Jefferson County, Kansas · Frost dates
Jefferson County frost dates.
First-frost, last-frost, and growing-season length for Jefferson County, Kansas. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 04-29
- 20%
- 04-24
- 50%
- 04-16
- 80%
- 04-07
- 90%
- 04-02
First fall frost
- 10%
- 10-05
- 20%
- 10-12
- 50%
- 10-22
- 80%
- 10-30
- 90%
- 11-04
28°F — killing freeze
Last spring freeze
- 10%
- 04-21
- 20%
- 04-16
- 50%
- 04-07
- 80%
- 03-29
- 90%
- 03-22
First fall freeze
- 10%
- 10-17
- 20%
- 10-23
- 50%
- 11-01
- 80%
- 11-10
- 90%
- 11-15
Growing season length (days, 28°F threshold)
- Short year
- 179
- Median
- 208
- Long year
- 238
Source NOAA station
OSKALOOSA 4 NE, KS US
5.5 mi · 30 yrs of record (1991–2020) · 1109 ft elev.
Data from OSKALOOSA 4 NE, KS US, 5.5 miles away with 30-year NOAA record (1991-2020).
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