Frost dates for San Diego Montgomery Field, California
Frost is rare here. In a typical year this station records no freeze at all, so there is no last-frost date to plan around and the growing season runs all year.
- Growing season
- All year
- Hardiness zones nearby
- 10b, 11a
- Summer days
- a usual high of about 26 °C79 °F
- Lettuce and spinach run to seed
- July to September, in hot, long days (how we know)
Summer and rain
A growing garden needs about 25 mm1 in of water a week, rain and watering together. Here is what a normal month brings.
- Nearly every drop is yours
- April to November: rain brings less than a quarter of the water a growing garden needs, about 25 mm1 in a week (how we know)
Month by month
- January
- high ~20 °C67 °F · low ~8 °C46 °F · rain ~59 mm2.3 in
- February
- high ~20 °C67 °F · low ~8 °C47 °F · rain ~67 mm2.6 in
- March
- high ~20 °C69 °F · low ~10 °C50 °F · rain ~41 mm1.6 in
- April
- high ~22 °C71 °F · low ~11 °C52 °F · rain ~20 mm0.8 in
- May
- high ~22 °C72 °F · low ~14 °C57 °F · rain ~7.1 mm0.3 in
- June
- high ~24 °C75 °F · low ~16 °C60 °F · rain ~1.5 mm0.06 in
- July
- high ~27 °C80 °F · low ~18 °C64 °F · rain ~1.8 mm0.07 in
- August
- high ~28 °C82 °F · low ~18 °C65 °F · rain ~0.3 mm0.01 in
- September
- high ~27 °C81 °F · low ~18 °C64 °F · rain ~4.3 mm0.2 in
- October
- high ~25 °C78 °F · low ~14 °C58 °F · rain ~14 mm0.5 in
- November
- high ~23 °C73 °F · low ~10 °C50 °F · rain ~23 mm0.9 in
- December
- high ~20 °C67 °F · low ~7 °C45 °F · rain ~41 mm1.6 in
Where these numbers come from
NOAA NCEI 1991–2020 Climate Normals, the San Diego Montgomery Field station (listed by NOAA as San Diego Montgomery Fld, USW00003131), at 32.82, -117.14. These are that station’s own records, unshifted. The further your garden is from it, the less exactly they describe your ground. The planner finds the nearest station to your garden and lowers its confidence with distance, so no number is presented as if it were measured in your garden.
Cold air also pools in low ground on the clear, still nights when frost happens, so a hollow can freeze while a slope a few hundred feet away does not. No table can know that about your garden. A few seasons of your own logged frosts can.
ZIP codes nearest this station
92037, 92101, 92103, 92104, 92105, 92106, 92107, 92108, 92109, 92110, 92111, 92115, 92116, 92117, 92120, 92121, 92122, 92123, 92124, 92126, 92131, 92134, 92140, 92147.
What can I plant here, and when? ›
Nearby stations
The nearest stations and how their last-frost dates compare. Together they show how frost varies across your area.
- Chula Vista, CA, frost is rare
- Carlsbad Palomar Airport, CA, frost is rare
- Vista, CA, frost is rare
- Elsinore, CA, last frost by January 28
- Tustin Irvine Ranch, CA, frost is rare
- Santa Ana Fire Stn, CA, frost is rare
Other stations in California.
- Anaheim, CA, frost is rare
- Avalon Catalina Airport, CA, frost is rare
- Fullerton Municipal Airport, CA, frost is rare
- Long Beach Daugherty Field, CA, frost is rare
- Torrance Airport, CA, frost is rare
- Lake Arrowhead, CA, last frost by May 5
- Hawthorne Municipal Airport, CA, frost is rare
- Los Angeles Dwtn Usc Campus, CA, frost is rare