When to plant in Salmon, ID
Planting dates worked out from Salmon's own frost records, not a generic zone chart.
Safe to plant out
Jun 5
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 23
1 year in 10 by Sep 10
Frost-free days
130
median, 1991–2020
Station used: Salmon-Ksra · 0.9 km away · station 1205 m, town 1202 m. How we match towns to stations
This season
Plan your garden.
Planting dates for common crops
| Crop | Start indoors | Plant out or sow | Harvest from |
|---|---|---|---|
| Tomato | Apr 10 – Apr 24 | Jun 5 – Jun 19 | Jul 30 |
| Sweet pepper | Mar 27 – Apr 10 | Jun 5 – Jun 19 | Aug 4 |
| Lettuce (leaf) | Mar 13 – Mar 20 | Apr 17 – May 1 | May 27 |
| Peas | — | Apr 3 – May 1 | May 28 |
| Bush beans | — | May 29 – Jun 19 | Jul 18 |
| Carrot | — | Apr 24 – Jun 5 | Jun 23 |
| Beet | — | Apr 19 – May 31 | Jun 8 |
| 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 | May 8 – May 15 | Jun 5 – Jun 19 | Jul 25 |
| Summer squash and zucchini | May 8 – May 15 | Jun 5 – Jun 19 | Jul 20 |
| Winter squash | May 8 – May 15 | Jun 5 – Jun 19 | Aug 24 |
| Sweet corn | — | May 29 – Jun 19 | Jul 28 |
| Onion (from sets) | — | Apr 17 – May 8 | Jul 16 |
| Garlic | — | Sep 9 – Oct 7 (fall) | following summer |
| Spinach | — | Apr 3 – May 1 | May 11 |
| Basil | Apr 24 – May 8 | Jun 5 – Jun 19 | Aug 1 |
Salmon'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 |
|---|---|
| 1968 | May 17 |
| 1969 | May 1 |
| 1970 | May 31 |
| 1971 | May 23 |
| 1972 | May 11 |
| 1973 | Jun 19 |
| 1974 | Jun 8 |
| 1975 | Jun 28 |
| 1976 | May 26 |
| 1977 | May 30 |
| 1978 | May 26 |
| 1979 | Jun 9 |
| 1980 | May 12 |
| 1981 | May 9 |
| 1982 | May 20 |
| 1983 | May 14 |
| 1984 | Jun 1 |
| 1985 | May 13 |
| 1986 | May 23 |
| 1987 | Jun 2 |
| 1988 | May 19 |
| 1989 | May 26 |
| 1990 | Jun 1 |
| 1991 | Jun 15 |
| 1992 | May 12 |
| 1993 | May 9 |
| 1994 | Apr 30 |
| 1995 | Jun 7 |
| 1996 | May 9 |
| 1997 | May 8 |
| 1998 | Apr 26 |
| 1999 | Jun 9 |
| 2000 | Jun 1 |
| 2002 | May 12 |
| 2003 | May 20 |
| 2006 | May 10 |
| 2007 | May 6 |
| 2008 | May 13 |
| 2009 | May 21 |
| 2010 | May 23 |
| 2011 | May 6 |
| 2012 | May 19 |
| 2013 | May 3 |
| 2014 | May 14 |
| 2015 | May 2 |
| 2016 | May 11 |
| 2018 | May 2 |
| 2020 | May 24 |
| 2021 | Jun 11 |
| 2023 | May 11 |
| 2024 | May 24 |
| 2025 | May 20 |
| 2026 | May 19 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1968 | 129 |
| 1969 | 127 |
| 1970 | 104 |
| 1971 | 114 |
| 1972 | 131 |
| 1973 | 98 |
| 1974 | 96 |
| 1975 | 81 |
| 1976 | 105 |
| 1977 | 115 |
| 1978 | 113 |
| 1979 | 115 |
| 1980 | 132 |
| 1981 | 134 |
| 1982 | 118 |
| 1983 | 118 |
| 1984 | 114 |
| 1985 | 128 |
| 1986 | 121 |
| 1987 | 106 |
| 1988 | 115 |
| 1989 | 108 |
| 1990 | 127 |
| 1991 | 91 |
| 1992 | 104 |
| 1993 | 126 |
| 1994 | 156 |
| 1995 | 105 |
| 1996 | 119 |
| 1997 | 150 |
| 1998 | 159 |
| 1999 | 109 |
| 2002 | 130 |
| 2003 | 120 |
| 2006 | 130 |
| 2007 | 141 |
| 2008 | 147 |
| 2009 | 133 |
| 2010 | 141 |
| 2011 | 155 |
| 2012 | 115 |
| 2013 | 146 |
| 2014 | 120 |
| 2015 | 162 |
| 2016 | 125 |
| 2018 | 146 |
| 2020 | 106 |
| 2021 | 97 |
| 2023 | 139 |
| 2024 | 128 |
| 2025 | 138 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1968 | 14.7 °C |
| 1969 | 16.0 °C |
| 1970 | 14.6 °C |
| 1971 | 14.7 °C |
| 1972 | 15.0 °C |
| 1973 | 15.8 °C |
| 1974 | 15.8 °C |
| 1975 | 14.3 °C |
| 1976 | 15.3 °C |
| 1977 | 15.6 °C |
| 1978 | 14.9 °C |
| 1979 | 15.9 °C |
| 1980 | 15.6 °C |
| 1981 | 16.1 °C |
| 1982 | 14.9 °C |
| 1983 | 15.1 °C |
| 1984 | 14.8 °C |
| 1985 | 16.0 °C |
| 1986 | 15.7 °C |
| 1987 | 16.3 °C |
| 1988 | 16.8 °C |
| 1989 | 15.9 °C |
| 1990 | 16.1 °C |
| 1991 | 15.6 °C |
| 1992 | 16.3 °C |
| 1993 | 14.4 °C |
| 1994 | 16.6 °C |
| 1995 | 15.1 °C |
| 1996 | 15.9 °C |
| 1997 | 16.1 °C |
| 1998 | 15.9 °C |
| 1999 | 15.3 °C |
| 2000 | 16.3 °C |
| 2002 | 15.0 °C |
| 2003 | 16.1 °C |
| 2004 | 14.5 °C |
| 2006 | 15.9 °C |
| 2007 | 15.8 °C |
| 2008 | 14.1 °C |
| 2009 | 14.9 °C |
| 2010 | 13.5 °C |
| 2011 | 14.1 °C |
| 2012 | 15.1 °C |
| 2013 | 15.4 °C |
| 2014 | 14.7 °C |
| 2015 | 15.1 °C |
| 2016 | 15.2 °C |
| 2017 | 14.8 °C |
| 2018 | 15.2 °C |
| 2019 | 15.3 °C |
| 2020 | 14.9 °C |
| 2021 | 15.4 °C |
| 2022 | 14.2 °C |
| 2023 | 15.6 °C |
| 2024 | 15.9 °C |
| 2025 | 16.2 °C |
What this means for you: Since 1968, Salmon's last spring frost has come about 2 days earlier per decade, on average. The frost-free season has grown by about 5 days per decade. Year-to-year swings are large, so keep using the safe date rather than the trend.
Source: daily records from Salmon-Ksra (NOAA GHCN-Daily). Years with too many missing days are left out.