When to plant in Silver Summit, UT

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

Safe to plant out

Jun 23

1 year in 10 has a later frost

Average last frost

Jun 10

about a 50% chance of a later one

Average first fall frost

Sep 11

1 year in 10 by Aug 29

Frost-free days

median, 1991–2020

Station used: Kamas · 20.4 km away · station 1975 m, town 1997 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	Apr 28 – May 12	Jun 23 – Jul 7	Aug 17
Sweet pepper	Apr 14 – Apr 28	Jun 23 – Jul 7	Aug 22
Lettuce (leaf)	Apr 8 – Apr 15	May 13 – May 27	Jun 22
Peas	—	Apr 29 – May 27	Jun 23
Bush beans	—	Jun 16 – Jul 7	Aug 5
Carrot	—	May 20 – Jul 1	Jul 19
Beet	—	May 13 – Jun 24	Jul 2
Potato	—	May 20 – Jun 10	Jul 29
Kale	Apr 1 – Apr 15	May 13 – May 27	Jun 25
Broccoli	Apr 1 – Apr 15	May 13 – Jun 3	Jul 12
Cucumber	May 26 – Jun 2	Jun 23 – Jul 7	Aug 12
Summer squash and zucchini	May 26 – Jun 2	Jun 23 – Jul 7	Aug 7
Winter squash Season likely too short	May 26 – Jun 2	Jun 23 – Jul 7	Sep 11
Sweet corn	—	Jun 16 – Jul 7	Aug 15
Onion (from sets)	—	May 13 – Jun 3	Aug 11
Garlic	—	Aug 28 – Sep 25 (fall)	following summer
Spinach	—	Apr 29 – May 27	Jun 6
Basil	May 12 – May 26	Jun 23 – Jul 7	Aug 19

Plan all 65 crops for Silver Summit

Silver Summit'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 25
1951	Jun 11
1952	Jun 16
1953	Jun 25
1954	Jun 12
1955	Jun 30
1957	May 26
1958	Jun 4
1959	Jun 30
1960	Jun 24
1961	Jun 3
1962	Jun 6
1970	Jun 12
1972	May 23
1976	Jun 24
1978	Jun 26
1979	Jun 9
1981	Jun 16
1982	Jun 18
1983	Jul 4
1984	Jun 11
1985	Jun 27
1986	May 23
1987	Jun 2
1989	Jun 21
1990	Jun 17
1991	Jun 15
1992	Jun 14
1993	Jul 5
1994	Jun 10
1995	Jun 22
1996	Jun 2
1997	Jul 2
1998	Jun 18
1999	May 17
2000	Jun 20
2001	Jun 13
2003	May 21
2004	May 30
2005	Jun 11
2006	May 28
2007	Jun 9
2010	Jun 18
2012	Jun 11
2013	Jun 21
2015	May 16
2016	May 27
2017	May 27
2018	Jun 11
2019	Jun 23
2020	Jun 18
2021	Jun 11
2022	Jun 15
2023	May 9
2024	Jun 18
2025	May 20
2026	Jun 11

Each year's frost-free daysLong-term trend

See the data as a table

Year	Frost-free days
1950	34
1951	89
1952	88
1953	70
1954	95
1955	82
1957	105
1958	103
1959	83
1961	91
1962	78
1970	87
1972	112
1978	79
1982	85
1983	77
1984	102
1985	84
1986	110
1989	63
1990	72
1991	91
1992	70
1993	56
1994	95
1995	81
1996	65
1997	95
1998	107
1999	117
2000	94
2001	85
2003	114
2004	97
2006	110
2007	92
2010	79
2012	93
2013	89
2015	112
2016	105
2017	112
2018	101
2019	89
2020	82
2021	100
2022	118
2023	136
2024	86
2025	138

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

See the data as a table

Year	Growing-season temperature
1950	12.2 °C
1951	12.3 °C
1952	13.7 °C
1953	13.0 °C
1954	14.0 °C
1955	13.1 °C
1957	13.2 °C
1958	14.0 °C
1959	13.3 °C
1961	13.9 °C
1962	14.2 °C
1970	12.6 °C
1971	13.3 °C
1972	13.7 °C
1978	13.2 °C
1982	12.9 °C
1983	12.8 °C
1984	13.0 °C
1985	13.9 °C
1986	13.2 °C
1987	13.6 °C
1989	14.0 °C
1990	13.4 °C
1991	12.9 °C
1992	14.2 °C
1993	12.4 °C
1994	15.1 °C
1995	12.6 °C
1997	14.2 °C
1998	14.1 °C
2000	15.9 °C
2003	15.1 °C
2004	14.4 °C
2006	15.2 °C
2007	15.7 °C
2008	14.6 °C
2013	14.8 °C
2015	14.6 °C
2016	14.4 °C
2017	14.5 °C
2018	15.5 °C
2019	13.9 °C
2020	14.8 °C
2021	15.2 °C
2022	14.8 °C
2023	13.7 °C
2024	14.9 °C
2025	15.2 °C

What this means for you: Since 1950, Silver Summit's last spring frost has come about 2 days earlier per decade, on average. The frost-free season has grown by about 3 days per decade. Year-to-year swings are large, so keep using the safe date rather than the trend.

Source: daily records from Kamas (NOAA GHCN-Daily). Years with too many missing days are left out.

Nearby towns

Snyderville Summit Park Park City Oakley Kamas Coalville