When to plant in East Pasadena, CA

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

Frost is rare in East Pasadena: in 28 of the last 29 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

Jan 1

1 year in 10 has a later frost

Average last frost

Jan 1

about a 50% chance of a later one

Average first fall frost

Dec 31

1 year in 10 by Dec 31

Frost-free days

363

median, 1991–2020

Station used: Pasadena · 6.6 km away · station 263 m, town 221 m. How we match towns to stations

East Pasadena'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
1893	Mar 10
1909	Jan 23
1910	Feb 3
1911	Feb 26
1912	Jan 3
1913	Mar 25
1914	Jan 28
1915	May 1
1916	Feb 1
1917	Apr 18
1918	Feb 19
1919	Mar 15
1920	Jan 15
1921	Feb 20
1922	Mar 12
1923	Mar 5
1924	Jan 3
1928	Jan 19
1929	Mar 25
1930	Jan 13
1932	Feb 19
1933	Feb 10
1935	Mar 9
1937	Jan 27
1939	Feb 5
1942	Feb 16
1943	Jan 19
1946	Feb 5
1947	Jan 16
1948	Feb 13
1949	Feb 15
1950	Feb 1
1951	Feb 28
1952	Jan 9
1955	Feb 19
1957	Jan 28
1960	Jan 13
1963	Jan 14
1970	Jan 4
1971	Jan 7
1973	Jan 5
1975	Jan 29
1985	Feb 3
1989	Feb 6
1990	Mar 13
2007	Jan 14

Each year's frost-free daysLong-term trend

See the data as a table

Year	Frost-free days
1893	295
1909	314
1910	330
1911	275
1912	341
1913	253
1914	319
1915	228
1916	285
1917	256
1918	307
1919	257
1920	339
1921	270
1922	236
1923	281
1924	348
1925	363
1926	355
1927	363
1928	331
1929	280
1930	351
1931	325
1932	294
1933	291
1934	363
1935	296
1936	362
1937	337
1938	315
1939	328
1940	363
1941	357
1942	317
1943	345
1944	363
1945	363
1946	328
1947	310
1948	304
1949	299
1950	332
1951	282
1952	355
1953	363
1954	360
1955	314
1956	363
1957	336
1958	363
1959	363
1960	351
1961	363
1962	363
1963	350
1964	363
1965	363
1966	363
1967	352
1968	353
1969	363
1970	360
1971	357
1972	341
1974	356
1975	335
1976	331
1977	363
1980	363
1981	363
1982	363
1983	326
1984	363
1985	310
1986	363
1987	358
1988	361
1989	327
1990	283
1991	363
1992	363
1993	363
1994	363
1995	363
1996	363
1997	363
1998	354
1999	363
2000	363
2001	363
2002	363
2003	363
2004	363
2006	363
2007	350
2008	363
2009	363
2010	363
2011	363
2012	363
2013	363
2014	363
2015	363
2016	363
2017	363
2018	363
2019	363
2020	363
2021	363
2022	363
2023	363
2024	363
2025	363

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

See the data as a table

Year	Growing-season temperature
1909	19.6 °C
1910	20.4 °C
1911	18.2 °C
1912	18.2 °C
1913	19.1 °C
1914	19.1 °C
1915	18.9 °C
1916	18.5 °C
1917	19.1 °C
1918	19.7 °C
1919	19.7 °C
1920	19.5 °C
1921	19.0 °C
1922	20.1 °C
1923	19.1 °C
1924	20.1 °C
1925	20.0 °C
1927	20.1 °C
1928	20.5 °C
1929	20.6 °C
1930	19.9 °C
1931	21.9 °C
1932	19.5 °C
1933	18.9 °C
1934	21.0 °C
1935	20.0 °C
1936	20.9 °C
1937	20.6 °C
1938	20.5 °C
1939	20.6 °C
1940	20.1 °C
1941	19.4 °C
1942	19.4 °C
1943	20.1 °C
1944	19.0 °C
1945	19.9 °C
1946	20.5 °C
1947	20.5 °C
1948	19.3 °C
1949	20.2 °C
1950	19.4 °C
1951	19.7 °C
1952	20.3 °C
1953	19.6 °C
1954	20.4 °C
1955	20.1 °C
1956	20.4 °C
1957	21.2 °C
1958	21.5 °C
1959	21.9 °C
1960	22.1 °C
1961	20.9 °C
1962	20.7 °C
1963	20.5 °C
1964	20.1 °C
1965	19.9 °C
1966	21.5 °C
1967	20.8 °C
1968	21.0 °C
1969	21.0 °C
1970	21.3 °C
1971	21.2 °C
1972	21.7 °C
1973	20.9 °C
1974	21.3 °C
1975	19.9 °C
1976	20.4 °C
1977	20.7 °C
1979	21.5 °C
1980	21.1 °C
1981	22.5 °C
1982	21.1 °C
1983	21.3 °C
1984	23.3 °C
1985	22.0 °C
1986	21.3 °C
1987	21.8 °C
1988	21.6 °C
1989	21.6 °C
1990	21.9 °C
1991	21.4 °C
1992	22.9 °C
1993	22.1 °C
1994	21.9 °C
1995	21.6 °C
1996	22.6 °C
1997	23.0 °C
1998	21.5 °C
1999	21.1 °C
2000	23.2 °C
2001	22.2 °C
2002	21.8 °C
2003	22.0 °C
2004	22.5 °C
2006	22.6 °C
2008	22.8 °C
2009	23.0 °C
2010	21.7 °C
2011	22.0 °C
2012	23.4 °C
2013	23.3 °C
2014	24.3 °C
2015	23.0 °C
2016	22.4 °C
2017	22.7 °C
2018	22.4 °C
2019	21.7 °C
2020	23.3 °C
2021	23.6 °C
2022	24.6 °C
2023	22.3 °C
2024	23.0 °C
2025	22.8 °C

What this means for you: Since 1893, East Pasadena's last spring frost has come about 4 days earlier per decade, on average. The frost-free season has grown by about 6 days per decade. Year-to-year swings are large, so keep using the safe date rather than the trend.

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

Nearby towns

Sierra Madre San Marino Arcadia Temple City San Gabriel North El Monte