Riley County, Kansas · Frost dates
Riley County frost dates.
First-frost, last-frost, and growing-season length for Riley County, Kansas. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 05-05
- 20%
- 04-30
- 50%
- 04-22
- 80%
- 04-13
- 90%
- 04-08
First fall frost
- 10%
- 10-04
- 20%
- 10-10
- 50%
- 10-20
- 80%
- 10-27
- 90%
- 11-01
28°F — killing freeze
Last spring freeze
- 10%
- 04-26
- 20%
- 04-21
- 50%
- 04-10
- 80%
- 04-02
- 90%
- 03-28
First fall freeze
- 10%
- 10-15
- 20%
- 10-19
- 50%
- 10-28
- 80%
- 11-05
- 90%
- 11-10
Growing season length (days, 28°F threshold)
- Short year
- 172
- Median
- 201
- Long year
- 227
Source NOAA station
TUTTLE CREEK LAKE, KS US
7.5 mi · 30 yrs of record (1991–2020) · 1058 ft elev.
Data from TUTTLE CREEK LAKE, KS US, 7.5 miles away with 30-year NOAA record (1991-2020).
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