Solar & Daylight Data

Updated 2026-08-31

Sun Path: Taguig, Philippines

How to research sun path for a specific site in Taguig — the controlling authority, source documents, and checks to run before you rely on a number.

Last updated August 31, 2026 · Location data from the [GeoNames PH dump](https://download.geonames.org/export/dump/PH.zip) (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 1684308). Regulatory starting point: [Department of Public Works and Highways and the local Office of the Building Official](https://www.dpwh.gov.ph/dpwh/references/laws_codes_orders/PD1096). Figures are illustrative — verify against the current locally adopted edition for the site. Solar-method context: [NOAA Solar Calculation Details](https://gml.noaa.gov/grad/solcalc/calcdetails.html); the Harth monthly table uses a simpler declination and geometric-daylight approximation whose stated limitations must be retained.

Direct answer

For Taguig at 14.5243, 121.0792, the declination-only solar-noon altitude is approximately 81.1° at the June solstice, 75.5° at an equinox and 52.0° 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 1684308 in administrative area NCR, at 14.5243, 121.0792; replace it with the surveyed parcel point before relying on the result. As a transparent geometry check, declination-only solar-noon altitude is about 81.1° at the June solstice, 75.5° at an equinox and 52.0° 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 Taguig?

Taguig is represented here at approximately 14.5243, 121.0792 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.
InputProject-specific evidenceQA question
Sitesurveyed coordinates, elevation and horizonDoes the point represent the building?
Weather/solar methodnamed dataset, algorithm, period and time basisAre station, time zone and units explicit?
Design scenariocurrent and future scenario agreed by the teamIs an average being mistaken for an extreme?
Complianceadopted local document and editionWas applicability confirmed with the authority?

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 Taguig site remain authoritative.

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.

Taguig monthly solar geometry check for sun path

Representative dateDeclinationSolar-noon altitudeGeometric daylightNoon shadow / height
21 January-20.14°55.34°11.273 h0.691
21 February-11.23°64.25°11.607 h0.482
21 March-0.40°75.07°11.986 h0.267
21 April+11.58°87.05°12.406 h0.051
21 May+20.14°84.39°12.727 h0.098
21 June+23.45°81.07°12.860 h0.157
21 July+20.44°84.08°12.739 h0.104
21 August+11.75°87.23°12.412 h0.048
21 September-0.20°75.27°11.993 h0.263
21 October-11.75°63.72°11.588 h0.494
21 November-20.44°55.03°11.261 h0.699
21 December-23.45°52.03°11.140 h0.781

Taguig solar-geometry fingerprint at 14.5243, 121.0792

  • Taguig, 21 January: declination -20.14°, noon altitude 55.34°, zenith 34.66°, geometric daylight 11.273 hours, and vertical-object noon shadow ratio 0.691.
  • Taguig, 21 February: declination -11.23°, noon altitude 64.25°, zenith 25.75°, geometric daylight 11.607 hours, and vertical-object noon shadow ratio 0.482.
  • Taguig, 21 March: declination -0.40°, noon altitude 75.07°, zenith 14.93°, geometric daylight 11.986 hours, and vertical-object noon shadow ratio 0.267.
  • Taguig, 21 April: declination +11.58°, noon altitude 87.05°, zenith 2.95°, geometric daylight 12.406 hours, and vertical-object noon shadow ratio 0.051.
  • Taguig, 21 May: declination +20.14°, noon altitude 84.39°, zenith 5.61°, geometric daylight 12.727 hours, and vertical-object noon shadow ratio 0.098.
  • Taguig, 21 June: declination +23.45°, noon altitude 81.07°, zenith 8.93°, geometric daylight 12.860 hours, and vertical-object noon shadow ratio 0.157.
  • Taguig, 21 July: declination +20.44°, noon altitude 84.08°, zenith 5.92°, geometric daylight 12.739 hours, and vertical-object noon shadow ratio 0.104.
  • Taguig, 21 August: declination +11.75°, noon altitude 87.23°, zenith 2.77°, geometric daylight 12.412 hours, and vertical-object noon shadow ratio 0.048.
  • Taguig, 21 September: declination -0.20°, noon altitude 75.27°, zenith 14.73°, geometric daylight 11.993 hours, and vertical-object noon shadow ratio 0.263.
  • Taguig, 21 October: declination -11.75°, noon altitude 63.72°, zenith 26.28°, geometric daylight 11.588 hours, and vertical-object noon shadow ratio 0.494.
  • Taguig, 21 November: declination -20.44°, noon altitude 55.03°, zenith 34.97°, geometric daylight 11.261 hours, and vertical-object noon shadow ratio 0.699.
  • Taguig, 21 December: declination -23.45°, noon altitude 52.03°, zenith 37.97°, geometric daylight 11.140 hours, and vertical-object noon shadow ratio 0.781.

Harth computed the Taguig fingerprint for latitude 14.5243° with the Cooper declination approximation, 90° - |latitude - declination| at solar noon, centre-to-centre sunrise hour angle and 1 / tan(altitude) shadow ratio. Longitude 121.0792° 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.

Sources and method

Location data from the GeoNames PH dump (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 1684308). 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.

Frequently asked questions

What does the sun path record for Taguig establish?

The sun path record for Taguig establishes a reproducible discovery point at 14.5243, 121.0792 (GeoNames ID 1684308, administrative area NCR) and a Philippines source path. It does not establish a final project value, approval or parcel decision.

What must be replaced before using this sun path workflow for a project in Taguig?

For the sun path record in Taguig, replace the 14.5243, 121.0792 city reference with the surveyed site or parcel, identify the competent local authority, and verify the current documents under National Building Code of the Philippines and its referral codes. Record the edition, retrieval date, units, assumptions and named checker before relying on the result.

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