Solar & Daylight Data

Updated 2026-08-31

Sun Path: Taupo, New Zealand

How to research sun path for a specific site in Taupo — 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 NZ dump](https://download.geonames.org/export/dump/NZ.zip) (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 2181742). Regulatory starting point: [Ministry of Business, Innovation and Employment and the local council](https://www.building.govt.nz/building-code-compliance). 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 Taupo at -38.6833, 176.0833, the declination-only solar-noon altitude is approximately 27.9° at the June solstice, 51.3° at an equinox and 74.8° 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 2181742 in administrative area G1, at -38.6833, 176.0833; replace it with the surveyed parcel point before relying on the result. As a transparent geometry check, declination-only solar-noon altitude is about 27.9° at the June solstice, 51.3° at an equinox and 74.8° at the December solstice. Representative 21st-day geometry ranges from about 9.3 hours in June to 14.7 hours in December; 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 Taupo?

Taupo is represented here at approximately -38.6833, 176.0833 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 Taupo 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.

Taupo monthly solar geometry check for sun path

Representative dateDeclinationSolar-noon altitudeGeometric daylightNoon shadow / height
21 January-20.14°71.45°14.277 h0.335
21 February-11.23°62.54°13.219 h0.520
21 March-0.40°51.72°12.043 h0.789
21 April+11.58°39.74°10.741 h1.203
21 May+20.14°31.18°9.723 h1.653
21 June+23.45°27.87°9.290 h1.891
21 July+20.44°30.88°9.685 h1.673
21 August+11.75°39.56°10.721 h1.210
21 September-0.20°51.52°12.022 h0.795
21 October-11.75°63.07°13.279 h0.508
21 November-20.44°71.76°14.315 h0.330
21 December-23.45°74.77°14.710 h0.272

Taupo solar-geometry fingerprint at -38.6833, 176.0833

  • Taupo, 21 January: declination -20.14°, noon altitude 71.45°, zenith 18.55°, geometric daylight 14.277 hours, and vertical-object noon shadow ratio 0.335.
  • Taupo, 21 February: declination -11.23°, noon altitude 62.54°, zenith 27.46°, geometric daylight 13.219 hours, and vertical-object noon shadow ratio 0.520.
  • Taupo, 21 March: declination -0.40°, noon altitude 51.72°, zenith 38.28°, geometric daylight 12.043 hours, and vertical-object noon shadow ratio 0.789.
  • Taupo, 21 April: declination +11.58°, noon altitude 39.74°, zenith 50.26°, geometric daylight 10.741 hours, and vertical-object noon shadow ratio 1.203.
  • Taupo, 21 May: declination +20.14°, noon altitude 31.18°, zenith 58.82°, geometric daylight 9.723 hours, and vertical-object noon shadow ratio 1.653.
  • Taupo, 21 June: declination +23.45°, noon altitude 27.87°, zenith 62.13°, geometric daylight 9.290 hours, and vertical-object noon shadow ratio 1.891.
  • Taupo, 21 July: declination +20.44°, noon altitude 30.88°, zenith 59.12°, geometric daylight 9.685 hours, and vertical-object noon shadow ratio 1.673.
  • Taupo, 21 August: declination +11.75°, noon altitude 39.56°, zenith 50.44°, geometric daylight 10.721 hours, and vertical-object noon shadow ratio 1.210.
  • Taupo, 21 September: declination -0.20°, noon altitude 51.52°, zenith 38.48°, geometric daylight 12.022 hours, and vertical-object noon shadow ratio 0.795.
  • Taupo, 21 October: declination -11.75°, noon altitude 63.07°, zenith 26.93°, geometric daylight 13.279 hours, and vertical-object noon shadow ratio 0.508.
  • Taupo, 21 November: declination -20.44°, noon altitude 71.76°, zenith 18.24°, geometric daylight 14.315 hours, and vertical-object noon shadow ratio 0.330.
  • Taupo, 21 December: declination -23.45°, noon altitude 74.77°, zenith 15.23°, geometric daylight 14.710 hours, and vertical-object noon shadow ratio 0.272.

Harth computed the Taupo fingerprint for latitude -38.6833° with the Cooper declination approximation, 90° - |latitude - declination| at solar noon, centre-to-centre sunrise hour angle and 1 / tan(altitude) shadow ratio. Longitude 176.0833° 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 NZ dump (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 2181742). Regulatory starting point: Ministry of Business, Innovation and Employment and the local council. 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 Taupo establish?

The sun path record for Taupo establishes a reproducible discovery point at -38.6833, 176.0833 (GeoNames ID 2181742, administrative area G1) and a New Zealand 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 Taupo?

For the sun path record in Taupo, replace the -38.6833, 176.0833 city reference with the surveyed site or parcel, identify the competent local authority, and verify the current documents under New Zealand Building Code, Acceptable Solutions, and Verification Methods. Record the edition, retrieval date, units, assumptions and named checker before relying on the result.

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