TUCSON, Ariz. (KGUN) — Tucson hit 100° at 1:59 PM on April 30, the first 100° day of this year.
According to the National Weather Service, on average the first 100° day is May 18.
The earliest on record was April 19, 1989.
The NWS says usually, Tucson will have about 68 days a year that are 100° or warmer.
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