Sun Path: Santol, Philippines

Direct answer

For Santol at 15.1622, 120.5675, the declination-only solar-noon altitude is approximately 81.7° at the June solstice, 74.8° at an equinox and 51.4° at the December solstice. Refine these geometry checks with the project date, civil time, facade azimuth, terrain and local horizon. The reproducible location record is GeoNames ID 1687687 in administrative area 03, at 15.1622, 120.5675; replace it with the surveyed parcel point before relying on the result. As a transparent geometry check, declination-only solar-noon altitude is about 81.7° at the June solstice, 74.8° at an equinox and 51.4° at the December solstice. Representative 21st-day geometry ranges from about 11.1 hours in December to 12.9 hours in June; this excludes atmospheric refraction, terrain and obstruction effects. The cited national authority is a discovery starting point; current local documents and a named qualified reviewer control project use of this sun path record.

Prepared by Harth · Prepared from the cited location and country sources; local project inputs remain unreviewed · Published 2026-08-26 · Updated 2026-08-31.

What must be verified for Santol?

Santol is represented here at approximately 15.1622, 120.5675 for discovery and workflow planning. A project address, parcel, elevation, exposure, authority, and submission date must replace that city-centre reference before design use.

How should sun path be established?

1. Fix the surveyed site and local time basis.
2. Select an authoritative weather source or a named solar-position algorithm.
3. Record period, percentile or scenario and units.
4. Test sensitivity to elevation, exposure, urban form and horizon.
5. Save the source file, retrieval date and checker in the model record.

What are the limits of this worksheet?

This sun-path-workflow page is a project-starting worksheet, not a design value or approval. The controlling authority and qualified professionals for the Santol site remain authoritative.

Which related searches does this primary location record cover?

This primary route consolidates the location evidence needed for Sun Path, Solar Altitude & Azimuth, Solar Shading Design, Daylight & Orientation. A narrower route should be released only when it adds a materially different official source, calculation, process, threshold or worked example.

Santol monthly solar geometry check for sun path

Santol solar-geometry fingerprint at 15.1622, 120.5675

• Santol, 21 January: declination -20.14°, noon altitude 54.70°, zenith 35.30°, geometric daylight 11.240 hours, and vertical-object noon shadow ratio 0.708.
• Santol, 21 February: declination -11.23°, noon altitude 63.61°, zenith 26.39°, geometric daylight 11.589 hours, and vertical-object noon shadow ratio 0.496.
• Santol, 21 March: declination -0.40°, noon altitude 74.43°, zenith 15.57°, geometric daylight 11.985 hours, and vertical-object noon shadow ratio 0.279.
• Santol, 21 April: declination +11.58°, noon altitude 86.42°, zenith 3.58°, geometric daylight 12.424 hours, and vertical-object noon shadow ratio 0.063.
• Santol, 21 May: declination +20.14°, noon altitude 85.02°, zenith 4.98°, geometric daylight 12.760 hours, and vertical-object noon shadow ratio 0.087.
• Santol, 21 June: declination +23.45°, noon altitude 81.71°, zenith 8.29°, geometric daylight 12.900 hours, and vertical-object noon shadow ratio 0.146.
• Santol, 21 July: declination +20.44°, noon altitude 84.72°, zenith 5.28°, geometric daylight 12.773 hours, and vertical-object noon shadow ratio 0.092.
• Santol, 21 August: declination +11.75°, noon altitude 86.59°, zenith 3.41°, geometric daylight 12.431 hours, and vertical-object noon shadow ratio 0.060.
• Santol, 21 September: declination -0.20°, noon altitude 74.64°, zenith 15.36°, geometric daylight 11.993 hours, and vertical-object noon shadow ratio 0.275.
• Santol, 21 October: declination -11.75°, noon altitude 63.08°, zenith 26.92°, geometric daylight 11.569 hours, and vertical-object noon shadow ratio 0.508.
• Santol, 21 November: declination -20.44°, noon altitude 54.40°, zenith 35.60°, geometric daylight 11.227 hours, and vertical-object noon shadow ratio 0.716.
• Santol, 21 December: declination -23.45°, noon altitude 51.39°, zenith 38.61°, geometric daylight 11.100 hours, and vertical-object noon shadow ratio 0.799.

Harth computed the Santol fingerprint for latitude 15.1622° with the Cooper declination approximation, 90° - |latitude - declination| at solar noon, centre-to-centre sunrise hour angle and 1 / tan(altitude) shadow ratio. Longitude 120.5675° is retained for a later civil-time conversion; this screen does not perform that conversion. See NOAA's solar calculation details. Atmospheric refraction, terrain, facade azimuth and obstructions remain outside this first-pass comparison.

Where can you explore related guidance?

• Explore all solar data guidance
• Sun Path: Angeles City, Philippines
• Sun Path: Tarlac City, Philippines
• Sun Path: Cabanatuan City, Philippines
• Sun Path: San Jose del Monte, Philippines
• All solar & daylight data guidance for Philippines
• Climate Design Data: Santol, Philippines

Sources and method

Location data from the GeoNames PH dump (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 1687687). Regulatory starting point: Department of Public Works and Highways and the local Office of the Building Official. Figures are illustrative — verify against the current locally adopted edition for the site. Solar-method context: NOAA Solar Calculation Details; the Harth monthly table uses a simpler declination and geometric-daylight approximation whose stated limitations must be retained.

Source links

• download.geonames.org

• dpwh.gov.ph

• gml.noaa.gov