Solar Altitude & Azimuth: Ngong, Kenya

Direct answer

For Ngong at -1.3527, 36.6699, the declination-only solar-noon altitude is approximately 65.2° at the June solstice, 88.6° at an equinox and 67.9° 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 183595 in administrative area 19, at -1.3527, 36.6699; replace it with the surveyed parcel point before relying on the result. As a transparent geometry check, declination-only solar-noon altitude is about 65.2° at the June solstice, 88.6° at an equinox and 67.9° at the December solstice. Representative 21st-day geometry ranges from about 11.9 hours in June to 12.1 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 solar altitude and azimuth record.

Content and cited inputs reviewed by Scott Barrington, Harth founder and architectural technology specialist · Published 2026-08-26 · Updated 2026-09-02.

What must be verified for Ngong?

Ngong is represented here at approximately -1.3527, 36.6699 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 solar altitude and azimuth 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 solar-angle-workflow page is a project-starting worksheet, not a design value or approval. The controlling authority and qualified professionals for the Ngong site remain authoritative.

Ngong monthly solar geometry check for solar altitude & azimuth

Ngong solar-geometry fingerprint at -1.3527, 36.6699

• Ngong, 21 January: declination -20.14°, noon altitude 71.21°, zenith 18.79°, geometric daylight 12.066 hours, and vertical-object noon shadow ratio 0.340.
• Ngong, 21 February: declination -11.23°, noon altitude 80.13°, zenith 9.87°, geometric daylight 12.036 hours, and vertical-object noon shadow ratio 0.174.
• Ngong, 21 March: declination -0.40°, noon altitude 89.05°, zenith 0.95°, geometric daylight 12.001 hours, and vertical-object noon shadow ratio 0.017.
• Ngong, 21 April: declination +11.58°, noon altitude 77.07°, zenith 12.93°, geometric daylight 11.963 hours, and vertical-object noon shadow ratio 0.230.
• Ngong, 21 May: declination +20.14°, noon altitude 68.51°, zenith 21.49°, geometric daylight 11.934 hours, and vertical-object noon shadow ratio 0.394.
• Ngong, 21 June: declination +23.45°, noon altitude 65.20°, zenith 24.80°, geometric daylight 11.922 hours, and vertical-object noon shadow ratio 0.462.
• Ngong, 21 July: declination +20.44°, noon altitude 68.21°, zenith 21.79°, geometric daylight 11.933 hours, and vertical-object noon shadow ratio 0.400.
• Ngong, 21 August: declination +11.75°, noon altitude 76.89°, zenith 13.11°, geometric daylight 11.962 hours, and vertical-object noon shadow ratio 0.233.
• Ngong, 21 September: declination -0.20°, noon altitude 88.85°, zenith 1.15°, geometric daylight 12.001 hours, and vertical-object noon shadow ratio 0.020.
• Ngong, 21 October: declination -11.75°, noon altitude 79.60°, zenith 10.40°, geometric daylight 12.038 hours, and vertical-object noon shadow ratio 0.184.
• Ngong, 21 November: declination -20.44°, noon altitude 70.91°, zenith 19.09°, geometric daylight 12.067 hours, and vertical-object noon shadow ratio 0.346.
• Ngong, 21 December: declination -23.45°, noon altitude 67.90°, zenith 22.10°, geometric daylight 12.078 hours, and vertical-object noon shadow ratio 0.406.

Harth computed the Ngong fingerprint for latitude -1.3527° with the Cooper declination approximation, 90° - |latitude - declination| at solar noon, centre-to-centre sunrise hour angle and 1 / tan(altitude) shadow ratio. Longitude 36.6699° 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: Ngong, Kenya
• Solar Shading Design: Ngong, Kenya
• Daylight & Orientation: Ngong, Kenya
• Solar Altitude & Azimuth: Lang'ata, Kenya
• All solar & daylight data guidance for Kenya
• House Construction Cost Planning: Ngong, Kenya
• Office Construction Cost Planning: Ngong, Kenya
• Retail Construction Cost Planning: Ngong, Kenya
• School Construction Cost Planning: Ngong, Kenya

Sources and method

Location data from the GeoNames KE dump (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 183595). Regulatory starting point: National Construction Authority and the applicable county government. 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. Project-date refinement reference: NREL Solar Position Algorithm.

Source links

• download.geonames.org

• nca.go.ke

• gml.noaa.gov

• midcdmz.nrel.gov