Vitamin D

The sun, month by month

Sunrise and sunset in Reykjavik in July

On July 1 in Reykjavik the sun rises at 03:05 and sets at 23:57; on day 31 it rises at 04:32 and sets at 22:35. Over the month the day gets 169 minutes shorter.

Sunrise03:41
Sunset23:26
Golden hour21:48–23:26
Day length19 h 45 min

Day by day

All times are local to Reykjavik. Dawn and dusk mark civil twilight.

DayDawnSunriseSunsetDuskDay length
103:0523:5720 h 52 min
203:0723:5620 h 49 min
303:0923:5420 h 45 min
403:1123:5220 h 41 min
503:1423:5020 h 37 min
603:1623:4820 h 32 min
703:1823:4620 h 28 min
803:2123:4420 h 23 min
903:2423:4220 h 18 min
1003:2623:3920 h 13 min
1103:2923:3720 h 07 min
1203:3223:3420 h 02 min
1303:3523:3119 h 56 min
1403:3823:2919 h 51 min
1503:4123:2619 h 45 min
1603:4423:2319 h 39 min
1703:4723:2019 h 33 min
1803:5023:1719 h 27 min
1903:5323:1419 h 21 min
2003:5623:1119 h 15 min
2103:6023:0819 h 09 min
2204:0323:0519 h 02 min
2304:0623:0218 h 56 min
2401:4704:0922:5901:2118 h 49 min
2502:0804:1222:5501:0018 h 43 min
2602:2004:1622:5200:4818 h 36 min
2702:3004:1922:4900:3818 h 30 min
2802:3904:2222:4600:2918 h 23 min
2902:4704:2622:4200:2118 h 17 min
3002:5404:2922:3900:1418 h 10 min
3103:0004:3222:3500:0718 h 03 min

Approximate astronomical values: they can shift a minute or two from year to year.

What about vitamin D in July?

In July, the typical synthesis window in Reykjavik runs from 11:00 to 17:00: with medium skin and a t-shirt, ~12 min at the best moment is enough.

See the Reykjavik vitamin D guide