Denver County, Colorado · Frost dates
Denver County frost dates.
First-frost, last-frost, and growing-season length for Denver County, Colorado. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5a
32°F — light freeze
Last spring frost
- 10%
- 05-16
- 20%
- 05-11
- 50%
- 05-04
- 80%
- 04-24
- 90%
- 04-20
First fall frost
- 10%
- 09-25
- 20%
- 09-30
- 50%
- 10-08
- 80%
- 10-17
- 90%
- 10-20
28°F — killing freeze
Last spring freeze
- 10%
- 05-07
- 20%
- 05-02
- 50%
- 04-22
- 80%
- 04-12
- 90%
- 04-06
First fall freeze
- 10%
- 10-03
- 20%
- 10-08
- 50%
- 10-18
- 80%
- 10-27
- 90%
- 10-31
Growing season length (days, 28°F threshold)
- Short year
- 149
- Median
- 179
- Long year
- 208
Source NOAA station
DENVER-STAPLETON, CO US
0.6 mi · 30 yrs of record (1991–2020) · 5286 ft elev.
Data from DENVER-STAPLETON, CO US, 0.6 miles away with 30-year NOAA record (1991-2020).
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