Annual Daylight Chart
View a full year of daylight hours charted week by week for any latitude.
How It Works
Enter your latitude to generate a week-by-week daylight chart for the full year. See the gradual shift from winter minimum to summer maximum and back.
Formula
Weekly daylight hours throughout the year for any latitude
Frequently Asked Questions
What does an annual daylight chart show?
It shows how daylight hours change through the year at a given latitude, from the winter solstice minimum through the summer solstice maximum.
Why is there a symmetric pattern?
Daylight hours follow a roughly sinusoidal pattern due to Earth's orbital mechanics. The curve is symmetric around the solstices.