When to plant in Arcata, CA
Planting dates worked out from Arcata's own frost records, not a generic zone chart.
Safe to plant out
Mar 31
1 year in 10 has a later frost
Average last frost
Feb 10
about a 50% chance of a later one
Average first fall frost
Dec 8
1 year in 10 by Nov 22
Frost-free days
302
median, 1991–2020
Station used: Eureka Wfo Woodley Is · 9.1 km away · station 6 m, town 7 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 | Mar 15 – Mar 29 | May 10 – May 24 | Jul 4 |
| Sweet pepper | Mar 1 – Mar 15 | May 10 – May 24 | Jul 9 |
| Lettuce (leaf) | Dec 9 – Dec 16 | Jan 13 – Jan 27 | Feb 22 |
| Peas | — | Dec 30 – Jan 27 | Feb 23 |
| Bush beans | — | Apr 21 – May 12 | Jun 10 |
| Carrot | — | Jan 20 – Mar 3 | Mar 21 |
| Beet | — | Jan 13 – Feb 24 | Mar 4 |
| Potato | — | Jan 20 – Feb 10 | Mar 31 |
| Kale | Dec 2 – Dec 16 | Jan 13 – Jan 27 | Feb 25 |
| Broccoli | Dec 2 – Dec 16 | Jan 13 – Feb 3 | Mar 14 |
| Cucumber | Apr 12 – Apr 19 | May 10 – May 24 | Jun 29 |
| Summer squash and zucchini | Apr 12 – Apr 19 | May 10 – May 24 | Jun 24 |
| Winter squash | Apr 12 – Apr 19 | May 10 – May 24 | Jul 29 |
| Sweet corn | — | Apr 21 – May 12 | Jun 20 |
| Onion (from sets) | — | Jan 13 – Feb 3 | Apr 13 |
| Garlic | — | Nov 10 – Dec 8 (fall) | following summer |
| Spinach | — | Dec 30 – Jan 27 | Feb 6 |
| Basil | Mar 29 – Apr 12 | May 10 – May 24 | Jul 6 |
Arcata'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 |
|---|---|
| 1942 | Jan 2 |
| 1943 | Feb 9 |
| 1945 | Jan 21 |
| 1946 | Feb 12 |
| 1947 | Jan 15 |
| 1948 | Feb 11 |
| 1949 | Feb 13 |
| 1950 | Mar 12 |
| 1951 | Mar 10 |
| 1952 | Mar 13 |
| 1954 | Mar 12 |
| 1955 | Mar 15 |
| 1956 | Feb 16 |
| 1957 | Jan 30 |
| 1960 | Jan 15 |
| 1962 | Feb 27 |
| 1963 | Jan 12 |
| 1965 | Jan 8 |
| 1966 | Mar 17 |
| 1967 | Jan 6 |
| 1968 | Jan 11 |
| 1969 | Jan 23 |
| 1971 | Feb 26 |
| 1972 | Feb 2 |
| 1973 | Jan 26 |
| 1974 | Feb 23 |
| 1975 | Feb 21 |
| 1976 | Mar 1 |
| 1977 | Mar 10 |
| 1979 | Feb 3 |
| 1980 | Jan 30 |
| 1982 | Mar 17 |
| 1984 | Feb 22 |
| 1985 | Feb 4 |
| 1987 | Jan 17 |
| 1989 | Feb 8 |
| 1990 | Feb 18 |
| 1993 | Jan 3 |
| 1995 | Feb 15 |
| 1996 | Feb 26 |
| 1997 | Mar 4 |
| 1999 | Apr 1 |
| 2001 | Apr 4 |
| 2002 | Mar 18 |
| 2003 | Feb 8 |
| 2004 | Feb 8 |
| 2005 | Jan 12 |
| 2006 | Mar 11 |
| 2007 | Jan 18 |
| 2008 | Mar 31 |
| 2009 | Mar 11 |
| 2011 | Feb 27 |
| 2012 | Apr 6 |
| 2013 | Feb 26 |
| 2014 | Feb 5 |
| 2016 | Jan 2 |
| 2017 | Jan 13 |
| 2018 | Mar 5 |
| 2019 | Feb 22 |
| 2020 | Mar 16 |
| 2021 | Mar 16 |
| 2022 | Feb 25 |
| 2023 | Mar 2 |
| 2024 | Jan 11 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1942 | 362 |
| 1943 | 324 |
| 1944 | 363 |
| 1945 | 324 |
| 1946 | 320 |
| 1947 | 349 |
| 1948 | 295 |
| 1949 | 300 |
| 1950 | 293 |
| 1951 | 271 |
| 1952 | 292 |
| 1953 | 363 |
| 1954 | 288 |
| 1955 | 244 |
| 1956 | 292 |
| 1957 | 334 |
| 1958 | 318 |
