synthesize vitamin D from March to October.
From November to February synthesis isn't possible — this is when a supplement can help.
Toronto: we'll tell you the days you can make vitamin D.
Loading notifications…Today's sun in Toronto
Today's sunrise, sunset, golden hour and day length.
Year-round profile in Toronto
Daily hours with enough sun to synthesize vitamin D across the year.
Seasonal windows
- March: between 11:00 and 15:00, about 13 min for 1000 IU.
- June: between 09:00 and 17:00, about 7 min for 1000 IU.
- September: between 10:00 and 15:00, about 11 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 Toronto
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 Toronto
How sunrise, sunset and day length change over the year.
| Month | Sunrise | Sunset | Day length |
|---|---|---|---|
| 07:49 | 17:05 | 9 h 16 min | |
| 07:19 | 17:45 | 10 h 26 min | |
| 07:33 | 19:21 | 11 h 48 min | |
| 06:37 | 19:59 | 13 h 22 min | |
| 05:53 | 20:35 | 14 h 42 min | |
| 05:35 | 21:00 | 15 h 25 min | |
| 05:49 | 20:57 | 15 h 07 min | |
| 06:23 | 20:21 | 13 h 58 min | |
| 06:59 | 19:25 | 12 h 26 min | |
| 07:35 | 18:30 | 10 h 55 min | |
| 07:15 | 16:50 | 9 h 36 min | |
| 07:45 | 16:42 | 8 h 57 min |
Approximate values for mid-month (the 15th).
Frequently asked questions about vitamin D in Toronto
- Can I get vitamin D from the sun in winter in Toronto?
- In Toronto you can synthesize vitamin D from March to October.
- How many minutes of sun do I need in Toronto?
- In summer, about 13 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 Toronto?
- It shifts with the seasons: in June the sun rises around 05:35 and sets around 21:00; in December it rises around 07:45 and sets around 16:42.
- What is the longest day of the year in Toronto?
- Longest day: June, with about 15 h of daylight. Shortest day: December, with about 9 h.
- When is golden hour in Toronto?
- It's roughly the last hour before sunset: in June it starts around 20:16 and in December around 15:55.