When to plant in Ephraim, UT
Planting dates worked out from Ephraim's own frost records, not a generic zone chart.
Safe to plant out
Jun 8
1 year in 10 has a later frost
Average last frost
May 27
about a 50% chance of a later one
Average first fall frost
Sep 20
1 year in 10 by Sep 10
Frost-free days
116
median, 1991–2020
Station used: Ephraim · 1.1 km away · station 1676 m, town 1689 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 13 – Apr 27 | Jun 8 – Jun 22 | Aug 2 |
| Sweet pepper | Mar 30 – Apr 13 | Jun 8 – Jun 22 | Aug 7 |
| Lettuce (leaf) | Mar 25 – Apr 1 | Apr 29 – May 13 | Jun 8 |
| Peas | — | Apr 15 – May 13 | Jun 9 |
| Bush beans | — | Jun 1 – Jun 22 | Jul 21 |
| Carrot | — | May 6 – Jun 17 | Jul 5 |
| Beet | — | Apr 29 – Jun 10 | Jun 18 |
| Potato | — | May 6 – May 27 | Jul 15 |
| Kale | Mar 18 – Apr 1 | Apr 29 – May 13 | Jun 11 |
| Broccoli | Mar 18 – Apr 1 | Apr 29 – May 20 | Jun 28 |
| Cucumber | May 11 – May 18 | Jun 8 – Jun 22 | Jul 28 |
| Summer squash and zucchini | May 11 – May 18 | Jun 8 – Jun 22 | Jul 23 |
| Winter squash | May 11 – May 18 | Jun 8 – Jun 22 | Aug 27 |
| Sweet corn | — | Jun 1 – Jun 22 | Jul 31 |
| Onion (from sets) | — | Apr 29 – May 20 | Jul 28 |
| Garlic | — | Sep 6 – Oct 4 (fall) | following summer |
| Spinach | — | Apr 15 – May 13 | May 23 |
| Basil | Apr 27 – May 11 | Jun 8 – Jun 22 | Aug 4 |
Ephraim'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 |
|---|---|
| 1950 | Jun 18 |
| 1951 | Jun 2 |
| 1952 | Apr 17 |
| 1953 | May 25 |
| 1954 | Jun 7 |
| 1955 | May 28 |
| 1956 | May 15 |
| 1957 | May 24 |
| 1958 | May 13 |
| 1959 | May 31 |
| 1960 | May 24 |
| 1961 | May 8 |
| 1962 | Jun 8 |
| 1963 | May 13 |
| 1964 | May 12 |
| 1965 | May 11 |
| 1966 | May 23 |
| 1967 | May 15 |
| 1968 | Jun 30 |
| 1969 | Apr 27 |
| 1970 | Jun 10 |
| 1971 | May 19 |
| 1972 | May 21 |
| 1973 | Jun 20 |
| 1974 | Jun 9 |
| 1975 | May 21 |
| 1976 | Jun 15 |
| 1977 | May 21 |
| 1978 | Jun 1 |
| 1979 | Jun 9 |
| 1980 | Apr 17 |
| 1981 | Jun 15 |
| 1982 | Jun 6 |
| 1983 | Jun 14 |
| 1984 | Jun 9 |
| 1985 | May 14 |
| 1986 | May 17 |
| 1987 | May 3 |
| 1988 | May 30 |
| 1989 | May 26 |
| 1990 | Jun 2 |
| 1991 | May 19 |
| 1992 | May 10 |
| 1993 | May 9 |
| 1994 | May 21 |
| 1995 | Jun 6 |
| 1996 | May 24 |
| 1997 | May 26 |
| 1998 | May 23 |
| 1999 | May 17 |
| 2001 | Jun 13 |
| 2002 | Jun 10 |
| 2003 | May 20 |
| 2004 | May 31 |
| 2005 | Jun 8 |
| 2006 | May 29 |
| 2007 | Jun 8 |
| 2008 | Jun 13 |
| 2009 | May 14 |
| 2010 | May 31 |
| 2011 | Jun 4 |
| 2012 | Jun 7 |
| 2013 | Jun 1 |
| 2014 | May 21 |
| 2015 | May 10 |
| 2016 | May 27 |
| 2017 | May 19 |
| 2018 | May 12 |
| 2019 | Jun 8 |
| 2020 | Jun 8 |
| 2022 | Jun 14 |
| 2023 | May 10 |
| 2024 | May 23 |
| 2025 | May 20 |
| 2026 | May 20 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1950 | 104 |
