Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated

Planting zone for 95233 — Hathaway Pines, CA

ZIP code 95233 (Hathaway Pines, Calaveras County) is in USDA zone 8b: the coldest winter night averages 15 to 20 °F. The median last spring frost is May 7 and the first fall frost October 28.

Where ZIP 95233 is

Outlined: the ZIP code area · tap the map for the zone at any spot · scroll or pinch to zoom

Not the official USDA Plant Hardiness Zone Map. Zones come from the 2023 USDA hardiness-zone data by the PRISM Group, Oregon State University; we re-mapped and recolored them. The official map is at planthardiness.ars.usda.gov.

Zone8b15 to 20 °F
Coldest night−9.4 to −6.7 °C
Last frostMay 7
First frostOct 28
2012 zone8b

Same zone as on the 2012 map. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 8b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Hathaway Pines, CA…

Forecast data: National Weather Service (api.weather.gov), public domain. This is not a warning service — for official frost and freeze warnings see weather.gov.

Frost dates in Hathaway Pines, CA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 7median — 50% chance of a later frost
Safe for tender plantsMay 31only 10% chance of frost after
First fall frostOctober 28median — 10% chance by Oct 5
Growing season169 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 18 and returns around November 14.

From the NOAA station Calaveras Big Trees, CA — 7 miles away, elevation 4,695 ft. NOAA NCEI U.S. Climate Normals 1991–2020, 32 °F threshold. Low spots and valleys can freeze later in spring than the station.

When to plant vegetables in 95233

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 26 – Apr 9
SpinachSow outdoors · Mar 26 – Apr 16
Broccoli, cabbageStart indoors · Feb 26 – Mar 12
Broccoli, cabbageTransplant · Apr 16 – Apr 30
Onion setsPlant outdoors · Apr 9 – Apr 23
PotatoesPlant outdoors · Apr 16 – Apr 30
LettuceSow outdoors · Apr 9 – Apr 23
Carrots, beetsSow outdoors · Apr 16 – Apr 30
TomatoesStart indoors · Mar 12 – Mar 26
TomatoesTransplant · May 14 – May 28
Peppers, eggplantStart indoors · Feb 26 – Mar 12
Peppers, eggplantTransplant · May 21 – Jun 4
BeansSow outdoors · May 14 – May 28
Sweet cornSow outdoors · May 14 – May 28
Cucumbers, squashSow outdoors · May 14 – May 28
Fall lettuce, spinachSow outdoors · Sep 2 – Sep 16
GarlicPlant cloves · Oct 14 – Nov 18
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 7) and first fall frost (Oct 28) with the rules of thumb U.S. extension services publish. Cool-season crops take a light frost; warm-season crops do best once the soil is above about 60 °F.

When spring arrived in 2026

In 2026, spring leaf-out near 95233 came on Jan 29 — 12 days earlier than the 1991–2020 average (Feb 10).

JanFebMarAprMayJun

The Spring Index marks the day when accumulated warmth is enough for lilac and honeysuckle to leaf out — a widely used signal that the growing season has started. Source: USA National Phenology Network, www.usanpn.org — Spring Indices, first leaf, 2026 (data as of 2026-09-08) and 30-year average 1991–2020 (CC BY 4.0).

Soil in Hathaway Pines, CA

The soil mapped at the center of ZIP 95233 is Josephine family — gravelly loam, well drained.

TextureGravelly loama good balance for most vegetables
pH6.0slightly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter4.5%moderate
Hydrologic groupBwater soaks in moderately
Farmland classNot prime farmlandUSDA classification

Map unit: Josephine family, deep-Moderately deep complex, 5 to 35 slopes.

