Solar & Daylight Data

Updated 2026-08-31

Sun Path: Kuching, Malaysia

How to research sun path for a specific site in Kuching — 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 MY dump](https://download.geonames.org/export/dump/MY.zip) (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 1735634). Regulatory starting point: [the applicable state and local authority](https://jkt.kpkt.gov.my/). 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 Kuching at 1.5500, 110.3333, the declination-only solar-noon altitude is approximately 68.1° at the June solstice, 88.5° at an equinox and 65.0° 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 1735634 in administrative area 11, at 1.5500, 110.3333; replace it with the surveyed parcel point before relying on the result. As a transparent geometry check, declination-only solar-noon altitude is about 68.1° at the June solstice, 88.5° at an equinox and 65.0° at the December solstice. Representative 21st-day geometry ranges from about 11.9 hours in December to 12.1 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 Kuching?

Kuching is represented here at approximately 1.5500, 110.3333 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 Kuching 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.

Kuching monthly solar geometry check for sun path

Representative dateDeclinationSolar-noon altitudeGeometric daylight
21 January-20.14°68.3°11.9 h
21 February-11.23°77.2°12.0 h
21 March-0.40°88.0°12.0 h
21 April+11.58°80.0°12.0 h
21 May+20.14°71.4°12.1 h
21 June+23.45°68.1°12.1 h
21 July+20.44°71.1°12.1 h
21 August+11.75°79.8°12.0 h
21 September-0.20°88.2°12.0 h
21 October-11.75°76.7°12.0 h
21 November-20.44°68.0°11.9 h
21 December-23.45°65.0°11.9 h

Month-by-month geometry interpretation

  • 21 January: approximate solar-noon altitude 68.3° (zenith angle 21.7°) and 11.9 hours of geometric daylight. That is 0.0 hours longer than the preceding representative date in this annual sequence.
  • 21 February: approximate solar-noon altitude 77.2° (zenith angle 12.8°) and 12.0 hours of geometric daylight. That is 0.0 hours longer than the preceding representative date in this annual sequence.
  • 21 March: approximate solar-noon altitude 88.0° (zenith angle 2.0°) and 12.0 hours of geometric daylight. That is 0.0 hours longer than the preceding representative date in this annual sequence.
  • 21 April: approximate solar-noon altitude 80.0° (zenith angle 10.0°) and 12.0 hours of geometric daylight. That is 0.0 hours longer than the preceding representative date in this annual sequence.
  • 21 May: approximate solar-noon altitude 71.4° (zenith angle 18.6°) and 12.1 hours of geometric daylight. That is 0.0 hours longer than the preceding representative date in this annual sequence.
  • 21 June: approximate solar-noon altitude 68.1° (zenith angle 21.9°) and 12.1 hours of geometric daylight. That is 0.0 hours longer than the preceding representative date in this annual sequence.
  • 21 July: approximate solar-noon altitude 71.1° (zenith angle 18.9°) and 12.1 hours of geometric daylight. That is 0.0 hours shorter than the preceding representative date in this annual sequence.
  • 21 August: approximate solar-noon altitude 79.8° (zenith angle 10.2°) and 12.0 hours of geometric daylight. That is 0.0 hours shorter than the preceding representative date in this annual sequence.
  • 21 September: approximate solar-noon altitude 88.2° (zenith angle 1.8°) and 12.0 hours of geometric daylight. That is 0.0 hours shorter than the preceding representative date in this annual sequence.
  • 21 October: approximate solar-noon altitude 76.7° (zenith angle 13.3°) and 12.0 hours of geometric daylight. That is 0.0 hours shorter than the preceding representative date in this annual sequence.
  • 21 November: approximate solar-noon altitude 68.0° (zenith angle 22.0°) and 11.9 hours of geometric daylight. That is 0.0 hours shorter than the preceding representative date in this annual sequence.
  • 21 December: approximate solar-noon altitude 65.0° (zenith angle 25.0°) and 11.9 hours of geometric daylight. That is 0.0 hours shorter than the preceding representative date in this annual sequence.

Harth calculation for latitude 1.5500°: Cooper declination approximation, 90° - |latitude - declination| at solar noon, and centre-to-centre sunrise hour angle. See NOAA's solar calculation details for fuller method context. This screening table excludes equation-of-time/civil-time conversion, atmospheric refraction, terrain, facade azimuth and obstructions; it is not an hourly shading result.

Sources and method

Location data from the GeoNames MY dump (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 1735634). Regulatory starting point: the applicable state and local authority. 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 Kuching establish?

The sun path record for Kuching establishes a reproducible discovery point at 1.5500, 110.3333 (GeoNames ID 1735634, administrative area 11) and a Malaysia 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 Kuching?

For the sun path record in Kuching, replace the 1.5500, 110.3333 city reference with the surveyed site or parcel, identify the competent local authority, and verify the current documents under Uniform Building By-Laws and state or local-authority adoption. Record the edition, retrieval date, units, assumptions and named checker before relying on the result.

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