Solar & Daylight Data

Updated 2026-08-31

Sun Path: Enugu, Nigeria

How to research sun path for a specific site in Enugu — 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 NG dump](https://download.geonames.org/export/dump/NG.zip) (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 2343279). Regulatory starting point: [Federal Ministry of Housing and Urban Development and the applicable state authority](https://fmhud.gov.ng/). 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 Enugu at 6.4413, 7.4988, the declination-only solar-noon altitude is approximately 73.0° at the June solstice, 83.6° at an equinox and 60.1° 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 2343279 in administrative area 47, at 6.4413, 7.4988; replace it with the surveyed parcel point before relying on the result. As a transparent geometry check, declination-only solar-noon altitude is about 73.0° at the June solstice, 83.6° at an equinox and 60.1° at the December solstice. Representative 21st-day geometry ranges from about 11.6 hours in December to 12.4 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 Enugu?

Enugu is represented here at approximately 6.4413, 7.4988 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 Enugu 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.

Enugu monthly solar geometry check for sun path

Representative dateDeclinationSolar-noon altitudeGeometric daylightNoon shadow / height
21 January-20.14°63.42°11.684 h0.500
21 February-11.23°72.33°11.829 h0.319
21 March-0.40°83.16°11.994 h0.120
21 April+11.58°84.86°12.177 h0.090
21 May+20.14°76.30°12.316 h0.244
21 June+23.45°72.99°12.374 h0.306
21 July+20.44°76.00°12.322 h0.249
21 August+11.75°84.69°12.179 h0.093
21 September-0.20°83.36°11.997 h0.116
21 October-11.75°71.80°11.821 h0.329
21 November-20.44°63.12°11.678 h0.507
21 December-23.45°60.11°11.626 h0.575

Enugu solar-geometry fingerprint at 6.4413, 7.4988

  • Enugu, 21 January: declination -20.14°, noon altitude 63.42°, zenith 26.58°, geometric daylight 11.684 hours, and vertical-object noon shadow ratio 0.500.
  • Enugu, 21 February: declination -11.23°, noon altitude 72.33°, zenith 17.67°, geometric daylight 11.829 hours, and vertical-object noon shadow ratio 0.319.
  • Enugu, 21 March: declination -0.40°, noon altitude 83.16°, zenith 6.84°, geometric daylight 11.994 hours, and vertical-object noon shadow ratio 0.120.
  • Enugu, 21 April: declination +11.58°, noon altitude 84.86°, zenith 5.14°, geometric daylight 12.177 hours, and vertical-object noon shadow ratio 0.090.
  • Enugu, 21 May: declination +20.14°, noon altitude 76.30°, zenith 13.70°, geometric daylight 12.316 hours, and vertical-object noon shadow ratio 0.244.
  • Enugu, 21 June: declination +23.45°, noon altitude 72.99°, zenith 17.01°, geometric daylight 12.374 hours, and vertical-object noon shadow ratio 0.306.
  • Enugu, 21 July: declination +20.44°, noon altitude 76.00°, zenith 14.00°, geometric daylight 12.322 hours, and vertical-object noon shadow ratio 0.249.
  • Enugu, 21 August: declination +11.75°, noon altitude 84.69°, zenith 5.31°, geometric daylight 12.179 hours, and vertical-object noon shadow ratio 0.093.
  • Enugu, 21 September: declination -0.20°, noon altitude 83.36°, zenith 6.64°, geometric daylight 11.997 hours, and vertical-object noon shadow ratio 0.116.
  • Enugu, 21 October: declination -11.75°, noon altitude 71.80°, zenith 18.20°, geometric daylight 11.821 hours, and vertical-object noon shadow ratio 0.329.
  • Enugu, 21 November: declination -20.44°, noon altitude 63.12°, zenith 26.88°, geometric daylight 11.678 hours, and vertical-object noon shadow ratio 0.507.
  • Enugu, 21 December: declination -23.45°, noon altitude 60.11°, zenith 29.89°, geometric daylight 11.626 hours, and vertical-object noon shadow ratio 0.575.

Harth computed the Enugu fingerprint for latitude 6.4413° with the Cooper declination approximation, 90° - |latitude - declination| at solar noon, centre-to-centre sunrise hour angle and 1 / tan(altitude) shadow ratio. Longitude 7.4988° 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 NG dump (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 2343279). Regulatory starting point: Federal Ministry of Housing and Urban Development and the applicable state 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 Enugu establish?

The sun path record for Enugu establishes a reproducible discovery point at 6.4413, 7.4988 (GeoNames ID 2343279, administrative area 47) and a Nigeria 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 Enugu?

For the sun path record in Enugu, replace the 6.4413, 7.4988 city reference with the surveyed site or parcel, identify the competent local authority, and verify the current documents under National Building Code plus state and local development-control requirements. Record the edition, retrieval date, units, assumptions and named checker before relying on the result.

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