When to plant in Byers, CO

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

Safe to plant out

May 26

1 year in 10 has a later frost

Average last frost

May 15

about a 50% chance of a later one

Average first fall frost

Sep 29

1 year in 10 by Sep 13

Frost-free days

137

median, 1991–2020

Station used: Byers 5 Ene · 9.2 km away · station 1555 m, town 1586 m. How we match towns to stations

This season

Plan your garden.

Build my Byers plan

Planting dates for common crops

Crop	Start indoors	Plant out or sow	Harvest from
Tomato	Mar 31 – Apr 14	May 26 – Jun 9	Jul 20
Sweet pepper	Mar 17 – Mar 31	May 26 – Jun 9	Jul 25
Lettuce (leaf)	Mar 13 – Mar 20	Apr 17 – May 1	May 27
Peas	—	Apr 3 – May 1	May 28
Bush beans	—	May 19 – Jun 9	Jul 8
Carrot	—	Apr 24 – Jun 5	Jun 23
Beet	—	Apr 17 – May 29	Jun 6
Potato	—	Apr 24 – May 15	Jul 3
Kale	Mar 6 – Mar 20	Apr 17 – May 1	May 30
Broccoli	Mar 6 – Mar 20	Apr 17 – May 8	Jun 16
Cucumber	Apr 28 – May 5	May 26 – Jun 9	Jul 15
Summer squash and zucchini	Apr 28 – May 5	May 26 – Jun 9	Jul 10
Winter squash	Apr 28 – May 5	May 26 – Jun 9	Aug 14
Sweet corn	—	May 19 – Jun 9	Jul 18
Onion (from sets)	—	Apr 17 – May 8	Jul 16
Garlic	—	Sep 15 – Oct 13 (fall)	following summer
Spinach	—	Apr 3 – May 1	May 11
Basil	Apr 14 – Apr 28	May 26 – Jun 9	Jul 22

Plan all 65 crops for Byers

Byers'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
1931	May 22
1932	Apr 30
1933	May 13
1934	May 13
1935	May 20
1936	May 9
1937	Jun 6
1938	May 8
1939	May 13
1940	May 1
1941	Apr 25
1942	May 20
1943	Jun 5
1944	Apr 25
1945	May 16
1946	Jun 1
1947	Jun 12
1948	May 12
1949	May 1
1951	Jun 3
1952	May 10
1953	May 13
1954	Jun 3
1955	May 17
1956	May 15
1957	May 16
1958	Apr 30
1959	Apr 28
1960	May 19
1962	May 15
1963	May 21
1964	May 12
1965	May 10
1966	May 13
1967	May 15
1968	May 19
1969	Apr 28
1970	May 15
1971	May 23
1972	May 7
1973	May 14
1974	May 22
1975	Jun 11
1976	May 17
1977	Apr 24
1978	May 13
1979	May 11
1980	May 13
1981	May 12
1982	May 6
1983	May 18
1984	May 8
1985	Apr 27
1986	May 10
1987	Apr 23
1988	May 4
1989	May 6
1990	May 14
1991	May 13
1992	Apr 26
1993	Jun 7
1994	Apr 30
1995	May 14
1996	May 3
1997	May 12
1998	Apr 29
1999	May 12
2000	May 13
2001	May 21
2002	May 23
2003	May 11
2004	May 13
2005	May 13
2006	May 16
2007	Jun 8
2008	May 14
2009	May 14
2010	May 13
2011	May 12
2012	May 28
2017	May 21
2019	May 23

Each year's frost-free daysLong-term trend

See the data as a table

Year	Frost-free days
1931	142
1932	157
1933	155
1934	124
1935	129
1936	139
1937	110
1938	154
1939	149
1940	155
1941	135
1942	121
1943	92
1944	160
1945	119
1946	113
1947	131
1949	162
1951	115
1952	147
1953	143
1954	117
1955	142
1956	151
1957	128
1958	152
1959	152
1960	148
1962	116
1963	158
1964	137
1965	128
1966	140
1967	134
1968	119
1969	157
1970	119
1971	116
1972	145
1973	111
1974	112
1975	100
1976	133
1977	152
1978	128
1979	145
1980	149
1981	157
1982	152
1983	124
1984	139
1985	148
1986	139
1987	158
1988	168
1989	148
1990	146
1991	128
1992	152
1993	97
1994	144
1995	129
1996	146
1997	138
1998	159
1999	138
2001	136
2002	133
2003	125
2004	153
2005	144
2006	124
2007	121
2008	131
2009	139
2010	152
2011	153
2012	128
2019	136

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

See the data as a table

Year	Growing-season temperature
1931	18.7 °C
1932	18.1 °C
1933	18.0 °C
1934	18.2 °C
1935	16.3 °C
1936	18.5 °C
1937	18.1 °C
1938	17.3 °C
1939	18.5 °C
1940	18.2 °C
1941	16.9 °C
1942	16.9 °C
1943	18.0 °C
1944	17.0 °C
1945	15.5 °C
1946	17.6 °C
1947	17.0 °C
1948	18.4 °C
1949	17.5 °C
1951	16.2 °C
1952	18.1 °C
1953	17.4 °C
1954	19.0 °C
1955	17.9 °C
1956	17.9 °C
1957	16.0 °C
1958	17.7 °C
1959	17.2 °C
1960	17.8 °C
1961	17.1 °C
1962	17.6 °C
1963	18.6 °C
1964	17.2 °C
1965	16.3 °C
1966	17.5 °C
1967	15.6 °C
1968	16.1 °C
1969	17.7 °C
1970	16.6 °C
1971	16.5 °C
1972	16.6 °C
1973	15.8 °C
1974	16.7 °C
1975	15.4 °C
1976	16.7 °C
1977	18.1 °C
1978	17.4 °C
1979	16.8 °C
1980	17.4 °C
1981	17.4 °C
1982	16.6 °C
1983	16.0 °C
1984	16.8 °C
1985	17.2 °C
1986	17.4 °C
1987	17.5 °C
1988	18.1 °C
1989	17.7 °C
1990	17.8 °C
1991	17.3 °C
1992	17.5 °C
1993	16.4 °C
1994	18.9 °C
1995	16.1 °C
1996	17.7 °C
1997	17.4 °C
1998	18.2 °C
1999	16.3 °C
2001	17.9 °C
2002	18.4 °C
2003	18.1 °C
2004	16.9 °C
2005	17.7 °C
2006	17.4 °C
2007	18.2 °C
2008	16.6 °C
2009	16.6 °C
2010	17.4 °C
2011	17.6 °C
2012	18.9 °C
2014	16.7 °C
2018	18.5 °C
2019	17.4 °C

What this means for you: Since 1931, Byers's last spring frost has stayed at about the same time of year. Year-to-year swings are large, so keep using the safe date rather than the trend.

Source: daily records from Byers 5 Ene (NOAA GHCN-Daily). Years with too many missing days are left out.

Nearby towns

Strasburg Bennett Ponderosa Park Elizabeth Parker Keenesburg