When to plant in Bonsall, CA
Planting dates worked out from Bonsall's own frost records, not a generic zone chart.
Frost is rare in Bonsall: in 16 of the last 23 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
Feb 17
1 year in 10 has a later frost
Average last frost
Jan 16
about a 50% chance of a later one
Average first fall frost
Dec 30
1 year in 10 by Dec 31
Frost-free days
363
median, 1991–2020
Station used: Vista · 6.0 km away · station 131 m, town 55 m. How we match towns to stations
Bonsall'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 |
|---|---|
| 1963 | Jan 19 |
| 1964 | Mar 8 |
| 1965 | Jan 8 |
| 1966 | Mar 3 |
| 1967 | Mar 30 |
| 1968 | Jan 30 |
| 1969 | Mar 15 |
| 1970 | Jan 31 |
| 1971 | Mar 2 |
| 1972 | Jan 9 |
| 1973 | Jan 22 |
| 1974 | Feb 8 |
| 1975 | Feb 22 |
| 1976 | Jan 2 |
| 1977 | Mar 2 |
| 1979 | Jan 30 |
| 1982 | Jan 9 |
| 1985 | Feb 7 |
| 1989 | Jan 7 |
| 1990 | Feb 15 |
| 2001 | Jan 27 |
| 2003 | May 12 |
| 2012 | Mar 7 |
| 2013 | Jan 15 |
| 2016 | Feb 2 |
| 2018 | Feb 20 |
| 2020 | Feb 5 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1963 | 345 |
| 1964 | 297 |
| 1965 | 356 |
| 1966 | 300 |
| 1969 | 289 |
| 1970 | 333 |
| 1971 | 280 |
| 1974 | 318 |
| 1975 | 296 |
| 1976 | 362 |
| 1977 | 303 |
| 1978 | 339 |
| 1979 | 334 |
| 1980 | 363 |
| 1981 | 363 |
| 1982 | 355 |
| 1983 | 363 |
| 1984 | 363 |
| 1985 | 326 |
| 1986 | 363 |
| 1988 | 362 |
| 1989 | 357 |
| 1991 | 363 |
| 1992 | 363 |
| 1994 | 363 |
| 1995 | 363 |
| 1996 | 363 |
| 1997 | 363 |
| 1999 | 363 |
| 2000 | 363 |
| 2001 | 337 |
| 2002 | 363 |
| 2003 | 211 |
| 2005 | 363 |
| 2009 | 363 |
| 2012 | 298 |
| 2013 | 349 |
| 2014 | 363 |
| 2015 | 363 |
| 2016 | 331 |
| 2017 | 363 |
| 2018 | 313 |
| 2019 | 363 |
| 2020 | 328 |
| 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 |
|---|---|
| 1963 | 18.6 °C |
| 1964 | 17.9 °C |
| 1965 | 18.0 °C |
| 1966 | 18.9 °C |
| 1967 | 18.2 °C |
| 1968 | 18.8 °C |
| 1969 | 19.2 °C |
| 1970 | 19.1 °C |
| 1971 | 18.7 °C |
| 1973 | 18.5 °C |
| 1974 | 18.7 °C |
| 1975 | 17.2 °C |
| 1976 | 18.7 °C |
| 1977 | 18.4 °C |
| 1978 | 19.6 °C |
| 1979 | 19.9 °C |
| 1980 | 19.2 °C |
| 1981 | 20.9 °C |
| 1982 | 19.6 °C |
| 1983 | 20.5 °C |
| 1984 | 21.9 °C |
| 1985 | 20.8 °C |
| 1986 | 19.9 °C |
| 1988 | 19.4 °C |
| 1989 | 19.9 °C |
| 1990 | 20.6 °C |
| 1991 | 19.5 °C |
| 1992 | 21.9 °C |
| 1994 | 20.6 °C |
| 1995 | 20.0 °C |
| 1996 | 21.3 °C |
| 1997 | 21.2 °C |
| 1999 | 19.7 °C |
| 2000 | 21.5 °C |
| 2001 | 19.1 °C |
| 2002 | 18.9 °C |
| 2003 | 18.7 °C |
| 2005 | 19.3 °C |
| 2010 | 18.6 °C |
| 2012 | 20.4 °C |
| 2013 | 19.9 °C |
| 2014 | 20.8 °C |
| 2015 | 20.5 °C |
| 2016 | 20.1 °C |
| 2017 | 20.2 °C |
| 2018 | 20.3 °C |
| 2019 | 19.6 °C |
| 2020 | 20.5 °C |
| 2021 | 19.7 °C |
| 2022 | 20.6 °C |
| 2023 | 19.1 °C |
| 2024 | 20.2 °C |
| 2025 | 20.2 °C |
What this means for you: This station's record is too short to show a reliable trend yet.
Source: daily records from Vista (NOAA GHCN-Daily). Years with too many missing days are left out.