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Updated 2026-09-02

Solar & Daylight Data

Daylight & Orientation: Zayed City, UAE

How to research daylight & orientation for a specific site in Zayed City — the controlling authority, source documents, and checks to run before you rely on a number.

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Last updated September 2, 2026 · Location data from the [GeoNames AE dump](https://download.geonames.org/export/dump/AE.zip) (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 291580). Regulatory starting point: [UAE Government overview of local building authorities](https://u.ae/en/information-and-services/justice-safety-and-the-law/building-safety). 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. Project-date refinement reference: [NREL Solar Position Algorithm](https://midcdmz.nrel.gov/spa/).

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Direct answer

For Zayed City at 23.6542, 53.7052, the declination-only solar-noon altitude is approximately 89.8° at the June solstice, 66.3° at an equinox and 42.9° 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 291580 in administrative area 01, at 23.6542, 53.7052; replace it with the surveyed parcel point before relying on the result. As a transparent geometry check, declination-only solar-noon altitude is about 89.8° at the June solstice, 66.3° at an equinox and 42.9° at the December solstice. Representative 21st-day geometry ranges from about 10.5 hours in December to 13.5 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 daylight and building orientation record.

Content and cited inputs reviewed by Harth team · Published 2026-08-26 · Updated 2026-09-02.

What must be verified for Zayed City?

Zayed City is represented here at approximately 23.6542, 53.7052 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 daylight and building orientation 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 daylight-workflow page is a project-starting worksheet, not a design value or approval. The controlling authority and qualified professionals for the Zayed City site remain authoritative.

Zayed City monthly daylight-orientation ledger

Representative dateGeometric daylightSolar sunriseSolar sunsetSunrise hour angleNoon bearingChange from prior month
21 January10.768 h06.6217.3880.76°180.0°+0.228 h
21 February11.335 h06.3317.6785.01°180.0°+0.567 h
21 March11.976 h06.0117.9989.82°180.0°+0.641 h
21 April12.687 h05.6618.3495.15°180.0°+0.710 h
21 May13.232 h05.3818.6299.24°180.0°+0.546 h
21 June13.460 h05.2718.73100.95°180.0°+0.228 h
21 July13.253 h05.3718.6399.40°180.0°-0.208 h
21 August12.697 h05.6518.3595.23°180.0°-0.556 h
21 September11.988 h06.0117.9989.91°180.0°-0.709 h
21 October11.303 h06.3517.6584.77°180.0°-0.685 h
21 November10.747 h06.6317.3780.60°180.0°-0.556 h
21 December10.540 h06.7317.2779.05°180.0°-0.208 h
Geometric daylight hours by month for Zayed City, UAE
Geometric day length for Zayed City, UAE, plotted from the table above.
Sunrise-to-sunset daylight window by month for Zayed City, UAE
The daylight window for Zayed City, UAE, plotted from the table above.

Orientation checks prompted by the Zayed City ledger

The representative daylight span runs from 10.540 hours on 21 December to 13.460 hours on 21 June. Solar sunrise and sunset are expressed in apparent solar time, not a time-zone clock. The noon-bearing column is a true-north azimuth screen and becomes unstable when the sun passes close to zenith.

For Zayed City at 23.6542°, 53.7052°, test each occupied facade against the actual horizon, adjacent buildings, glazing, room depth and target illuminance. This ledger describes geometric availability only; it does not estimate irradiance, daylight autonomy, glare or energy. Refine project-date positions with the NREL SPA.

Where can you explore related guidance?

Sources and method

Location data from the GeoNames AE dump (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 291580). 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. Project-date refinement reference: NREL Solar Position Algorithm.

Source links

Frequently asked questions

What does the daylight and building orientation record for Zayed City establish?

The daylight and building orientation record for Zayed City establishes a reproducible discovery point at 23.6542, 53.7052 (GeoNames ID 291580, administrative area 01) and a United Arab Emirates source path. It does not establish a final project value, approval or parcel decision.

What must be replaced before using this daylight and building orientation workflow for a project in Zayed City?

For the daylight and building orientation record in Zayed City, replace the 23.6542, 53.7052 city reference with the surveyed site or parcel, identify the competent local authority, and verify the current documents under emirate- and municipality-specific building regulations and permit systems. Record the edition, retrieval date, units, assumptions and named checker before relying on the result.

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