Dunn County, North Dakota · Frost dates
Dunn County frost dates.
First-frost, last-frost, and growing-season length for Dunn County, North Dakota. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4a
32°F — light freeze
Last spring frost
- 10%
- 06-01
- 20%
- 05-28
- 50%
- 05-20
- 80%
- 05-11
- 90%
- 05-07
First fall frost
- 10%
- 09-07
- 20%
- 09-13
- 50%
- 09-21
- 80%
- 09-30
- 90%
- 10-03
28°F — killing freeze
Last spring freeze
- 10%
- 05-24
- 20%
- 05-18
- 50%
- 05-09
- 80%
- 05-01
- 90%
- 04-27
First fall freeze
- 10%
- 09-16
- 20%
- 09-21
- 50%
- 09-30
- 80%
- 10-08
- 90%
- 10-13
Growing season length (days, 28°F threshold)
- Short year
- 115
- Median
- 144
- Long year
- 169
Source NOAA station
DUNN CTR 1E, ND US
1.3 mi · 30 yrs of record (1991–2020) · 2187 ft elev.
Data from DUNN CTR 1E, ND US, 1.3 miles away with 30-year NOAA record (1991-2020).
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