Soil Survey Staff, Natural Resources Conservation Service, USDA. Soil Survey Geographic (SSURGO) Database, via Soil Data Access, accessed 2026-10-29. The soil at the center point of ZIP 95233; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Hathaway Pines, CA

Summer high81 °Faverage high, July
Winter low30 °Faverage low, January
Hot days2days a year at 90 °F or more
Freezing nights115nights a year at 32 °F or less
Growing degree days2,183base 50 °F — the season’s usable heat
Longest day14 h 49 mindaylight on June 21
Shortest day9 h 30 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation55.5 inper year, rain and melted snow
Snowfall105 inper year

Average high and low, by month

20°30°40°50°60°70°80°90°32 °FJanuary: average high 45 °F, low 30 °F 45°30° JanFebruary: average high 46 °F, low 30 °F 46°30° FebMarch: average high 49 °F, low 32 °F 49°32° MarApril: average high 54 °F, low 35 °F 54°35° AprMay: average high 63 °F, low 42 °F 63°42° MayJune: average high 73 °F, low 49 °F 73°49° JunJuly: average high 81 °F, low 56 °F 81°56° JulAugust: average high 80 °F, low 55 °F 80°55° AugSeptember: average high 74 °F, low 51 °F 74°51° SepOctober: average high 64 °F, low 43 °F 64°43° OctNovember: average high 52 °F, low 34 °F 52°34° NovDecember: average high 44 °F, low 30 °F 44°30° Dec

Precipitation by month inches · ❄ = snowfall

0″2″4″6″8″10″January: 10.57 in precipitation, 19.3 in snowfall 10.6❄19 JanFebruary: 9.82 in precipitation, 25.9 in snowfall 9.8❄26 FebMarch: 8.48 in precipitation, 19.2 in snowfall 8.5❄19 MarApril: 4.59 in precipitation, 11.4 in snowfall 4.6❄11 AprMay: 2.79 in precipitation, 2.2 in snowfall 2.8❄2 MayJune: 0.95 in precipitation, 0.1 in snowfall 0.9 JunJuly: 0.11 in precipitation 0.1 JulAugust: 0.06 in precipitation 0.1 AugSeptember: 0.39 in precipitation 0.4 SepOctober: 2.93 in precipitation, 0.3 in snowfall 2.9 OctNovember: 5.17 in precipitation, 7.7 in snowfall 5.2❄8 NovDecember: 9.65 in precipitation, 18.7 in snowfall 9.7❄19 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Calaveras Big Trees, CA (7 mi away); precipitation: Calaveras Big Trees, CA (7 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

6 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.

952248b
Avery, CA · 4 mi
952479a
Murphys, CA · 5 mi
952299a
Douglas Flat, CA · 7 mi
953109a
Columbia, CA · 7 mi
952469a
Mountain Ranch, CA · 8 mi
952519a
Vallecito, CA · 9 mi
953838b
Twain Harte, CA · 10 mi
952489a
Rail Road Flat, CA · 10 mi

California planting zones →

Questions about 95233

What planting zone is ZIP code 95233?

ZIP code 95233 (Hathaway Pines, CA) is in USDA hardiness zone 8b on the 2023 map: the coldest night of an average winter reaches 15 to 20 °F (−9.4 to −6.7 °C).

When is the last frost in Hathaway Pines, CA?

The median last spring frost (32 °F) near 95233 is May 7; after May 31 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Calaveras Big Trees station.

When is the first frost in Hathaway Pines, CA?

The median first fall frost near 95233 is October 28, giving a median frost-free growing season of 169 days.

When should I plant tomatoes in 95233?

Start tomato seeds indoors around Mar 12 – Mar 26 and set transplants outside around May 14 – May 28, one to three weeks after the median last frost.

How much rain and snow does 95233 get?

About 55.5 inches of precipitation a year and 105 inches of snowfall (NOAA 1991–2020 normals, Calaveras Big Trees station).

How hot do summers get in Hathaway Pines, CA?

The average high peaks at 81 °F in July, with about 2 days a year at 90 °F or more.

What kind of soil does 95233 have?

The USDA soil survey maps Josephine family at the center of ZIP 95233: gravelly loam, well drained, pH about 6.0 (slightly acidic).

Did spring come early in Hathaway Pines, CA in 2026?

Spring leaf-out near 95233 came on Jan 29 in 2026, 12 days earlier than the 1991–2020 average (Feb 10), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Hathaway Pines, CA?

Intermediate onions: the longest day near 95233 is 14 h 49 min, so day-neutral types bulb best; long-day varieties may not bulb fully.