Local Time, Weather & Live Webcams in Caldwell, Idaho, United States

CALDWELL TIME

3:1319AM

Monday

October 19, 2026

12369

America/Boise

Temperature

7°C

☀️

Conditions

Clear sky

Hum

66%

Wind

4.5 mph

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Idaho CURIO • #1 OF 2

Arco: First City in the World Powered by Nuclear Energy

On July 17, 1955, the desert town of Arco became the first community on Earth to have its entire municipal electrical grid powered by atomic energy, generated by the nearby BORAX-III reactor.

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