Billings County, North Dakota · Frost dates
Billings County frost dates.
First-frost, last-frost, and growing-season length for Billings County, North Dakota. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4a
32°F — light freeze
Last spring frost
- 10%
- 05-21
- 20%
- 05-17
- 50%
- 05-09
- 80%
- 05-03
- 90%
- 04-30
First fall frost
- 10%
- 09-15
- 20%
- 09-21
- 50%
- 09-30
- 80%
- 10-09
- 90%
- 10-13
28°F — killing freeze
Last spring freeze
- 10%
- 05-11
- 20%
- 05-06
- 50%
- 04-30
- 80%
- 04-20
- 90%
- 04-17
First fall freeze
- 10%
- 09-24
- 20%
- 09-29
- 50%
- 10-09
- 80%
- 10-19
- 90%
- 10-23
Growing season length (days, 28°F threshold)
- Short year
- 136
- Median
- 162
- Long year
- 189
Source NOAA station
MEDORA 7 E, ND US
7.8 mi · 30 yrs of record (1991–2020) · 2771 ft elev.
Data from MEDORA 7 E, ND US, 7.8 miles away with 30-year NOAA record (1991-2020).
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