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N.D. (AP) — The National Weather Service’s Bismarck Office says North Dakota’s first freeze is typically just a couple of weeks away for most residents of the state.

Climatological data for 1980 through 2010 shows that most of North Dakota typically experiences its first sub-32-degree temperature between Sept. 21 and Sept. 30.

A small portion of the far western part of the state will typically freeze earlier — between Sept. 11 and Sept. 20.

The data comes from the Vegetation Impact Program, a monitoring, assessment and networking program hosted by the Midwestern Regional Climate Center.