When to plant in Nephi, UT
Planting dates worked out from Nephi's own frost records, not a generic zone chart.
Safe to plant out
May 29
1 year in 10 has a later frost
Average last frost
May 11
about a 50% chance of a later one
Average first fall frost
Oct 6
1 year in 10 by Sep 22
Frost-free days
151
median, 1991–2020
Station used: Nephi · 0.4 km away · station 1568 m, town 1563 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 3 – Apr 17 | May 29 – Jun 12 | Jul 23 |
| Sweet pepper | Mar 20 – Apr 3 | May 29 – Jun 12 | Jul 28 |
| Lettuce (leaf) | Mar 9 – Mar 16 | Apr 13 – Apr 27 | May 23 |
| Peas | — | Mar 30 – Apr 27 | May 24 |
| Bush beans | — | May 22 – Jun 12 | Jul 11 |
| Carrot | — | Apr 20 – Jun 1 | Jun 19 |
| Beet | — | Apr 13 – May 25 | Jun 2 |
| Potato | — | Apr 20 – May 11 | Jun 29 |
| Kale | Mar 2 – Mar 16 | Apr 13 – Apr 27 | May 26 |
| Broccoli | Mar 2 – Mar 16 | Apr 13 – May 4 | Jun 12 |
| Cucumber | May 1 – May 8 | May 29 – Jun 12 | Jul 18 |
| Summer squash and zucchini | May 1 – May 8 | May 29 – Jun 12 | Jul 13 |
| Winter squash | May 1 – May 8 | May 29 – Jun 12 | Aug 17 |
| Sweet corn | — | May 22 – Jun 12 | Jul 21 |
| Onion (from sets) | — | Apr 13 – May 4 | Jul 12 |
| Garlic | — | Sep 22 – Oct 20 (fall) | following summer |
| Spinach | — | Mar 30 – Apr 27 | May 7 |
| Basil | Apr 17 – May 1 | May 29 – Jun 12 | Jul 25 |
Nephi'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 |
|---|---|
| 1943 | Jun 3 |
| 1944 | May 4 |
| 1945 | May 20 |
| 1946 | May 30 |
| 1947 | Apr 20 |
| 1949 | Apr 13 |
| 1950 | May 20 |
| 1951 | May 13 |
| 1952 | Apr 12 |
| 1953 | May 13 |
| 1954 | May 28 |
| 1955 | May 28 |
| 1956 | May 14 |
| 1957 | Apr 28 |
| 1958 | Apr 29 |
| 1959 | May 21 |
| 1960 | May 19 |
| 1961 | May 6 |
| 1962 | Jun 7 |
| 1963 | May 12 |
| 1965 | May 11 |
| 1966 | May 23 |
| 1967 | May 14 |
| 1968 | May 17 |
| 1969 | Apr 28 |
| 1970 | May 15 |
| 1971 | May 18 |
| 1972 | May 9 |
| 1973 | May 2 |
| 1974 | May 21 |
| 1975 | May 25 |
| 1976 | Jun 14 |
| 1977 | Jun 1 |
| 1979 | Jun 9 |
| 1980 | May 26 |
| 1981 | May 13 |
| 1982 | Jun 6 |
| 1983 | May 18 |
| 1984 | May 8 |
| 1985 | May 14 |
| 1986 | May 17 |
| 1987 | Apr 22 |
| 1988 | May 8 |
| 1989 | May 20 |
| 1990 | Jun 1 |
| 1991 | May 20 |
| 1992 | Apr 24 |
| 1993 | May 9 |
| 1994 | May 20 |
| 1995 | May 13 |
| 1996 | May 5 |
| 1997 | May 3 |
| 1998 | Apr 21 |
| 1999 | May 17 |
| 2000 | May 12 |
| 2001 | Jun 13 |
| 2002 | Jun 10 |
| 2003 | May 19 |
| 2004 | Apr 11 |
| 2005 | Jun 10 |
| 2007 | May 22 |
| 2009 | Apr 27 |
| 2010 | May 24 |
| 2011 | May 5 |
| 2012 | May 7 |
| 2013 | May 2 |
| 2014 | May 13 |
| 2015 | Apr 26 |
| 2016 | May 11 |
| 2017 | May 18 |
| 2018 | Apr 18 |
| 2019 | May 2 |
| 2020 | May 8 |
| 2021 | Apr 28 |
| 2022 | May 31 |
| 2023 | Apr 26 |
| 2024 | May 9 |
| 2025 | May 19 |
| 2026 | May 19 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1943 | 131 |
