Sun Path: Pimpri-Chinchwad, India

Direct answer

For Pimpri-Chinchwad at 18.6187, 73.8037, the declination-only solar-noon altitude is approximately 85.2° at the June solstice, 71.4° at an equinox and 47.9° 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 7626690 in administrative area 16, at 18.6187, 73.8037; replace it with the surveyed parcel point before relying on the result. As a transparent geometry check, declination-only solar-noon altitude is about 85.2° at the June solstice, 71.4° at an equinox and 47.9° at the December solstice. Representative 21st-day geometry ranges from about 10.9 hours in December to 13.1 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 Pimpri-Chinchwad?

Pimpri-Chinchwad is represented here at approximately 18.6187, 73.8037 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 Pimpri-Chinchwad site remain authoritative.

Pimpri-Chinchwad monthly solar geometry check for sun path

Pimpri-Chinchwad solar-geometry fingerprint at 18.6187, 73.8037

• Pimpri-Chinchwad, 21 January: declination -20.14°, noon altitude 51.24°, zenith 38.76°, geometric daylight 11.054 hours, and vertical-object noon shadow ratio 0.803.
• Pimpri-Chinchwad, 21 February: declination -11.23°, noon altitude 60.16°, zenith 29.84°, geometric daylight 11.489 hours, and vertical-object noon shadow ratio 0.574.
• Pimpri-Chinchwad, 21 March: declination -0.40°, noon altitude 70.98°, zenith 19.02°, geometric daylight 11.982 hours, and vertical-object noon shadow ratio 0.345.
• Pimpri-Chinchwad, 21 April: declination +11.58°, noon altitude 82.96°, zenith 7.04°, geometric daylight 12.528 hours, and vertical-object noon shadow ratio 0.123.
• Pimpri-Chinchwad, 21 May: declination +20.14°, noon altitude 88.48°, zenith 1.52°, geometric daylight 12.946 hours, and vertical-object noon shadow ratio 0.027.
• Pimpri-Chinchwad, 21 June: declination +23.45°, noon altitude 85.17°, zenith 4.83°, geometric daylight 13.120 hours, and vertical-object noon shadow ratio 0.085.
• Pimpri-Chinchwad, 21 July: declination +20.44°, noon altitude 88.18°, zenith 1.82°, geometric daylight 12.962 hours, and vertical-object noon shadow ratio 0.032.
• Pimpri-Chinchwad, 21 August: declination +11.75°, noon altitude 83.14°, zenith 6.86°, geometric daylight 12.536 hours, and vertical-object noon shadow ratio 0.120.
• Pimpri-Chinchwad, 21 September: declination -0.20°, noon altitude 71.18°, zenith 18.82°, geometric daylight 11.991 hours, and vertical-object noon shadow ratio 0.341.
• Pimpri-Chinchwad, 21 October: declination -11.75°, noon altitude 59.63°, zenith 30.37°, geometric daylight 11.464 hours, and vertical-object noon shadow ratio 0.586.
• Pimpri-Chinchwad, 21 November: declination -20.44°, noon altitude 50.94°, zenith 39.06°, geometric daylight 11.038 hours, and vertical-object noon shadow ratio 0.812.
• Pimpri-Chinchwad, 21 December: declination -23.45°, noon altitude 47.93°, zenith 42.07°, geometric daylight 10.880 hours, and vertical-object noon shadow ratio 0.903.

Harth computed the Pimpri-Chinchwad fingerprint for latitude 18.6187° with the Cooper declination approximation, 90° - |latitude - declination| at solar noon, centre-to-centre sunrise hour angle and 1 / tan(altitude) shadow ratio. Longitude 73.8037° 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
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• All solar & daylight data guidance for India
• Climate Design Data: Pimpri-Chinchwad, India

Sources and method

Location data from the GeoNames IN dump (CC BY 4.0, snapshot 2026-08-31, GeoNames ID 7626690). 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

• download.geonames.org

• services.bis.gov.in

• gml.noaa.gov