When to plant in Coalhurst, AB

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

Safe to plant out

May 21

1 year in 10 has a later frost

Average last frost

May 13

about a 50% chance of a later one

Average first fall frost

Sep 24

1 year in 10 by Sep 13

Frost-free days

133

median, 1991–2020

Station used: Lethbridge Cda · 13.2 km away · station 910 m, town 933 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	Mar 26 – Apr 9	May 21 – Jun 4	Jul 15
Sweet pepper	Mar 12 – Mar 26	May 21 – Jun 4	Jul 20
Lettuce (leaf)	Mar 13 – Mar 20	Apr 17 – May 1	May 27
Peas	—	Apr 17 – May 15	Jun 11
Bush beans	—	May 16 – Jun 6	Jul 5
Carrot	—	Apr 29 – Jun 10	Jun 28
Beet	—	Apr 29 – Jun 10	Jun 18
Potato	—	Apr 29 – May 20	Jul 8
Kale	Mar 13 – Mar 27	Apr 24 – May 8	Jun 6
Broccoli	Mar 6 – Mar 20	Apr 17 – May 8	Jun 16
Cucumber	Apr 23 – Apr 30	May 21 – Jun 4	Jul 10
Summer squash and zucchini	Apr 23 – Apr 30	May 21 – Jun 4	Jul 5
Winter squash	Apr 23 – Apr 30	May 21 – Jun 4	Aug 9
Sweet corn	—	May 16 – Jun 6	Jul 15
Onion (from sets)	—	Apr 17 – May 8	Jul 16
Garlic	—	Sep 10 – Oct 8 (fall)	following summer
Spinach	—	Apr 17 – May 15	May 25
Basil	Apr 9 – Apr 23	May 21 – Jun 4	Jul 17

Plan all 65 crops for Coalhurst

Coalhurst'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
1908	May 2
1909	May 29
1910	Jun 4
1911	May 28
1912	Jun 6
1913	May 12
1914	May 12
1915	May 16
1916	May 23
1917	Jun 4
1918	Jun 6
1919	Jun 1
1920	Jun 3
1921	May 31
1922	May 23
1923	May 29
1924	May 26
1925	May 17
1926	Jun 9
1927	May 18
1928	May 14
1929	May 19
1930	May 23
1931	May 21
1932	May 28
1933	May 20
1934	May 12
1935	May 28
1936	Apr 29
1937	May 21
1938	May 20
1939	May 11
1940	Apr 26
1941	May 22
1942	May 18
1943	Jun 8
1944	May 23
1945	May 16
1946	May 21
1947	May 28
1948	May 12
1949	Jun 18
1950	May 8
1951	Jun 27
1952	May 9
1953	May 21
1954	May 14
1955	May 25
1956	May 13
1957	May 10
1958	May 3
1959	May 28
1960	May 23
1961	May 18
1962	May 8
1963	May 21
1964	May 26
1965	May 21
1966	May 12
1967	May 13
1968	May 20
1969	Jun 12
1970	May 18
1971	May 23
1972	May 11
1973	May 13
1974	May 19
1975	May 25
1976	Jun 4
1977	May 28
1978	May 25
1979	Jul 3
1980	May 15
1981	May 11
1982	May 30
1983	May 16
1984	Jun 2
1985	May 12
1986	May 15
1987	May 22
1988	May 3
1995	May 22
1996	May 11
1997	May 19
1998	May 1
1999	May 13
2000	May 14
2001	May 21
2002	May 23
2003	May 18
2005	May 11
2007	Apr 22
2008	May 10
2009	May 20
2010	May 12
2011	May 10
2012	May 11
2013	May 2
2014	May 13
2015	May 19
2019	May 20
2020	May 13
2021	May 21
2022	Jun 1
2023	Apr 28
2024	May 20
2025	May 22
2026	May 18