| 1944 | 165 |
| 1945 | 121 |
| 1946 | 110 |
| 1947 | 186 |
| 1949 | 177 |
| 1950 | 133 |
| 1951 | 145 |
| 1952 | 185 |
| 1953 | 142 |
| 1954 | 124 |
| 1955 | 130 |
| 1956 | 130 |
| 1957 | 158 |
| 1958 | 148 |
| 1959 | 129 |
| 1960 | 149 |
| 1961 | 140 |
| 1962 | 93 |
| 1963 | 171 |
| 1965 | 128 |
| 1966 | 133 |
| 1967 | 145 |
| 1968 | 126 |
| 1969 | 157 |
| 1970 | 129 |
| 1971 | 123 |
| 1972 | 143 |
| 1973 | 154 |
| 1974 | 137 |
| 1975 | 135 |
| 1976 | 111 |
| 1977 | 113 |
| 1979 | 133 |
| 1980 | 118 |
| 1981 | 148 |
| 1982 | 117 |
| 1983 | 124 |
| 1984 | 139 |
| 1985 | 131 |
| 1986 | 124 |
| 1987 | 176 |
| 1988 | 133 |
| 1989 | 137 |
| 1990 | 128 |
| 1991 | 125 |
| 1992 | 154 |
| 1993 | 127 |
| 1994 | 139 |
| 1995 | 131 |
| 1996 | 135 |
| 1997 | 161 |
| 1998 | 166 |
| 1999 | 133 |
| 2000 | 154 |
| 2001 | 118 |
| 2002 | 123 |
| 2003 | 144 |
| 2004 | 203 |
| 2005 | 116 |
| 2007 | 129 |
| 2009 | 156 |
| 2010 | 153 |
| 2011 | 153 |
| 2012 | 152 |
| 2013 | 154 |
| 2014 | 166 |
| 2015 | 191 |
| 2016 | 147 |
| 2017 | 130 |
| 2018 | 178 |
| 2019 | 150 |
| 2020 | 160 |
| 2021 | 167 |
| 2022 | 144 |
| 2023 | 169 |
| 2024 | 161 |
| 2025 | 150 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1943 | 18.5 °C |
| 1944 | 17.3 °C |
| 1945 | 16.7 °C |
| 1946 | 18.8 °C |
| 1947 | 18.4 °C |
| 1949 | 19.1 °C |
| 1950 | 18.3 °C |
| 1951 | 18.8 °C |
| 1952 | 19.7 °C |
| 1953 | 18.4 °C |
| 1954 | 19.3 °C |
| 1955 | 18.3 °C |
| 1956 | 17.6 °C |
| 1957 | 17.5 °C |
| 1958 | 18.9 °C |
| 1959 | 18.3 °C |
| 1960 | 19.0 °C |
| 1961 | 18.1 °C |
| 1962 | 18.2 °C |
| 1965 | 16.2 °C |
| 1966 | 19.0 °C |
| 1967 | 17.2 °C |
| 1968 | 16.3 °C |
| 1969 | 19.0 °C |
| 1970 | 17.0 °C |
| 1971 | 17.2 °C |
| 1972 | 18.0 °C |
| 1973 | 17.3 °C |
| 1974 | 18.2 °C |
| 1975 | 15.7 °C |
| 1976 | 17.8 °C |
| 1977 | 18.5 °C |
| 1979 | 18.0 °C |
| 1980 | 17.5 °C |
| 1981 | 18.7 °C |
| 1982 | 17.0 °C |
| 1983 | 16.6 °C |
| 1984 | 17.4 °C |
| 1985 | 18.4 °C |
| 1986 | 18.3 °C |
| 1987 | 18.6 °C |
| 1988 | 18.9 °C |
| 1989 | 19.1 °C |
| 1990 | 19.3 °C |
| 1991 | 17.1 °C |
| 1992 | 18.6 °C |
| 1993 | 16.7 °C |
| 1994 | 19.1 °C |
| 1995 | 16.7 °C |
| 1996 | 18.1 °C |
| 1997 | 17.4 °C |
| 1998 | 17.4 °C |
| 1999 | 17.4 °C |
| 2000 | 19.5 °C |
| 2001 | 18.7 °C |
| 2002 | 18.2 °C |
| 2003 | 19.3 °C |
| 2007 | 19.8 °C |
| 2009 | 17.5 °C |
| 2010 | 17.1 °C |
| 2011 | 17.0 °C |
| 2012 | 19.1 °C |
| 2013 | 18.3 °C |
| 2014 | 18.3 °C |
| 2015 | 18.7 °C |
| 2016 | 18.7 °C |
| 2017 | 18.3 °C |
| 2018 | 19.4 °C |
| 2019 | 17.8 °C |
| 2020 | 19.3 °C |
| 2021 | 19.2 °C |
| 2022 | 19.1 °C |
| 2023 | 18.2 °C |
| 2024 | 18.9 °C |
| 2025 | 19.3 °C |
What this means for you: Since 1943, Nephi's last spring frost has stayed at about the same time of year. 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 Nephi (NOAA GHCN-Daily). Years with too many missing days are left out.