Solar Noon Calculator

Solar noon is the moment each day when the sun reaches its highest point in the sky and crosses the local meridian. Unlike clock noon (12:00 PM), solar noon varies throughout the year and differs from one location to another based on longitude and the equation of time. At solar noon, shadows are at their shortest and the sun's energy is most intense.

Clock time is standardized across time zones, while solar noon depends on your exact longitude and the equation of time — a correction that accounts for Earth's elliptical orbit and axial tilt. The difference can range from about -16 minutes to +14 minutes throughout the year. Additionally, if you are not at the center meridian of your time zone, your solar noon will shift accordingly.

The equation of time is the difference in minutes between apparent solar time (based on the sun's actual position) and mean solar time (a uniform clock). It arises because Earth's orbit around the sun is elliptical, not circular, and because Earth's axis is tilted. This correction shifts solar noon earlier or later relative to clock time by up to about 16 minutes depending on the time of year.

Solar declination is the angle between the sun's rays and Earth's equatorial plane, measured in degrees. It ranges from about -23.45° at the December solstice to +23.45° at the June solstice. Declination affects how high the sun gets in the sky and determines the length of daylight at a given latitude.

You can find your latitude and longitude using Google Maps (right-click your location and select 'What's here?'), your smartphone's GPS settings, or any online geolocation tool. Latitude ranges from -90° (South Pole) to +90° (North Pole), and longitude from -180° (west) to +180° (east).

Solar panels generate maximum electricity when the sun is at its highest and most direct angle. Knowing the exact solar noon time helps optimize the orientation and tilt of solar panels, schedule operations that benefit from peak sunlight, and understand your system's daily production window. For fixed-panel systems, solar noon is the reference point for optimal panel azimuth.

Yes, solar noon shifts throughout the year due to two factors: the equation of time (which changes with Earth's orbital speed and axial tilt) and, in some regions, daylight saving time adjustments to clocks. The variation follows an annual pattern known as the analemma, with solar noon reaching its earliest and latest points around early November and early February.

The longitude correction accounts for the difference between your exact longitude and the standard meridian of your time zone (which is a multiple of 15°). Each degree of longitude corresponds to 4 minutes of time. If you are east of your time zone's central meridian, solar noon comes earlier on your clock; if you are west, it comes later.