When to plant in Ione, CA

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

Frost is rare in Ione: in 8 of the last 21 springs there was none at all. Frost dates matter less here than heat, so the planting table below is left out.

Safe to plant out

Mar 7

1 year in 10 has a later frost

Average last frost

Jan 24

about a 50% chance of a later one

Average first fall frost

Dec 14

1 year in 10 by Nov 24

Frost-free days

328

median, 1991–2020

Station used: Camp Pardee · 14.0 km away · station 201 m, town 91 m. How we match towns to stations

Ione'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
1929	Apr 9
1930	Jan 13
1931	Feb 20
1932	Feb 18
1933	Apr 18
1934	Jan 10
1935	Mar 8
1936	Mar 26
1937	Feb 9
1938	Jan 12
1939	Mar 4
1940	Jan 20
1941	Jan 3
1942	Mar 1
1943	Feb 9
1944	Mar 15
1945	Apr 9
1946	Mar 14
1947	Jan 18
1948	Feb 12
1949	Feb 14
1950	Mar 12
1951	Mar 11
1952	Mar 21
1953	Mar 3
1954	Mar 13
1955	Feb 28
1956	Mar 7
1957	Feb 4
1959	Jan 21
1960	Jan 17
1961	Jan 21
1962	Mar 23
1963	Apr 17
1964	Mar 7
1965	Jan 8
1966	Mar 3
1967	Jan 24
1968	Jan 9
1969	Feb 13
1970	Jan 6
1971	Mar 6
1972	Mar 26
1973	Jan 20
1974	Jan 3
1975	Feb 22
1976	Jan 11
1977	Mar 10
1978	Feb 17
1979	Feb 4
1980	Jan 22
1981	Jan 30
1982	Feb 23
1983	Jan 20
1984	Feb 22
1985	Mar 3
1987	Feb 26
1988	Jan 19
1989	Feb 9
1990	Feb 19
1991	Mar 27
1992	Feb 4
1993	Jan 13
1994	Jan 7
1996	Feb 26
1997	Jan 15
2000	Jan 6
2001	Feb 13
2002	Mar 18
2004	Jan 5
2007	Jan 17
2011	Feb 27
2012	Mar 7

Each year's frost-free daysLong-term trend

See the data as a table

Year	Frost-free days
1928	340
1929	262
1930	340
1931	274
1932	293
1933	247
1934	354
1935	297
1936	279
1937	319
1938	352
1939	292
1940	325
1941	354
1942	299
1943	324
1944	290
1945	253
1946	279
1947	320
1948	287
1949	246
1950	293
1951	270
1952	284
1953	302
1954	279
1955	305
1956	274
1957	329
1959	338
1960	322
1961	320
1962	250
1963	217
1964	296
1965	341
1966	298
1967	317
1968	326
1969	316
1970	352
1971	252
1972	253
1973	344
1974	352
1975	268
1977	253
1978	290
1979	323
1980	317
1981	334
1982	304
1983	344
1984	303
1985	280
1986	363
1987	288
1988	341
1989	304
1990	303
1991	261
1992	316
1993	314
1994	314
1995	363
1996	296
1997	339
1998	337
2000	358
2001	304
2002	278
2003	325
2004	353
2005	363
2006	331
2007	337
2008	349
2009	339
2010	326
2011	306

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

See the data as a table

Year	Growing-season temperature
1928	22.7 °C
1929	21.8 °C
1930	21.1 °C
1931	23.2 °C
1932	22.1 °C
1933	21.4 °C
1934	23.0 °C
1935	22.2 °C
1936	23.1 °C
1937	22.1 °C
1938	21.8 °C
1939	22.5 °C
1940	22.0 °C
1941	20.8 °C
1942	20.6 °C
1943	21.0 °C
1944	20.8 °C
1945	21.6 °C
1946	21.3 °C
1947	22.0 °C
1948	19.9 °C
1949	21.7 °C
1950	21.8 °C
1951	21.1 °C
1952	21.3 °C
1953	20.3 °C
1954	21.1 °C
1955	20.5 °C
1956	20.8 °C
1957	21.2 °C
1959	22.1 °C
1960	22.3 °C
1961	21.9 °C
1962	21.6 °C
1963	20.3 °C
1964	20.5 °C
1965	20.2 °C
1966	22.1 °C
1967	21.4 °C
1968	21.4 °C
1969	21.9 °C
1970	21.6 °C
1971	20.8 °C
1972	21.4 °C
1973	21.9 °C
1974	21.4 °C
1975	20.4 °C
1976	20.9 °C
1978	21.7 °C
1979	22.6 °C
1980	21.3 °C
1981	22.7 °C
1982	20.6 °C
1983	21.6 °C
1984	23.2 °C
1985	22.2 °C
1986	21.6 °C
1987	22.1 °C
1988	21.9 °C
1989	21.5 °C
1990	22.2 °C
1991	21.1 °C
1992	22.9 °C
1993	21.5 °C
1994	21.8 °C
1995	20.7 °C
1996	22.4 °C
1997	22.6 °C
1998	20.6 °C
1999	21.1 °C
2000	22.4 °C
2001	23.0 °C
2002	22.5 °C
2003	22.4 °C
2004	22.6 °C
2005	21.6 °C
2006	22.5 °C
2007	21.9 °C
2008	22.5 °C
2009	22.4 °C
2010	20.4 °C
2011	20.8 °C
2012	22.1 °C

What this means for you: Since 1929, Ione's last spring frost has come about 3 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 Camp Pardee (NOAA GHCN-Daily). Years with too many missing days are left out.

Nearby towns

Sutter Creek Jackson Clay Valley Springs Dogtown Rancho Murieta