Frost and Freeze Dates in Iowa - Clay to Dickinson

Below is the likelihood of experiencing 32°F on or before the given date in fall and on or after the given date in spring.

Oak with frost on leaves Early = only 10% of all freeze dates occurred before this day.
Average = the average freeze date for this location.
Late = only 10% of all freeze dates occurred after this day.

This information is based on weather data collected from 1950-2021 provided by the Midwestern Regional Climate Center (MRCC). Visit that website to get more detailed information and statistics.

Clay | Clayton | Clinton | Crawford | Dallas | Davis | Decatur | Delaware | Des Moines | Dickinson

Clay County

Early = only 10% of all freeze dates occurred before this day.
Average = the average freeze date for this location.
Late = only 10% of all freeze dates occurred after this day.

Early First Fall Freeze (32°F)	Average First Fall Freeze (32°F)	Late First Fall Freeze (32°F)	Early Last Spring Freeze Date (32°F)	Average Last Spring Freeze Date (32°F)	Late Last Spring Freeze Date (32°F)
22-Sep	5-Oct	18-Oct	12-Apr	28-Apr	11-May

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Clayton County

Early = only 10% of all freeze dates occurred before this day.
Average = the average freeze date for this location.
Late = only 10% of all freeze dates occurred after this day.

Early First Fall Freeze (32°F)	Average First Fall Freeze (32°F)	Late First Fall Freeze (32°F)	Early Last Spring Freeze Date (32°F)	Average Last Spring Freeze Date (32°F)	Late Last Spring Freeze Date (32°F)
21-Sep	3-Oct	15-Oct	16-Apr	29-Apr	12-May

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Clinton County

Early = only 10% of all freeze dates occurred before this day.
Average = the average freeze date for this location.
Late = only 10% of all freeze dates occurred after this day.

Early First Fall Freeze (32°F)	Average First Fall Freeze (32°F)	Late First Fall Freeze (32°F)	Early Last Spring Freeze Date (32°F)	Average Last Spring Freeze Date (32°F)	Late Last Spring Freeze Date (32°F)
1-Oct	14-Oct	28-Oct	6-Apr	18-Apr	2-May

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Crawford County

Early = only 10% of all freeze dates occurred before this day.
Average = the average freeze date for this location.
Late = only 10% of all freeze dates occurred after this day.

Early First Fall Freeze (32°F)	Average First Fall Freeze (32°F)	Late First Fall Freeze (32°F)	Early Last Spring Freeze Date (32°F)	Average Last Spring Freeze Date (32°F)	Late Last Spring Freeze Date (32°F)
23-Sep	6-Oct	20-Oct	9-Apr	25-Apr	9-May

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Dallas County

Early = only 10% of all freeze dates occurred before this day.
Average = the average freeze date for this location.
Late = only 10% of all freeze dates occurred after this day.

Early First Fall Freeze (32°F)	Average First Fall Freeze (32°F)	Late First Fall Freeze (32°F)	Early Last Spring Freeze Date (32°F)	Average Last Spring Freeze Date (32°F)	Late Last Spring Freeze Date (32°F)
22-Sep	6-Oct	18-Oct	10-Apr	25-Apr	8-May

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Davis County

Early = only 10% of all freeze dates occurred before this day.
Average = the average freeze date for this location.
Late = only 10% of all freeze dates occurred after this day.

Early First Fall Freeze (32°F)	Average First Fall Freeze (32°F)	Late First Fall Freeze (32°F)	Early Last Spring Freeze Date (32°F)	Average Last Spring Freeze Date (32°F)	Late Last Spring Freeze Date (32°F)
1-Oct	15-Oct	28-Oct	3-Apr	15-Apr	29-Apr

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Decatur County

Early = only 10% of all freeze dates occurred before this day.
Average = the average freeze date for this location.
Late = only 10% of all freeze dates occurred after this day.

Early First Fall Freeze (32°F)	Average First Fall Freeze (32°F)	Late First Fall Freeze (32°F)	Early Last Spring Freeze Date (32°F)	Average Last Spring Freeze Date (32°F)	Late Last Spring Freeze Date (32°F)
29-Sep	12-Oct	29-Oct	7-Apr	20-Apr	3-May

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Delaware County

Early = only 10% of all freeze dates occurred before this day.
Average = the average freeze date for this location.
Late = only 10% of all freeze dates occurred after this day.

Early First Fall Freeze (32°F)	Average First Fall Freeze (32°F)	Late First Fall Freeze (32°F)	Early Last Spring Freeze Date (32°F)	Average Last Spring Freeze Date (32°F)	Late Last Spring Freeze Date (32°F)
21-Sep	3-Oct	14-Oct	16-Apr	1-May	15-May

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Des Moines County

Early = only 10% of all freeze dates occurred before this day.
Average = the average freeze date for this location.
Late = only 10% of all freeze dates occurred after this day.

Early First Fall Freeze (32°F)	Average First Fall Freeze (32°F)	Late First Fall Freeze (32°F)	Early Last Spring Freeze Date (32°F)	Average Last Spring Freeze Date (32°F)	Late Last Spring Freeze Date (32°F)
3-Oct	19-Oct	3-Nov	3-Apr	15-Apr	28-Apr

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Dickinson County

Early = only 10% of all freeze dates occurred before this day.
Average = the average freeze date for this location.
Late = only 10% of all freeze dates occurred after this day.

Early First Fall Freeze (32°F)	Average First Fall Freeze (32°F)	Late First Fall Freeze (32°F)	Early Last Spring Freeze Date (32°F)	Average Last Spring Freeze Date (32°F)	Late Last Spring Freeze Date (32°F)
22-Sep	4-Oct	19-Oct	14-Apr	28-Apr	10-May

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