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James Webb Space Telescope

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Favorable Weather Expected for Dec. 25 Launch

The latest weather forecast has arrived and we are still go for launch tomorrow!

The target launch date for the James Webb Space Telescope is Dec. 25. A 32-minute launch window opens at 7:20 a.m. EST in Kourou, French Guiana (9:20 a.m. GFT/12:20 UTC).

Arianespace's Ariane 5 rocket with NASA's James Webb Space Telescope onboard, is shown at the launch pad.
Arianespace’s Ariane 5 rocket with NASA’s James Webb Space Telescope onboard, is seen at the launch pad, Thursday, Dec. 23, 2021, at Europe’s Spaceport, the Guiana Space Center in Kourou, French Guiana. The James Webb Space Telescope (sometimes called JWST or Webb) is a large infrared telescope with a 21.3 foot (6.5 meter) primary mirror. The observatory will study every phase of cosmic history—from within our solar system to the most distant observable galaxies in the early universe. Photo Credit: (NASA/Bill Ingalls)

Goddard Space Flight Center