What were the Chicago area weather conditions on July 20, 1969?

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Dear Tom,

Can you please advise what Chicago area weather conditions were like on the evening of the Apollo 11 moon landing on July 20, 1969? I seem to remember being able to see the moon very clearly that night after watching the landing coverage on television.

Doug Barnum

Dear Doug,

The weather in Chicago was picture-perfect on that historic day. When Apollo 11 landed on the lunar surface at 3:17 pm CDT, the Chicago area was experiencing clear skies with great visibility. The temperature was a comfortable 80 degrees and the wind was blowing in off the lake from the north-northeast at 12-15 mph. The moon phase that day was a waxing crescent with 32 percent of the moon’s surface visible. The moon actually rose at 11:30 am that day was likely visible as skies darkened during the evening until it set at 11:14 pm.


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