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

Planting zone for 93649 — Piedra, CA

ZIP code 93649 (Piedra, Fresno County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F. The median last spring frost is February 23 and the first fall frost December 12.

Where ZIP 93649 is

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.

Zone9b25 to 30 °F
Coldest night−3.9 to −1.1 °C
Last frostFeb 23
First frostDec 12
2012 zone9b

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 9b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Piedra, 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 Piedra, CA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostFebruary 23median — 50% chance of a later frost
Safe for tender plantsApril 4only 10% chance of frost after
First fall frostDecember 12median — 10% chance by Nov 25
Growing season294 daysfrost-free, median

A hard freeze (28 °F) usually ends around January 21 and returns around December 27.

From the NOAA station Balch Pwr House, CA — 15 miles away, elevation 1,736 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 93649

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Jan 12 – Jan 26
SpinachSow outdoors · Jan 12 – Feb 2
Broccoli, cabbageStart indoors · Dec 15 – Dec 29
Broccoli, cabbageTransplant · Feb 2 – Feb 16
Onion setsPlant outdoors · Jan 26 – Feb 9
PotatoesPlant outdoors · Feb 2 – Feb 16
LettuceSow outdoors · Jan 26 – Feb 9
Carrots, beetsSow outdoors · Feb 2 – Feb 16
TomatoesStart indoors · Dec 29 – Jan 12
TomatoesTransplant · Mar 2 – Mar 16
Peppers, eggplantStart indoors · Dec 15 – Dec 29
Peppers, eggplantTransplant · Mar 9 – Mar 23
BeansSow outdoors · Mar 2 – Mar 16
Sweet cornSow outdoors · Mar 2 – Mar 16
Cucumbers, squashSow outdoors · Mar 2 – Mar 16
Fall lettuce, spinachSow outdoors · Oct 17 – Oct 31
GarlicPlant cloves · Nov 28 – Jan 2
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Feb 23) and first fall frost (Dec 12) 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 93649 came on Jan 29 — about the same time as the 1991–2020 average (Jan 31).

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 Piedra, CA

The soil mapped at the center of ZIP 93649 is Vista — coarse sandy loam, well drained.

TextureCoarse sandy loamdrains and warms fast; dries out and needs more feeding
pH6.7neutral; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter0.75%low — add compost
Hydrologic groupBwater soaks in moderately
Farmland classNot prime farmlandUSDA classification

Map unit: Vista coarse sandy loam, 15 to 30 percent slopes, moist, MLRA 18.

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 93649; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Piedra, CA

Summer high93 °Faverage high, July
Winter low38 °Faverage low, December
Hot days90days a year at 90 °F or more
Freezing nights15nights a year at 32 °F or less
Growing degree days4,923base 50 °F — the season’s usable heat
Longest day14 h 41 mindaylight on June 21
Shortest day9 h 38 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation19.6 inper year, rain and melted snow

Average high and low, by month

30°40°50°60°70°80°90°100°32 °FJanuary: average high 52 °F, low 39 °F 52°39° JanFebruary: average high 56 °F, low 40 °F 56°40° FebMarch: average high 63 °F, low 43 °F 63°43° MarApril: average high 68 °F, low 47 °F 68°47° AprMay: average high 77 °F, low 54 °F 77°54° MayJune: average high 85 °F, low 61 °F 85°61° JunJuly: average high 93 °F, low 69 °F 93°69° JulAugust: average high 93 °F, low 69 °F 93°69° AugSeptember: average high 88 °F, low 64 °F 88°64° SepOctober: average high 77 °F, low 54 °F 77°54° OctNovember: average high 60 °F, low 45 °F 60°45° NovDecember: average high 51 °F, low 38 °F 51°38° Dec

Precipitation by month inches

0″1″2″3″4″January: 3.90 in precipitation 3.9 JanFebruary: 3.54 in precipitation 3.5 FebMarch: 3.44 in precipitation 3.4 MarApril: 1.63 in precipitation 1.6 AprMay: 0.84 in precipitation 0.8 MayJune: 0.29 in precipitation 0.3 JunJuly: 0.03 in precipitation 0.0 JulAugust: 0.00 in precipitation 0.0 AugSeptember: 0.13 in precipitation 0.1 SepOctober: 0.99 in precipitation 1.0 OctNovember: 1.43 in precipitation 1.4 NovDecember: 3.34 in precipitation 3.3 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Balch Pwr House, CA (15 mi away); precipitation: Pine Flat Dam, CA (2 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

936579b
Sanger, CA · 6 mi
936679a
Tollhouse, CA · 9 mi
936759a
Yokuts, CA · 12 mi
936549b
Reedley, CA · 13 mi
936519a
Prather, CA · 14 mi
936199b
Clovis, CA · 14 mi
936469b
Orange Cove, CA · 15 mi
936219a
Dunlap, CA · 15 mi

California planting zones →

Questions about 93649

What planting zone is ZIP code 93649?

ZIP code 93649 (Piedra, 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 Piedra, CA?

The median last spring frost (32 °F) near 93649 is February 23; after April 4 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Balch Pwr House station.

When is the first frost in Piedra, CA?

The median first fall frost near 93649 is December 12, giving a median frost-free growing season of 294 days.

When should I plant tomatoes in 93649?

Start tomato seeds indoors around Dec 29 – Jan 12 and set transplants outside around Mar 2 – Mar 16, one to three weeks after the median last frost.

How much rain and snow does 93649 get?

About 19.6 inches of precipitation a year (NOAA 1991–2020 normals, Pine Flat Dam station).

How hot do summers get in Piedra, CA?

The average high peaks at 93 °F in July, with about 90 days a year at 90 °F or more.

What kind of soil does 93649 have?

The USDA soil survey maps Vista at the center of ZIP 93649: coarse sandy loam, well drained, pH about 6.7 (neutral).

Did spring come early in Piedra, CA in 2026?

Spring leaf-out near 93649 came on Jan 29 in 2026, about the same as the 1991–2020 average (Jan 31), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Piedra, CA?

Intermediate onions: the longest day near 93649 is 14 h 41 min, so day-neutral types bulb best; long-day varieties may not bulb fully.