Each year's frost-free daysLong-term trend

See the data as a table

Year	Frost-free days
1908	143
1909	90
1910	79
1911	90
1912	91
1913	122
1914	125
1915	117
1916	113
1917	88
1918	100
1919	116
1920	107
1921	100
1922	131
1923	104
1924	116
1925	125
1926	93
1927	112
1928	91
1929	109
1930	122
1931	115
1932	97
1933	126
1934	124
1935	120
1936	137
1937	125
1938	146
1939	136
1940	170
1941	108
1942	122
1943	85
1944	118
1945	123
1946	124
1947	111
1948	116
1949	84
1950	125
1951	79
1952	147
1953	127
1954	137
1955	107
1956	111
1957	130
1958	143
1959	103
1960	107
1961	112
1962	117
1963	137
1964	106
1965	107
1966	140
1967	145
1968	123
1969	95
1970	115
1971	116
1972	118
1973	123
1974	130
1975	108
1976	95
1977	121
1978	132
1979	87
1980	101
1981	135
1982	107
1983	116
1984	111
1985	117
1986	114
1987	135
1988	127
1995	120
1996	134
1997	122
1998	142
1999	136
2000	128
2001	133
2002	122
2003	120
2005	135
2007	143
2008	114
2009	130
2010	155
2011	141
2012	123
2015	138
2019	130
2020	152
2021	90
2022	111
2023	160
2024	135
2025	136

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

See the data as a table

Year	Growing-season temperature
1908	13.5 °C
1909	12.0 °C
1910	13.8 °C
1911	11.6 °C
1912	12.4 °C
1913	13.1 °C
1914	13.2 °C
1915	12.6 °C
1916	12.2 °C
1917	12.4 °C
1918	13.2 °C
1919	13.6 °C
1920	11.7 °C
1921	12.6 °C
1922	13.3 °C
1923	13.0 °C
1924	12.5 °C
1925	13.1 °C
1926	12.3 °C
1927	11.4 °C
1928	12.3 °C
1929	12.0 °C
1930	13.6 °C
1931	13.7 °C
1932	13.7 °C
1933	12.9 °C
1934	13.5 °C
1935	12.1 °C
1936	14.5 °C
1937	13.5 °C
1938	13.9 °C
1939	13.4 °C
1940	14.1 °C
1941	13.3 °C
1942	12.7 °C
1943	13.0 °C
1944	13.6 °C
1945	11.9 °C
1946	13.5 °C
1947	13.1 °C
1948	12.6 °C
1949	13.9 °C
1950	12.4 °C
1951	11.5 °C
1952	13.3 °C
1953	12.2 °C
1954	11.3 °C
1955	12.2 °C
1956	12.8 °C
1957	13.3 °C
1958	14.0 °C
1959	12.3 °C
1960	13.5 °C
1961	13.6 °C
1962	13.4 °C
1963	13.9 °C
1964	12.3 °C
1965	12.0 °C
1966	12.8 °C
1967	12.9 °C
1968	12.1 °C
1969	13.9 °C
1970	13.9 °C
1971	13.7 °C
1972	12.6 °C
1973	13.5 °C
1974	13.1 °C
1975	11.9 °C
1976	14.0 °C
1977	13.4 °C
1978	12.9 °C
1979	13.2 °C
1980	13.8 °C
1981	13.8 °C
1982	12.4 °C
1983	13.3 °C
1984	13.4 °C
1985	13.1 °C
1986	13.2 °C
1987	14.6 °C
1988	15.0 °C
1995	12.3 °C
1996	13.6 °C
1997	14.2 °C
1998	15.6 °C
1999	13.1 °C
2000	14.2 °C
2001	15.2 °C
2002	12.6 °C
2005	13.4 °C
2007	14.6 °C
2008	13.3 °C
2009	13.7 °C
2010	12.7 °C
2011	13.7 °C
2012	14.7 °C
2013	14.4 °C
2015	14.6 °C
2019	14.0 °C
2020	14.0 °C
2021	15.1 °C
2022	14.7 °C
2023	15.7 °C
2024	14.6 °C
2025	15.3 °C
2026	14.4 °C

What this means for you: Since 1908, Coalhurst's last spring frost has come about 1 day earlier per decade, on average. The frost-free season has grown by about 2 days per decade. Year-to-year swings are large, so keep using the safe date rather than the trend.

Source: daily records from Lethbridge Cda (NOAA GHCN-Daily, from Environment and Climate Change Canada). Years with too many missing days are left out.

Nearby towns

Lethbridge Picture Butte Coaldale Fort Macleod Magrath Raymond