Sun Path: Ar Rumaylah, UAE

Direct answer

For Ar Rumaylah at 25.4034, 55.4334, the declination-only solar-noon altitude is approximately 88.0° at the June solstice, 64.6° at an equinox and 41.2° 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 8475866 in administrative area 02, at 25.4034, 55.4334; replace it with the surveyed parcel point before relying on the result. As a transparent geometry check, declination-only solar-noon altitude is about 88.0° at the June solstice, 64.6° at an equinox and 41.2° at the December solstice. Representative 21st-day geometry ranges from about 10.4 hours in December to 13.6 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 Ar Rumaylah?

Ar Rumaylah is represented here at approximately 25.4034, 55.4334 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 Ar Rumaylah site remain authoritative.

Ar Rumaylah monthly solar geometry check for sun path

Ar Rumaylah solar-geometry fingerprint at 25.4034, 55.4334

• Ar Rumaylah, 21 January: declination -20.14°, noon altitude 44.46°, zenith 45.54°, geometric daylight 10.663 hours, and vertical-object noon shadow ratio 1.019.
• Ar Rumaylah, 21 February: declination -11.23°, noon altitude 53.37°, zenith 36.63°, geometric daylight 11.279 hours, and vertical-object noon shadow ratio 0.743.
• Ar Rumaylah, 21 March: declination -0.40°, noon altitude 64.19°, zenith 25.81°, geometric daylight 11.974 hours, and vertical-object noon shadow ratio 0.484.
• Ar Rumaylah, 21 April: declination +11.58°, noon altitude 76.18°, zenith 13.82°, geometric daylight 12.745 hours, and vertical-object noon shadow ratio 0.246.
• Ar Rumaylah, 21 May: declination +20.14°, noon altitude 84.73°, zenith 5.27°, geometric daylight 13.337 hours, and vertical-object noon shadow ratio 0.092.
• Ar Rumaylah, 21 June: declination +23.45°, noon altitude 88.05°, zenith 1.95°, geometric daylight 13.585 hours, and vertical-object noon shadow ratio 0.034.
• Ar Rumaylah, 21 July: declination +20.44°, noon altitude 85.04°, zenith 4.96°, geometric daylight 13.359 hours, and vertical-object noon shadow ratio 0.087.
• Ar Rumaylah, 21 August: declination +11.75°, noon altitude 76.35°, zenith 13.65°, geometric daylight 12.756 hours, and vertical-object noon shadow ratio 0.243.
• Ar Rumaylah, 21 September: declination -0.20°, noon altitude 64.39°, zenith 25.61°, geometric daylight 11.987 hours, and vertical-object noon shadow ratio 0.479.
• Ar Rumaylah, 21 October: declination -11.75°, noon altitude 52.84°, zenith 37.16°, geometric daylight 11.244 hours, and vertical-object noon shadow ratio 0.758.
• Ar Rumaylah, 21 November: declination -20.44°, noon altitude 44.16°, zenith 45.84°, geometric daylight 10.641 hours, and vertical-object noon shadow ratio 1.030.
• Ar Rumaylah, 21 December: declination -23.45°, noon altitude 41.15°, zenith 48.85°, geometric daylight 10.415 hours, and vertical-object noon shadow ratio 1.144.

Harth computed the Ar Rumaylah fingerprint for latitude 25.4034° with the Cooper declination approximation, 90° - |latitude - declination| at solar noon, centre-to-centre sunrise hour angle and 1 / tan(altitude) shadow ratio. Longitude 55.4334° 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: Ajman, UAE
• Sun Path: Sharjah, UAE
• Sun Path: Al Majaz, UAE
• Sun Path: Al Ḩamīdīyah, UAE
• All solar & daylight data guidance for United Arab Emirates

Sources and method

Location data from the GeoNames AE dump (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 8475866). Regulatory starting point: UAE Government overview of local building authorities. 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

• u.ae

• gml.noaa.gov