When to plant in Bonners Ferry, ID

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

Safe to plant out

May 19

1 year in 10 has a later frost

Average last frost

May 4

about a 50% chance of a later one

Average first fall frost

Oct 3

1 year in 10 by Sep 21

Frost-free days

154

median, 1991–2020

Station used: Bonners Ferry · 0.5 km away · station 610 m, town 578 m. How we match towns to stations

This season

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Planting dates for common crops

Crop	Start indoors	Plant out or sow	Harvest from
Tomato	Mar 24 – Apr 7	May 19 – Jun 2	Jul 13
Sweet pepper	Mar 10 – Mar 24	May 19 – Jun 2	Jul 18
Lettuce (leaf)	Mar 2 – Mar 9	Apr 6 – Apr 20	May 16
Peas	—	Apr 1 – Apr 29	May 26
Bush beans	—	May 12 – Jun 2	Jul 1
Carrot	—	Apr 14 – May 26	Jun 13
Beet	—	Apr 14 – May 26	Jun 3
Potato	—	Apr 14 – May 5	Jun 23
Kale	Feb 25 – Mar 11	Apr 8 – Apr 22	May 21
Broccoli	Feb 23 – Mar 9	Apr 6 – Apr 27	Jun 5
Cucumber	Apr 21 – Apr 28	May 19 – Jun 2	Jul 8
Summer squash and zucchini	Apr 21 – Apr 28	May 19 – Jun 2	Jul 3
Winter squash	Apr 21 – Apr 28	May 19 – Jun 2	Aug 7
Sweet corn	—	May 12 – Jun 2	Jul 11
Onion (from sets)	—	Apr 6 – Apr 27	Jul 5
Garlic	—	Sep 19 – Oct 17 (fall)	following summer
Spinach	—	Apr 1 – Apr 29	May 9
Basil	Apr 7 – Apr 21	May 19 – Jun 2	Jul 15

Plan all 65 crops for Bonners Ferry

Bonners Ferry'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 20
1909	May 14
1910	Jun 4
1911	May 26
1912	Jun 3
1913	May 16
1914	May 29
1915	May 30
1937	May 6
1938	May 6
1939	Apr 18
1940	Apr 30
1941	May 19
1943	May 13
1944	May 26
1946	May 10
1947	Apr 25
1948	May 5
1949	May 5
1950	May 31
1951	May 31
1952	May 7
1954	May 14
1955	May 23
1956	May 13
1958	Apr 30
1959	May 13
1960	May 23
1961	Apr 26
1962	May 5
1963	May 11
1964	May 26
1965	May 18
1966	May 23
1967	May 26
1968	May 11
1969	May 5
1970	May 12
1971	Apr 30
1972	May 3
1973	May 21
1974	May 10
1975	May 25
1976	May 19
1977	May 30
1978	May 23
1979	May 17
1980	Jun 4
1981	May 5
1982	May 11
1983	May 14
1984	May 22
1985	May 13
1986	May 23
1987	May 22
1988	May 2
1989	May 20
1991	May 4
1992	May 12
1993	Jun 3
1994	May 2
1995	May 4
1996	May 9
1997	Apr 22
1998	May 16
1999	Jun 10
2000	May 13
2001	May 20
2004	Apr 30
2005	May 2
2008	May 8
2011	May 1
2012	May 12
2013	May 1
2014	Apr 19
2015	Apr 23
2016	Mar 31
2017	Apr 17
2018	Apr 22
2019	Apr 30
2020	May 4
2021	May 19
2022	Apr 30
2023	Apr 24
2024	May 1
2025	Apr 24
2026	Apr 25

Each year's frost-free daysLong-term trend

See the data as a table

Year	Frost-free days
1908	126
1909	105
1910	80
1911	103
1913	107
1914	105
1915	106
1937	164
1938	160
1939	163
1940	158
1941	131
1943	117
1944	114
1947	141
1948	141
1949	129
1950	119
1951	117
1954	137
1956	114
1958	149
1959	118
1960	109
1961	138
1962	120
1963	149
1964	107
1965	110
1966	132
1967	119
1968	143
1969	132
1970	122
1971	136
1972	130
1973	116
1974	125
1975	143
1976	111
1977	125
1978	116
1979	134
1980	85
1981	140
1982	125
1983	127
1984	114
1985	131
1986	111
1987	117
1988	167
1991	120
1992	117
1994	154
1995	139
1996	136
1997	168
1998	155
1999	107
2000	131
2001	136
2004	176
2005	144
2011	167
2012	144
2013	155
2014	166
2015	182
2016	193
2017	169
2018	165
2019	153
2020	164
2021	141
2022	189
2023	183
2025	173

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

See the data as a table

Year	Growing-season temperature
1908	14.1 °C
1909	13.7 °C
1910	14.1 °C
1911	12.8 °C
1913	12.9 °C
1914	13.6 °C
1915	14.4 °C
1937	14.8 °C
1938	16.0 °C
1939	14.9 °C
1940	16.6 °C
1941	15.9 °C
1942	15.3 °C
1943	14.6 °C
1944	15.5 °C
1945	13.8 °C
1947	15.1 °C
1948	14.8 °C
1949	15.5 °C
1950	14.7 °C
1951	14.7 °C
1952	15.6 °C
1954	13.6 °C
1956	15.2 °C
1958	16.2 °C
1959	13.9 °C
1960	14.6 °C
1961	15.3 °C
1962	14.3 °C
1963	15.0 °C
1964	13.5 °C
1965	14.3 °C
1966	14.5 °C
1967	15.5 °C
1968	14.1 °C
1969	14.9 °C
1970	14.6 °C
1971	14.5 °C
1972	14.1 °C
1973	15.2 °C
1974	15.0 °C
1975	13.9 °C
1976	14.7 °C
1977	15.2 °C
1978	14.6 °C
1979	15.8 °C
1980	14.6 °C
1981	14.9 °C
1982	14.5 °C
1983	14.7 °C
1984	14.6 °C
1985	15.3 °C
1986	15.1 °C
1987	16.2 °C
1988	15.9 °C
1989	15.5 °C
1990	15.3 °C
1991	14.2 °C
1992	16.0 °C
1993	14.7 °C
1994	16.2 °C
1995	15.1 °C
1996	14.8 °C
1997	15.4 °C
1998	16.6 °C
1999	14.3 °C
2000	14.7 °C
2001	15.6 °C
2002	14.7 °C
2005	15.4 °C
2011	14.8 °C
2012	15.5 °C
2013	16.2 °C
2014	16.0 °C
2015	17.0 °C
2016	16.5 °C
2017	16.7 °C
2018	15.9 °C
2019	15.8 °C
2020	15.5 °C
2021	16.8 °C
2022	15.6 °C
2023	17.2 °C
2025	17.9 °C
2026	17.6 °C

What this means for you: Since 1908, Bonners Ferry'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 Bonners Ferry (NOAA GHCN-Daily). Years with too many missing days are left out.

Nearby towns

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