The Jantar Mantar, Jaipur
Historical Site Collection of monumental astronomical instruments for timekeeping
An ensemble of large stone astronomical instruments built in the 18th century; visitors inspect massive sundials, learn pre‑modern observational techniques, and photograph precise angular scales and masonry craftsmanship.
The Jantar Mantar in Jaipur is an 18th-century astronomical observatory built by Maharaja Sawai Jai Singh II as a set of large-scale instruments for observing celestial movements. The complex consists of masonry and stone devices laid out in a planned arrangement inside a walled precinct in Jaipur, Rajasthan.
Prominent instruments include a giant triangular sundial, hemispherical and cylindrical devices that allow direct sighting and measurement of positions, and a set of calibrated scales and markings used for tracking time and celestial coordinates. The scale and precision of the masonry instruments make the observatory one of the best-preserved examples of pre-modern observational astronomy.
The observatory was constructed in the early 1700s under the patronage of Jai Singh II to improve astronomical tables and astrological calculations, and it formed part of a wider programme of scientific and urban initiatives. It continues to be studied for its mix of empirical observation and traditional astronomical practice.
Located in the walled city of Jaipur, the site is accessible from the city’s main streets and is close to other historic landmarks in the city centre.
- Date and instruments: Built in the early 18th century by Maharaja Sawai Jai Singh II, the site contains 19 large-scale masonry instruments arranged within a walled compound.
What to See #
- Samrat Yantra: The Samrat Yantra, a large triangular sundial about 27 m high that serves as the observatory's principal timekeeping instrument.
- Jai Prakash and other instruments: The Jai Prakash sundials and other hemispherical instruments used for observing altitudes and tracking celestial coordinates.
- Ram Yantra and Chakra Yantra: Rotating and cylindrical instruments such as the Ram Yantra and the Chakra Yantra used for measuring zenith and azimuth positions of celestial bodies.
How to Get to The Jantar Mantar, Jaipur #
Jantar Mantar is in central Jaipur, a short walk from the City Palace and about 15-20 minutes by car from Jaipur Junction railway station. Auto-rickshaws and taxis are abundant; the nearest major bus stops are along MI Road.
Tips for Visiting The Jantar Mantar, Jaipur #
- Arrive early (before 9:30am) to use the instruments in clear light and avoid the midday heat.
- Bring a camera with a wide-angle lens - many of the instruments are massive and photos taken at close range capture geometry best.
- Visit with a guide or an audio guide to understand how the masonry instruments track time and celestial positions; without explanation the shapes look like modernist sculptures.
Best Time to Visit The Jantar Mantar, Jaipur #
Winter (November-February) is the best time for comfortable visiting and clear skies; avoid the summer peak heat.
Weather & Climate near The Jantar Mantar, Jaipur #
The Jantar Mantar, Jaipur's climate is classified as Hot Semi-Arid - Hot Semi-Arid climate with very hot summers (peaking in June) and mild winters (coldest in January). Temperatures range from 8°C to 40°C. Moderate rainfall (639 mm/year) with a pronounced dry season.
January
January is the coolest month with highs of 22°C and lows of 8°C. Almost no rain and clear sunny skies.
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February
February is cool with highs of 25°C and lows of 10°C. Almost no rain and clear sunny skies.
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March
March is mild with highs of 31°C and lows of 16°C. Almost no rain and clear sunny skies.
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April
April is hot with highs of 36°C and lows of 22°C. Almost no rain and mostly sunny skies.
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May
May is hot with highs of 40°C and lows of 26°C. Light rainfall and mostly sunny skies.
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June
June is the hottest month with highs of 39°C and lows of 27°C. Moderate rainfall (49 mm).
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July
July is hot, feeling like 32°C. Heavy rain (217 mm) and partly cloudy skies.
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August
August is hot, feeling like 32°C due to high humidity. The wettest month with heavy rain (221 mm) and partly cloudy skies.
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September
September is hot, feeling like 30°C. Regular rainfall (94 mm) and mostly sunny skies.
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October
October is warm with highs of 33°C and lows of 19°C. Almost no rain and clear sunny skies.
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November
November is mild with highs of 29°C and lows of 13°C. Almost no rain and clear sunny skies.
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December
December is cool with highs of 24°C and lows of 9°C. The driest month with just 3 mm and clear sunny skies.
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