| 1951 | 101 |
| 1952 | 172 |
| 1953 | 130 |
| 1954 | 114 |
| 1955 | 121 |
| 1956 | 129 |
| 1957 | 119 |
| 1958 | 133 |
| 1959 | 119 |
| 1960 | 138 |
| 1961 | 138 |
| 1962 | 92 |
| 1963 | 153 |
| 1964 | 130 |
| 1965 | 127 |
| 1966 | 133 |
| 1967 | 120 |
| 1968 | 78 |
| 1969 | 158 |
| 1970 | 96 |
| 1971 | 122 |
| 1972 | 131 |
| 1974 | 94 |
| 1975 | 122 |
| 1976 | 109 |
| 1977 | 125 |
| 1978 | 103 |
| 1979 | 132 |
| 1980 | 157 |
| 1981 | 115 |
| 1982 | 97 |
| 1983 | 97 |
| 1984 | 107 |
| 1985 | 131 |
| 1986 | 124 |
| 1987 | 164 |
| 1988 | 111 |
| 1989 | 130 |
| 1990 | 127 |
| 1991 | 118 |
| 1992 | 149 |
| 1993 | 127 |
| 1994 | 139 |
| 1995 | 106 |
| 1996 | 116 |
| 1997 | 124 |
| 1998 | 131 |
| 1999 | 132 |
| 2001 | 87 |
| 2002 | 116 |
| 2003 | 116 |
| 2004 | 87 |
| 2005 | 83 |
| 2006 | 110 |
| 2007 | 101 |
| 2009 | 130 |
| 2010 | 102 |
| 2011 | 124 |
| 2012 | 99 |
| 2013 | 114 |
| 2014 | 132 |
| 2015 | 130 |
| 2016 | 105 |
| 2017 | 122 |
| 2018 | 130 |
| 2019 | 100 |
| 2020 | 93 |
| 2022 | 116 |
| 2023 | 134 |
| 2024 | 129 |
| 2025 | 137 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1950 | 15.0 °C |
| 1951 | 15.4 °C |
| 1952 | 16.6 °C |
| 1953 | 15.4 °C |
| 1954 | 16.6 °C |
| 1955 | 15.6 °C |
| 1956 | 16.4 °C |
| 1957 | 15.4 °C |
| 1958 | 16.6 °C |
| 1959 | 16.4 °C |
| 1960 | 16.9 °C |
| 1961 | 15.9 °C |
| 1962 | 15.8 °C |
| 1963 | 15.9 °C |
| 1964 | 15.4 °C |
| 1965 | 14.5 °C |
| 1966 | 17.0 °C |
| 1967 | 15.4 °C |
| 1968 | 14.2 °C |
| 1969 | 16.8 °C |
| 1970 | 15.5 °C |
| 1971 | 15.7 °C |
| 1972 | 16.3 °C |
| 1974 | 16.7 °C |
| 1975 | 14.4 °C |
| 1976 | 16.4 °C |
| 1977 | 16.6 °C |
| 1978 | 15.4 °C |
| 1979 | 16.2 °C |
| 1980 | 15.9 °C |
| 1981 | 17.6 °C |
| 1982 | 15.9 °C |
| 1983 | 14.9 °C |
| 1984 | 16.1 °C |
| 1985 | 16.6 °C |
| 1986 | 16.3 °C |
| 1987 | 16.7 °C |
| 1988 | 16.8 °C |
| 1989 | 16.7 °C |
| 1990 | 17.6 °C |
| 1991 | 16.1 °C |
| 1992 | 17.6 °C |
| 1993 | 15.7 °C |
| 1994 | 18.6 °C |
| 1995 | 15.0 °C |
| 1996 | 16.6 °C |
| 1997 | 16.3 °C |
| 1998 | 16.1 °C |
| 1999 | 16.0 °C |
| 2001 | 18.2 °C |
| 2002 | 18.2 °C |
| 2003 | 18.2 °C |
| 2004 | 16.0 °C |
| 2005 | 16.0 °C |
| 2006 | 15.7 °C |
| 2007 | 15.8 °C |
| 2009 | 15.3 °C |
| 2010 | 14.8 °C |
| 2011 | 14.9 °C |
| 2012 | 16.7 °C |
| 2013 | 15.9 °C |
| 2014 | 16.1 °C |
| 2015 | 16.3 °C |
| 2016 | 16.3 °C |
| 2017 | 16.3 °C |
| 2018 | 17.5 °C |
| 2019 | 15.3 °C |
| 2020 | 16.3 °C |
| 2021 | 17.9 °C |
| 2022 | 17.0 °C |
| 2023 | 16.4 °C |
| 2024 | 17.2 °C |
| 2025 | 17.0 °C |
What this means for you: Since 1950, Ephraim's last spring frost has stayed at about the same time of year. The frost-free season has shrunk by about 1 days per decade. Year-to-year swings are large, so keep using the safe date rather than the trend.
Source: daily records from Ephraim (NOAA GHCN-Daily). Years with too many missing days are left out.