First Freeze and Frost Dates

...AVERAGE FIRST FROST AND FREEZE DATES...

As we get farther into September and closer to the official start of fall, area interests should be prepared for the eventuality of the first frost or freeze. Already some near freezing temperatures were noted over parts of far northwest Minnesota early Thursday morning September 4th, with temperatures in the mid 30s over portions of north central Minnesota. 

Below is a table of first frost and freeze dates for selected cities within the Grand Forks National Weather Service Forecast Office area of responsibility.

Remember these dates below are the climatological average first frost and freeze dates. Many variables dictate the actual first frost or freeze, including cloud cover, wind speed, soil moisture and location of the temperature sensor. Some temperature reporting sites are located in town while some are more rural. Sites in town tend to experience frosts and freezes a little later in the year, while rural sites tend to see frosts and have freezing temperatures a bit earlier.

NOAAs National Weather Service defines the first frost as occurring when air temperatures drop to between 36 and 33 degrees, a freeze occurs from 32 degrees to 29 degrees, and a hard freeze as 28 degrees or colder at 6 feet above ground level. This is the standard level of official temperature measurement sensors.

MINNESOTA
CITY                  FIRST FROST   FIRST FREEZE / HARD FREEZE
ADA                   SEPTEMBER 14  SEPTEMBER 24 OCTOBER 4
ARGYLE                SEPTEMBER 8   SEPTEMBER 20 SEPTEMBER 28
BAUDETTE              SEPTEMBER 7   SEPTEMBER 20 SEPTEMBER 30
BEMIDJI AIRPORT       SEPTEMBER 7   SEPTEMBER 20 SEPTEMBER 26
CAMPBELL              SEPTEMBER 13  SEPTEMBER 22 OCTOBER 4
CROOKSTON             SEPTEMBER 13  SEPTEMBER 20 SEPTEMBER 30
DETROIT LAKES         SEPTEMBER 1   SEPTEMBER 13 SEPTEMBER 24
FERGUS FALLS          SEPTEMBER 18  SEPTEMBER 27 OCTOBER 10
FOSSTON               SEPTEMBER 11  SEPTEMBER 21 OCTOBER 1
HALLOCK               SEPTEMBER 10  SEPTEMBER 22 SEPTEMBER 30
ITASCA STATE PARK     SEPTEMBER 1   SEPTEMBER 15 SEPTEMBER 25
PARK RAPIDS AIRPORT   SEPTEMBER 7   SEPTEMBER 18 SEPTEMBER 29
RED LAKE FALLS        SEPTEMBER 13  SEPTEMBER 23 SEPTEMBER 30
RED LAKE              SEPTEMBER 13  SEPTEMBER 22 OCTOBER 3
ROSEAU                SEPTEMBER 2   SEPTEMBER 10 SEPTEMBER 24
WADENA 3S             SEPTEMBER 15  SEPTEMBER 23 OCTOBER 2
WARROAD               SEPTEMBER 8   SEPTEMBER 18 SEPTEMBER 29

NORTH DAKOTA
CITY                  FIRST FROST   FIRST FREEZE / HARD FREEZE
AMENIA                SEPTEMBER 12  SEPTEMBER 24 OCTOBER 2
CAVALIER 7NW          SEPTEMBER 11  SEPTEMBER 23 OCTOBER 2
COOPERSTOWN 5E        SEPTEMBER 9   SEPTEMBER 20 SEPTEMBER 29
DEVILS LAKE           SEPTEMBER 14  SEPTEMBER 23 OCTOBER 2
EDMORE 1NW            AUGUST 31     SEPTEMBER 10 SEPTEMBER 21
FARGO AIRPORT         SEPTEMBER 16  SEPTEMBER 26 OCTOBER 4
FORMAN 5SSE           SEPTEMBER 15  SEPTEMBER 23 OCTOBER 4
GRAFTON CITY          SEPTEMBER 9   SEPTEMBER 20 SEPTEMBER 29
GRAND FORKS ARPT      SEPTEMBER 11  SEPTEMBER 20 OCTOBER 4
HANSBORO 3W           SEPTEMBER 2   SEPTEMBER 11 SEPTEMBER 24
HILLSBORO             SEPTEMBER 18  SEPTEMBER 25 OCTOBER 6
LANGDON EXP FARM      AUGUST 30     SEPTEMBER 10 SEPTEMBER 21
LARIMORE              SEPTEMBER 10  SEPTEMBER 22 OCTOBER 4
LEEDS                 SEPTEMBER 6   SEPTEMBER 15 SEPTEMBER 27
LISBON                SEPTEMBER 8   SEPTEMBER 20 SEPTEMBER 27
MAYVILLE              SEPTEMBER 16  SEPTEMBER 26 OCTOBER 6
PARK RIVER            SEPTEMBER 15  SEPTEMBER 25 OCTOBER 3
PEMBINA               SEPTEMBER 7   SEPTEMBER 17 SEPTEMBER 29
PETERSBURG 2N         SEPTEMBER 6   SEPTEMBER 17 SEPTEMBER 26
UND/NWS GRAND FORKS   SEPTEMBER 16  SEPTEMBER 24 OCTOBER 4
WAHPETON              SEPTEMBER 19  SEPTEMBER 26 OCTOBER 10


The data above are provided by the National Climate Data Center in Asheville, NC. For more information, please contact the NOAA's National Weather Service Office in Grand Forks at 701.795.5198. Or contact Mark Ewens, Climate Services Focal Point at Mark.Ewens@noaa.gov


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