Frost and Freeze Dates in Iowa - Adair to Buchanan

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 leavesEarly = 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.



Adair  |  Adams  |  Allamakee  |  Appanoose  |  Audubon  |  Benton  |  Black Hawk  |  Boone  |  Bremer  |  Buchanan



Adair 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)
26-Sep7-Oct23-Oct11-Apr25-Apr10-May

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Adams 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)
26-Sep8-Oct25-Oct11-Apr24-Apr8-May

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Allamakee 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)
26-Sep7-Oct21-Oct9-Apr26-Apr11-May

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Appanoose 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-Sep14-Oct28-Oct5-Apr17-Apr3-May

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Audubon 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-Sep3-Oct15-Oct13-Apr27-Apr11-May

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Benton 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-Sep5-Oct17-Oct13-Apr25-Apr8-May

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Black Hawk 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-Sep5-Oct18-Oct14-Apr28-Apr11-May

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Boone 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-Sep6-Oct20-Oct13-Apr26-Apr8-May

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Bremer 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-Sep5-Oct19-Oct13-Apr28-Apr11-May

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Buchanan 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)
20-Sep3-Oct14-Oct16-Apr29-Apr14-May

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