It's getting rather late in the season for Iowa's 'First Frost' and some areas in the Hawkeye State will finally get hit tonight as 14 counties in Northwest Iowa are in a 'Frost Advisory' tonight into tomorrow morning.

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On the other side of the Missouri River tonight, areas surrounding Omaha are in a FREEZE WARNING where widespread frost is expected.

Waterloo typically sees its first frost of the season around the final week of September. For Cedar Rapids, it happens generally right around the first of October.

The latest 'First Frost' of the season in Waterloo occurred on October 25th, 1914. In Cedar Rapids, the latest First Frost happened on October 28, 1963.

The latest in the season that Cedar Rapids has gone before hitting 32* or colder was November 8, 1900.

The latest in the fall for the temperature to finally reach at or below 32* in Waterloo was October 29th in 1963 and 1973.

The coldest temperature this fall (as of 10/15) in Cedar Rapids was a chilly 38* on the morning of September 25th.

The coldest temp so far this fall in Waterloo was 39* also on the morning of September 25th.

Frost is predicted when air temperatures reach 32°F, but because it is colder closer to the ground, a frost may occur even when air temperatures are just above freezing.

Light freeze: 29° to 32°F — tender plants are killed.
Moderate freeze: 25° to 28°F —widely destructive to most vegetation.
Severe freeze: 24°F and colder—heavy damage to most garden plants.

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