Sun Path: Umuahia, Nigeria

Direct answer

For Umuahia at 5.5249, 7.4946, the declination-only solar-noon altitude is approximately 72.1° at the June solstice, 84.5° at an equinox and 61.0° 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 2320576 in administrative area 45, at 5.5249, 7.4946; replace it with the surveyed parcel point before relying on the result. As a transparent geometry check, declination-only solar-noon altitude is about 72.1° at the June solstice, 84.5° at an equinox and 61.0° at the December solstice. Representative 21st-day geometry ranges from about 11.7 hours in December to 12.3 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 Umuahia?

Umuahia is represented here at approximately 5.5249, 7.4946 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 Umuahia 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.

Umuahia monthly solar geometry check for sun path

Umuahia solar-geometry fingerprint at 5.5249, 7.4946

• Umuahia, 21 January: declination -20.14°, noon altitude 64.34°, zenith 25.66°, geometric daylight 11.729 hours, and vertical-object noon shadow ratio 0.480.
• Umuahia, 21 February: declination -11.23°, noon altitude 73.25°, zenith 16.75°, geometric daylight 11.853 hours, and vertical-object noon shadow ratio 0.301.
• Umuahia, 21 March: declination -0.40°, noon altitude 84.07°, zenith 5.93°, geometric daylight 11.995 hours, and vertical-object noon shadow ratio 0.104.
• Umuahia, 21 April: declination +11.58°, noon altitude 83.95°, zenith 6.05°, geometric daylight 12.151 hours, and vertical-object noon shadow ratio 0.106.
• Umuahia, 21 May: declination +20.14°, noon altitude 75.39°, zenith 14.61°, geometric daylight 12.271 hours, and vertical-object noon shadow ratio 0.261.
• Umuahia, 21 June: declination +23.45°, noon altitude 72.08°, zenith 17.92°, geometric daylight 12.321 hours, and vertical-object noon shadow ratio 0.323.
• Umuahia, 21 July: declination +20.44°, noon altitude 75.08°, zenith 14.92°, geometric daylight 12.275 hours, and vertical-object noon shadow ratio 0.266.
• Umuahia, 21 August: declination +11.75°, noon altitude 83.77°, zenith 6.23°, geometric daylight 12.154 hours, and vertical-object noon shadow ratio 0.109.
• Umuahia, 21 September: declination -0.20°, noon altitude 84.27°, zenith 5.73°, geometric daylight 11.997 hours, and vertical-object noon shadow ratio 0.100.
• Umuahia, 21 October: declination -11.75°, noon altitude 72.72°, zenith 17.28°, geometric daylight 11.846 hours, and vertical-object noon shadow ratio 0.311.
• Umuahia, 21 November: declination -20.44°, noon altitude 64.03°, zenith 25.97°, geometric daylight 11.725 hours, and vertical-object noon shadow ratio 0.487.
• Umuahia, 21 December: declination -23.45°, noon altitude 61.03°, zenith 28.97°, geometric daylight 11.679 hours, and vertical-object noon shadow ratio 0.554.

Harth computed the Umuahia fingerprint for latitude 5.5249° with the Cooper declination approximation, 90° - |latitude - declination| at solar noon, centre-to-centre sunrise hour angle and 1 / tan(altitude) shadow ratio. Longitude 7.4946° 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: Aba, Nigeria
• Sun Path: Owerri, Nigeria
• Sun Path: Uyo, Nigeria
• Sun Path: Port Harcourt, Nigeria
• All solar & daylight data guidance for Nigeria
• Climate Design Data: Umuahia, Nigeria

Sources and method

Location data from the GeoNames NG dump (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 2320576). 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.

Source links

• download.geonames.org

• fmhud.gov.ng

• gml.noaa.gov