When to plant in Hayden, CO

Planting dates worked out from Hayden's own frost records, not a generic zone chart.

Safe to plant out

Jun 19

1 year in 10 has a later frost

Average last frost

Jun 2

about a 50% chance of a later one

Average first fall frost

Sep 18

1 year in 10 by Sep 6

Frost-free days

107

median, 1991–2020

Station used: Hayden · 0.4 km away · station 1971 m, town 1935 m. How we match towns to stations

This season

Plan your garden.

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Planting dates for common crops

Crop	Start indoors	Plant out or sow	Harvest from
Tomato	Apr 24 – May 8	Jun 19 – Jul 3	Aug 13
Sweet pepper	Apr 10 – Apr 24	Jun 19 – Jul 3	Aug 18
Lettuce (leaf)	Mar 31 – Apr 7	May 5 – May 19	Jun 14
Peas	—	Apr 21 – May 19	Jun 15
Bush beans	—	Jun 12 – Jul 3	Aug 1
Carrot	—	May 12 – Jun 23	Jul 11
Beet	—	May 5 – Jun 16	Jun 24
Potato	—	May 12 – Jun 2	Jul 21
Kale	Mar 24 – Apr 7	May 5 – May 19	Jun 17
Broccoli	Mar 24 – Apr 7	May 5 – May 26	Jul 4
Cucumber	May 22 – May 29	Jun 19 – Jul 3	Aug 8
Summer squash and zucchini	May 22 – May 29	Jun 19 – Jul 3	Aug 3
Winter squash Season likely too short	May 22 – May 29	Jun 19 – Jul 3	Sep 7
Sweet corn	—	Jun 12 – Jul 3	Aug 11
Onion (from sets)	—	May 5 – May 26	Aug 3
Garlic	—	Sep 4 – Oct 2 (fall)	following summer
Spinach	—	Apr 21 – May 19	May 29
Basil	May 8 – May 22	Jun 19 – Jul 3	Aug 15

Plan all 65 crops for Hayden

Hayden's weather over time

How the growing season has shifted here, year by year, from the station's own records.

Each year's last spring frostLong-term trend

See the data as a table

Year	Last spring frost
1909	May 21
1913	May 22
1914	Jun 27
1915	Jun 21
1916	Jun 23
1921	Jul 3
1922	Jun 3
1923	Jun 30
1925	Jun 13
1926	Jun 22
1927	Jun 5
1929	Jun 24
1933	May 29
1934	Jun 9
1935	Jun 25
1936	Jun 3
1937	Jun 13
1938	Jun 3
1939	Jun 19
1940	Jun 10
1941	Jun 11
1943	Jun 16
1944	Jun 18
1945	Jun 28
1946	Jun 24
1947	Jul 1
1948	Jun 1
1949	Jun 5
1950	Jun 9
1951	Jun 6
1952	Jun 16
1953	Jun 25
1954	Jun 12
1955	Jul 8
1956	Jun 7
1957	Jun 22
1958	May 16
1959	Jun 2
1960	Jun 23
1961	May 19
1962	Jun 16
1963	May 28
1964	May 29
1965	May 28
1966	Jun 13
1967	Jun 7
1968	Jul 1
1969	Jun 1
1970	Jun 2
1971	May 24
1973	Jun 20
1974	Jun 8
1975	Jun 26
1976	Jun 24
1977	May 22
1978	Jun 1
1980	Jun 1
1981	Jun 16
1982	Jun 9
1983	May 31
1984	May 28
1985	May 31
1986	May 26
1987	Jun 3
1988	May 31
1989	Jun 22
1990	Jun 2
1991	May 13
1992	Jun 1
1993	Jul 4
1994	Jun 9
1995	Jun 22
1996	May 5
1997	May 26
1998	May 22
1999	Jun 5
2000	May 19
2001	Jun 13
2002	Jun 11
2003	May 21
2004	May 30
2005	Jun 8
2006	May 31
2007	Jun 8
2008	Jun 13
2009	May 15
2010	May 31
2011	Jun 10
2013	Jun 1
2014	Jun 19
2015	May 17
2016	May 23
2017	Jun 13
2018	Jun 2
2019	Jun 21
2020	May 26
2021	Jun 11
2022	Jun 1
2023	Apr 29
2024	May 24
2025	May 16
2026	May 22

