Planting zone for 93276 — Tupman, CA
ZIP code 93276 (Tupman, Kern County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F. The median last spring frost is February 9 and the first fall frost November 26.
Where ZIP 93276 is
Outlined: the ZIP code area · tap the map for the zone at any spot · scroll or pinch to zoomNot 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.
Was 9a 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 9b means →
Frost forecast — next 7 nights
live from the National Weather ServiceLoading the forecast for Tupman, 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 Tupman, CA
A hard freeze (28 °F) usually ends around January 11 and returns around December 8.
From the NOAA station Buttonwillow, CA — 7 miles away, elevation 226 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 93276
Counted from the median last spring frost (Feb 9) and first fall frost (Nov 26) 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 93276 came on Jan 30 — about the same time as the 1991–2020 average (Jan 30).
Jan 302026
Jan 30
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 Tupman, CA
The soil mapped at the center of ZIP 93276 is Granoso — loamy sand, somewhat excessively drained.
Map unit: Granoso loamy sand, 2 to 5 percent 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 93276; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.
Climate in Tupman, CA
Average high and low, by month
Precipitation by month inches
NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Buttonwillow, CA (7 mi away); precipitation: Buttonwillow, CA (7 mi away). Daylight is calculated from latitude.
Nearby ZIP codes
2 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.
Questions about 93276
What planting zone is ZIP code 93276?
ZIP code 93276 (Tupman, CA) is in USDA hardiness zone 9b on the 2023 map: the coldest night of an average winter reaches 25 to 30 °F (−3.9 to −1.1 °C).
When is the last frost in Tupman, CA?
The median last spring frost (32 °F) near 93276 is February 9; after March 6 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Buttonwillow station.
When is the first frost in Tupman, CA?
The median first fall frost near 93276 is November 26, giving a median frost-free growing season of 289 days.
When should I plant tomatoes in 93276?
Start tomato seeds indoors around Dec 15 – Dec 29 and set transplants outside around Feb 16 – Mar 2, one to three weeks after the median last frost.
How much rain and snow does 93276 get?
About 6 inches of precipitation a year (NOAA 1991–2020 normals, Buttonwillow station).
How hot do summers get in Tupman, CA?
The average high peaks at 98 °F in July, with about 115 days a year at 90 °F or more.
What kind of soil does 93276 have?
The USDA soil survey maps Granoso at the center of ZIP 93276: loamy sand, somewhat excessively drained, pH about 8.0 (alkaline).
Did spring come early in Tupman, CA in 2026?
Spring leaf-out near 93276 came on Jan 30 in 2026, about the same as the 1991–2020 average (Jan 30), according to the USA National Phenology Network Spring Index.
What kind of onions grow in Tupman, CA?
Intermediate onions: the longest day near 93276 is 14 h 33 min, so day-neutral types bulb best; long-day varieties may not bulb fully.
Did the zone for 93276 change?
Yes. The 2012 USDA map put 93276 in zone 9a; the 2023 map puts it in zone 9b. The newer map uses 1991–2020 data and more weather stations.