Frost and Freeze Dates in Iowa - Warren to Wright

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.

Warren | Washington | Wayne | Webster | Winnebago | Winneshiek | Woodbury | Worth | Wright

Warren 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)
27-Sep	10-Oct	23-Oct	9-Apr	23-Apr	6-May

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Washington 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)
28-Sep	12-Oct	27-Oct	7-Apr	20-Apr	4-May

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Wayne 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)
30-Sep	12-Oct	27-Oct	7-Apr	20-Apr	3-May

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Webster 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	7-Oct	20-Oct	13-Apr	26-Apr	9-May

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Winnebago 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	15-Oct	14-Apr	28-Apr	10-May

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Winneshiek 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	18-Apr	2-May	18-May

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Woodbury 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	4-Oct	16-Oct	9-Apr	26-Apr	10-May

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Worth 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	5-Oct	18-Oct	17-Apr	28-Apr	11-May

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Wright 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	14-Apr	29-Apr	11-May

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