Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated Oct 29, 2026

Planting zone for 96067 — Mount Shasta, CA

ZIP code 96067 (Mount Shasta, Siskiyou County) is in USDA zone 8a: the coldest winter night averages 10 to 15 °F. The median last spring frost is May 15 and the first fall frost October 6.

Where ZIP 96067 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.

Zone8a10 to 15 °F

Coldest night−12.2 to −9.4 °C

Last frostMay 15

First frostOct 6

2012 zone7b

Was 7b on the 2012 map — half a zone warmer now. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 8a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Mount Shasta, 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 Mount Shasta, CA

JanFebMarAprMayJunJulAugSepOctNovDec

Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free

Last spring frostMay 15median — 50% chance of a later frost

Safe for tender plantsJune 5only 10% chance of frost after

First fall frostOctober 6median — 10% chance by Sep 20

Growing season143 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 29 and returns around October 25.

From the NOAA station Mt Shasta, CA — within 1 mile, elevation 3,612 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 96067

JanFebMarAprMayJunJulAugSepOctNovDec

PeasSow outdoors · Apr 3 – Apr 17

SpinachSow outdoors · Apr 3 – Apr 24

Broccoli, cabbageStart indoors · Mar 6 – Mar 20

Broccoli, cabbageTransplant · Apr 24 – May 8

Onion setsPlant outdoors · Apr 17 – May 1

PotatoesPlant outdoors · Apr 24 – May 8

LettuceSow outdoors · Apr 17 – May 1

Carrots, beetsSow outdoors · Apr 24 – May 8

TomatoesStart indoors · Mar 20 – Apr 3

TomatoesTransplant · May 22 – Jun 5

Peppers, eggplantStart indoors · Mar 6 – Mar 20

Peppers, eggplantTransplant · May 29 – Jun 12

BeansSow outdoors · May 22 – Jun 5

Sweet cornSow outdoors · May 22 – Jun 5

Cucumbers, squashSow outdoors · May 22 – Jun 5

Fall lettuce, spinachSow outdoors · Aug 11 – Aug 25

GarlicPlant cloves · Sep 22 – Oct 27

Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 15) and first fall frost (Oct 6) 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 96067 came on Feb 28 — 17 days earlier than the 1991–2020 average (Mar 17).

average
Mar 172026
Feb 28

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 Mount Shasta, CA

The soil mapped at the center of ZIP 96067 is Diyou — loam, somewhat poorly drained.

TextureLoama good balance for most vegetables

pH7.2neutral; most vegetables like 6.0–7.0

DrainageSomewhat poorly drainedconsider raised beds

Organic matter3.5%moderate

Hydrologic groupCwater soaks in slowly

Farmland classNot prime farmlandUSDA classification

Map unit: Diyou loam, peat substratum.

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 96067; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Mount Shasta, CA

Summer high85 °Faverage high, July

Winter low27 °Faverage low, January

Hot days23days a year at 90 °F or more

Freezing nights134nights a year at 32 °F or less

Growing degree days2,092base 50 °F — the season’s usable heat

Longest day15 h 10 mindaylight on June 21

Shortest day9 h 11 mindaylight on December 21

Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)

Precipitation42.6 inper year, rain and melted snow

Snowfall89 inper year; 48 days with snow on the ground

Average high and low, by month

Precipitation by month inches · ❄ = snowfall

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Mt Shasta, CA (within 1 mile); precipitation: Mt Shasta, CA (within 1 mile). Daylight is calculated from latitude.

Nearby ZIP codes

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

California planting zones →

Questions about 96067

What planting zone is ZIP code 96067?

ZIP code 96067 (Mount Shasta, CA) is in USDA hardiness zone 8a on the 2023 map: the coldest night of an average winter reaches 10 to 15 °F (−12.2 to −9.4 °C).

When is the last frost in Mount Shasta, CA?

The median last spring frost (32 °F) near 96067 is May 15; after June 5 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Mt Shasta station.

When is the first frost in Mount Shasta, CA?

The median first fall frost near 96067 is October 6, giving a median frost-free growing season of 143 days.

When should I plant tomatoes in 96067?

Start tomato seeds indoors around Mar 20 – Apr 3 and set transplants outside around May 22 – Jun 5, one to three weeks after the median last frost.

How much rain and snow does 96067 get?

About 42.6 inches of precipitation a year and 89 inches of snowfall (NOAA 1991–2020 normals, Mt Shasta station).

How hot do summers get in Mount Shasta, CA?

The average high peaks at 85 °F in July, with about 23 days a year at 90 °F or more.

What kind of soil does 96067 have?

The USDA soil survey maps Diyou at the center of ZIP 96067: loam, somewhat poorly drained, pH about 7.2 (neutral).

Did spring come early in Mount Shasta, CA in 2026?

Spring leaf-out near 96067 came on Feb 28 in 2026, 17 days earlier than the 1991–2020 average (Mar 17), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Mount Shasta, CA?

Long-day onions: the longest day near 96067 is 15 h 10 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 96067 change?

Yes. The 2012 USDA map put 96067 in zone 7b; the 2023 map puts it in zone 8a. The newer map uses 1991–2020 data and more weather stations.