Solar & Daylight Data
Sun Path: Hyderabad, India
How to research sun path for a specific site in Hyderabad — 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 IN dump](https://download.geonames.org/export/dump/IN.zip) (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 1269843). Regulatory starting point: [Bureau of Indian Standards and the applicable state or urban local body](https://www.services.bis.gov.in/php/BIS_2.0/bisconnect/knowyourstandards/Indian_standards/isdetails/). 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 Hyderabad at 17.3840, 78.4564, the declination-only solar-noon altitude is approximately 83.9° at the June solstice, 72.6° at an equinox and 49.2° 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 1269843 in administrative area 40, at 17.3840, 78.4564; replace it with the surveyed parcel point before relying on the result. As a transparent geometry check, declination-only solar-noon altitude is about 83.9° at the June solstice, 72.6° at an equinox and 49.2° at the December solstice. Representative 21st-day geometry ranges from about 11.0 hours in December to 13.0 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 Hyderabad?
Hyderabad is represented here at approximately 17.3840, 78.4564 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?
- Fix the surveyed site and local time basis.
- Select an authoritative weather source or a named solar-position algorithm.
- Record period, percentile or scenario and units.
- Test sensitivity to elevation, exposure, urban form and horizon.
- Save the source file, retrieval date and checker in the model record.
| Input | Project-specific evidence | QA question |
|---|---|---|
| Site | surveyed coordinates, elevation and horizon | Does the point represent the building? |
| Weather/solar method | named dataset, algorithm, period and time basis | Are station, time zone and units explicit? |
| Design scenario | current and future scenario agreed by the team | Is an average being mistaken for an extreme? |
| Compliance | adopted local document and edition | Was 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 Hyderabad 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.
Hyderabad monthly solar geometry check for sun path
| Representative date | Declination | Solar-noon altitude | Geometric daylight |
|---|---|---|---|
| 21 January | -20.14° | 52.5° | 11.1 h |
| 21 February | -11.23° | 61.4° | 11.5 h |
| 21 March | -0.40° | 72.2° | 12.0 h |
| 21 April | +11.58° | 84.2° | 12.5 h |
| 21 May | +20.14° | 87.2° | 12.9 h |
| 21 June | +23.45° | 83.9° | 13.0 h |
| 21 July | +20.44° | 86.9° | 12.9 h |
| 21 August | +11.75° | 84.4° | 12.5 h |
| 21 September | -0.20° | 72.4° | 12.0 h |
| 21 October | -11.75° | 60.9° | 11.5 h |
| 21 November | -20.44° | 52.2° | 11.1 h |
| 21 December | -23.45° | 49.2° | 11.0 h |
Month-by-month geometry interpretation
- 21 January: approximate solar-noon altitude 52.5° (zenith angle 37.5°) and 11.1 hours of geometric daylight. That is 0.2 hours longer than the preceding representative date in this annual sequence.
- 21 February: approximate solar-noon altitude 61.4° (zenith angle 28.6°) and 11.5 hours of geometric daylight. That is 0.4 hours longer than the preceding representative date in this annual sequence.
- 21 March: approximate solar-noon altitude 72.2° (zenith angle 17.8°) and 12.0 hours of geometric daylight. That is 0.5 hours longer than the preceding representative date in this annual sequence.
- 21 April: approximate solar-noon altitude 84.2° (zenith angle 5.8°) and 12.5 hours of geometric daylight. That is 0.5 hours longer than the preceding representative date in this annual sequence.
- 21 May: approximate solar-noon altitude 87.2° (zenith angle 2.8°) and 12.9 hours of geometric daylight. That is 0.4 hours longer than the preceding representative date in this annual sequence.
- 21 June: approximate solar-noon altitude 83.9° (zenith angle 6.1°) and 13.0 hours of geometric daylight. That is 0.2 hours longer than the preceding representative date in this annual sequence.
- 21 July: approximate solar-noon altitude 86.9° (zenith angle 3.1°) and 12.9 hours of geometric daylight. That is 0.1 hours shorter than the preceding representative date in this annual sequence.
- 21 August: approximate solar-noon altitude 84.4° (zenith angle 5.6°) and 12.5 hours of geometric daylight. That is 0.4 hours shorter than the preceding representative date in this annual sequence.
- 21 September: approximate solar-noon altitude 72.4° (zenith angle 17.6°) and 12.0 hours of geometric daylight. That is 0.5 hours shorter than the preceding representative date in this annual sequence.
- 21 October: approximate solar-noon altitude 60.9° (zenith angle 29.1°) and 11.5 hours of geometric daylight. That is 0.5 hours shorter than the preceding representative date in this annual sequence.
- 21 November: approximate solar-noon altitude 52.2° (zenith angle 37.8°) and 11.1 hours of geometric daylight. That is 0.4 hours shorter than the preceding representative date in this annual sequence.
- 21 December: approximate solar-noon altitude 49.2° (zenith angle 40.8°) and 11.0 hours of geometric daylight. That is 0.1 hours shorter than the preceding representative date in this annual sequence.
Harth calculation for latitude 17.3840°: Cooper declination approximation, 90° - |latitude - declination| at solar noon, and centre-to-centre sunrise hour angle. See NOAA's solar calculation details for fuller method context. This screening table excludes equation-of-time/civil-time conversion, atmospheric refraction, terrain, facade azimuth and obstructions; it is not an hourly shading result.
Where can you explore related guidance?
- Explore all solar data guidance
- Sun Path: Vijayawada, India
- Sun Path: Nagpur, India
- Sun Path: Aurangabad, India
- Sun Path: Bengaluru, India
Sources and method
Location data from the GeoNames IN dump (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 1269843). Regulatory starting point: Bureau of Indian Standards and the applicable state or urban local body. 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
Frequently asked questions
What does the sun path record for Hyderabad establish?
The sun path record for Hyderabad establishes a reproducible discovery point at 17.3840, 78.4564 (GeoNames ID 1269843, administrative area 40) and a India 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 Hyderabad?
For the sun path record in Hyderabad, replace the 17.3840, 78.4564 city reference with the surveyed site or parcel, identify the competent local authority, and verify the current documents under National Building Code of India plus state and urban-local-body rules. Record the edition, retrieval date, units, assumptions and named checker before relying on the result.
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