Each year's frost-free daysLong-term trend

See the data as a table

Year	Frost-free days
1909	113
1913	117
1914	74
1915	62
1916	78
1921	62
1922	97
1923	63
1925	88
1926	70
1927	72
1929	76
1933	84
1934	84
1935	70
1936	103
1937	90
1938	106
1939	101
1940	99
1941	84
1943	75
1944	72
1945	72
1946	76
1947	72
1948	96
1949	90
1950	51
1951	94
1952	77
1953	69
1954	66
1955	63
1956	84
1957	78
1958	121
1959	90
1960	54
1961	105
1962	72
1963	122
1964	82
1965	94
1966	109
1967	97
1968	60
1969	115
1970	104
1971	89
1974	95
1975	59
1976	95
1977	118
1978	74
1980	112
1981	101
1982	111
1983	111
1984	119
1985	104
1986	113
1987	106
1988	110
1989	80
1990	124
1991	125
1992	86
1993	71
1994	82
1995	90
1996	134
1997	124
1998	134
1999	94
2000	126
2001	87
2002	102
2003	115
2004	107
2005	83
2006	108
2007	108
2008	101
2009	129
2010	98
2011	107
2013	116
2014	84
2015	147
2016	115
2017	95
2018	110
2019	91
2020	104
2021	101
2022	131
2023	146
2024	146
2025	142

Each year's average temperature, April to SeptemberLong-term trend

See the data as a table

Year	Growing-season temperature
1909	13.0 °C
1913	13.8 °C
1914	13.6 °C
1915	12.9 °C
1916	12.8 °C
1920	12.4 °C
1921	13.6 °C
1922	13.7 °C
1923	12.9 °C
1925	14.0 °C
1926	13.9 °C
1927	13.3 °C
1929	12.4 °C
1933	14.3 °C
1934	14.9 °C
1935	13.4 °C
1936	14.1 °C
1937	13.6 °C
1938	14.1 °C
1939	14.7 °C
1940	15.3 °C
1941	14.5 °C
1942	14.6 °C
1943	14.4 °C
1944	13.3 °C
1945	13.2 °C
1946	14.2 °C
1947	13.7 °C
1948	13.7 °C
1949	13.4 °C
1950	12.6 °C
1951	13.1 °C
1952	13.9 °C
1953	12.9 °C
1954	14.0 °C
1955	12.9 °C
1956	13.5 °C
1957	13.0 °C
1958	13.9 °C
1959	13.4 °C
1960	13.8 °C
1961	13.2 °C
1962	13.4 °C
1963	14.1 °C
1964	13.1 °C
1965	12.1 °C
1966	14.0 °C
1967	13.5 °C
1968	12.3 °C
1969	14.7 °C
1970	13.5 °C
1971	13.3 °C
1972	13.2 °C
1974	13.8 °C
1975	12.8 °C
1976	14.4 °C
1977	15.7 °C
1978	14.3 °C
1980	14.3 °C
1981	15.4 °C
1982	14.2 °C
1983	14.0 °C
1984	14.0 °C
1985	14.2 °C
1986	13.9 °C
1987	14.4 °C
1988	15.0 °C
1989	14.8 °C
1990	15.0 °C
1991	14.2 °C
1992	14.5 °C
1993	13.3 °C
1994	15.4 °C
1995	13.4 °C
1996	14.6 °C
1997	14.2 °C
1998	14.7 °C
1999	14.0 °C
2000	15.7 °C
2001	15.7 °C
2002	15.7 °C
2003	15.3 °C
2004	14.7 °C
2005	14.6 °C
2006	15.5 °C
2007	16.1 °C
2008	13.9 °C
2009	14.2 °C
2010	14.2 °C
2011	14.0 °C
2013	14.8 °C
2014	14.3 °C
2015	14.7 °C
2016	14.8 °C
2017	14.7 °C
2018	15.6 °C
2019	14.2 °C
2020	15.0 °C
2021	16.0 °C
2022	15.7 °C
2023	15.0 °C
2024	15.6 °C
2025	15.9 °C
2026	16.6 °C

What this means for you: Since 1909, Hayden's last spring frost has come about 2 days earlier per decade, on average. The frost-free season has grown by about 4 days per decade. Year-to-year swings are large, so keep using the safe date rather than the trend.

Source: daily records from Hayden (NOAA GHCN-Daily). Years with too many missing days are left out.

Nearby towns

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