| 1959 | 363 |
| 1960 | 349 |
| 1961 | 343 |
| 1962 | 299 |
| 1963 | 352 |
| 1964 | 316 |
| 1965 | 341 |
| 1966 | 284 |
| 1967 | 340 |
| 1968 | 341 |
| 1969 | 341 |
| 1970 | 351 |
| 1971 | 244 |
| 1972 | 305 |
| 1973 | 338 |
| 1974 | 302 |
| 1975 | 269 |
| 1976 | 304 |
| 1977 | 252 |
| 1978 | 315 |
| 1979 | 296 |
| 1980 | 310 |
| 1981 | 363 |
| 1982 | 281 |
| 1983 | 354 |
| 1984 | 299 |
| 1985 | 279 |
| 1986 | 363 |
| 1987 | 340 |
| 1988 | 347 |
| 1989 | 325 |
| 1990 | 304 |
| 1991 | 352 |
| 1992 | 363 |
| 1993 | 324 |
| 1994 | 320 |
| 1995 | 318 |
| 1996 | 307 |
| 1997 | 289 |
| 1998 | 341 |
| 1999 | 273 |
| 2000 | 314 |
| 2001 | 236 |
| 2002 | 287 |
| 2003 | 286 |
| 2004 | 292 |
| 2005 | 326 |
| 2006 | 262 |
| 2007 | 324 |
| 2008 | 259 |
| 2009 | 269 |
| 2010 | 325 |
| 2011 | 280 |
| 2012 | 250 |
| 2013 | 268 |
| 2014 | 327 |
| 2015 | 328 |
| 2016 | 338 |
| 2017 | 324 |
| 2018 | 297 |
| 2019 | 277 |
| 2020 | 237 |
| 2021 | 289 |
| 2022 | 276 |
| 2023 | 268 |
| 2024 | 353 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1942 | 13.1 °C |
| 1943 | 12.8 °C |
| 1944 | 12.1 °C |
| 1945 | 12.2 °C |
| 1946 | 12.8 °C |
| 1947 | 13.6 °C |
| 1948 | 12.4 °C |
| 1949 | 12.6 °C |
| 1950 | 12.0 °C |
| 1951 | 12.0 °C |
| 1952 | 12.1 °C |
| 1953 | 12.5 °C |
| 1954 | 12.4 °C |
| 1955 | 11.3 °C |
| 1956 | 12.5 °C |
| 1957 | 13.4 °C |
| 1958 | 13.7 °C |
| 1959 | 12.6 °C |
| 1960 | 12.0 °C |
| 1961 | 12.5 °C |
| 1962 | 12.3 °C |
| 1963 | 13.0 °C |
| 1964 | 11.9 °C |
| 1965 | 11.8 °C |
| 1966 | 12.5 °C |
| 1967 | 12.3 °C |
| 1968 | 12.7 °C |
| 1969 | 12.6 °C |
| 1970 | 11.8 °C |
| 1971 | 12.3 °C |
| 1972 | 12.5 °C |
| 1973 | 12.3 °C |
| 1974 | 12.4 °C |
| 1975 | 11.7 °C |
| 1976 | 12.2 °C |
| 1977 | 12.3 °C |
| 1978 | 12.8 °C |
| 1979 | 13.5 °C |
| 1980 | 12.7 °C |
| 1981 | 12.9 °C |
| 1982 | 13.4 °C |
| 1983 | 14.4 °C |
| 1984 | 13.5 °C |
| 1985 | 13.3 °C |
| 1986 | 13.3 °C |
| 1987 | 14.1 °C |
| 1988 | 13.6 °C |
| 1989 | 14.0 °C |
| 1990 | 14.3 °C |
| 1991 | 12.9 °C |
| 1992 | 14.5 °C |
| 1993 | 13.9 °C |
| 1994 | 14.0 °C |
| 1995 | 13.7 °C |
| 1996 | 13.1 °C |
| 1997 | 14.7 °C |
| 1998 | 13.3 °C |
| 1999 | 12.4 °C |
| 2000 | 13.8 °C |
| 2001 | 13.0 °C |
| 2002 | 13.1 °C |
| 2003 | 13.7 °C |
| 2004 | 14.3 °C |
| 2005 | 13.4 °C |
| 2006 | 13.1 °C |
| 2007 | 13.5 °C |
| 2008 | 12.4 °C |
| 2009 | 13.3 °C |
| 2010 | 12.5 °C |
| 2011 | 12.6 °C |
| 2012 | 12.2 °C |
| 2013 | 13.6 °C |
| 2014 | 13.9 °C |
| 2015 | 13.8 °C |
| 2016 | 13.6 °C |
| 2017 | 13.7 °C |
| 2018 | 13.2 °C |
| 2019 | 14.2 °C |
| 2020 | 13.9 °C |
| 2021 | 12.7 °C |
| 2022 | 13.4 °C |
| 2023 | 13.2 °C |
| 2024 | 13.1 °C |
What this means for you: Since 1942, Arcata's last spring frost has come about 2 days later per decade, on average. The frost-free season has shrunk 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 Eureka Wfo Woodley Is (NOAA GHCN-Daily). Years with too many missing days are left out.