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

Planting zone for 93730 — Fresno, CA

ZIP code 93730 (Fresno, Fresno County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F. The median last spring frost is March 9 and the first fall frost December 1.

Where ZIP 93730 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.

Zone9b25 to 30 °F
Coldest night−3.9 to −1.1 °C
Last frostMar 9
First frostDec 1
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 Fresno, 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 Fresno, CA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 9median — 50% chance of a later frost
Safe for tender plantsApril 16only 10% chance of frost after
First fall frostDecember 1median — 10% chance by Nov 12
Growing season262 daysfrost-free, median

A hard freeze (28 °F) usually ends around January 19 and returns around December 13.

From the NOAA station Friant Government Camp, CA — 7 miles away, elevation 410 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 93730

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Jan 26 – Feb 9
SpinachSow outdoors · Jan 26 – Feb 16
Broccoli, cabbageStart indoors · Dec 29 – Jan 12
Broccoli, cabbageTransplant · Feb 16 – Mar 2
Onion setsPlant outdoors · Feb 9 – Feb 23
PotatoesPlant outdoors · Feb 16 – Mar 2
LettuceSow outdoors · Feb 9 – Feb 23
Carrots, beetsSow outdoors · Feb 16 – Mar 2
TomatoesStart indoors · Jan 12 – Jan 26
TomatoesTransplant · Mar 16 – Mar 30
Peppers, eggplantStart indoors · Dec 29 – Jan 12
Peppers, eggplantTransplant · Mar 23 – Apr 6
BeansSow outdoors · Mar 16 – Mar 30
Sweet cornSow outdoors · Mar 16 – Mar 30
Cucumbers, squashSow outdoors · Mar 16 – Mar 30
Fall lettuce, spinachSow outdoors · Oct 6 – Oct 20
GarlicPlant cloves · Nov 17 – Dec 22
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 9) and first fall frost (Dec 1) 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 93730 came on Jan 30 — 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 Fresno, CA

The soil mapped at the center of ZIP 93730 is Hanford — fine sandy loam, well drained.

TextureFine 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 groupAwater soaks in fast
Farmland classPrime farmland if irrigatedUSDA classification

Map unit: Hanford fine sandy loam, silty 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 93730; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Fresno, CA

Summer high99 °Faverage high, July
Winter low37 °Faverage low, December
Hot days118days a year at 90 °F or more
Freezing nights17nights a year at 32 °F or less
Growing degree days4,957base 50 °F — the season’s usable heat
Longest day14 h 42 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
Precipitation12.7 inper year, rain and melted snow

Average high and low, by month

30°40°50°60°70°80°90°100°110°32 °FJanuary: average high 56 °F, low 38 °F 56°38° JanFebruary: average high 61 °F, low 40 °F 61°40° FebMarch: average high 66 °F, low 43 °F 66°43° MarApril: average high 73 °F, low 44 °F 73°44° AprMay: average high 83 °F, low 50 °F 83°50° MayJune: average high 92 °F, low 56 °F 92°56° JunJuly: average high 99 °F, low 62 °F 99°62° JulAugust: average high 98 °F, low 60 °F 98°60° AugSeptember: average high 92 °F, low 57 °F 92°57° SepOctober: average high 80 °F, low 50 °F 80°50° OctNovember: average high 66 °F, low 42 °F 66°42° NovDecember: average high 56 °F, low 37 °F 56°37° Dec

Precipitation by month inches

0″1″2″3″January: 2.62 in precipitation 2.6 JanFebruary: 2.12 in precipitation 2.1 FebMarch: 2.22 in precipitation 2.2 MarApril: 1.08 in precipitation 1.1 AprMay: 0.50 in precipitation 0.5 MayJune: 0.18 in precipitation 0.2 JunJuly: 0.04 in precipitation 0.0 JulAugust: 0.01 in precipitation 0.0 AugSeptember: 0.09 in precipitation 0.1 SepOctober: 0.63 in precipitation 0.6 OctNovember: 0.98 in precipitation 1.0 NovDecember: 2.21 in precipitation 2.2 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Friant Government Camp, CA (7 mi away); precipitation: Fresno 7.2 Nne, CA (2 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 9b.

937209b
Fresno, CA · 3 mi
936509b
Fresno, CA · 5 mi
937109b
Fresno, CA · 6 mi
936139b
Clovis, CA · 6 mi
937409b
Fresno, CA · 6 mi
937119b
Fresno, CA · 7 mi
936129b
Clovis, CA · 7 mi
936119b
Clovis, CA · 7 mi

All 57 ZIP codes in Fresno → · California planting zones →

Questions about 93730

What planting zone is ZIP code 93730?

ZIP code 93730 (Fresno, 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 Fresno, CA?

The median last spring frost (32 °F) near 93730 is March 9; after April 16 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Friant Government Camp station.

When is the first frost in Fresno, CA?

The median first fall frost near 93730 is December 1, giving a median frost-free growing season of 262 days.

When should I plant tomatoes in 93730?

Start tomato seeds indoors around Jan 12 – Jan 26 and set transplants outside around Mar 16 – Mar 30, one to three weeks after the median last frost.

How much rain and snow does 93730 get?

About 12.7 inches of precipitation a year (NOAA 1991–2020 normals, Fresno 7.2 Nne station).

How hot do summers get in Fresno, CA?

The average high peaks at 99 °F in July, with about 118 days a year at 90 °F or more.

What kind of soil does 93730 have?

The USDA soil survey maps Hanford at the center of ZIP 93730: fine sandy loam, well drained, pH about 6.7 (neutral).

Did spring come early in Fresno, CA in 2026?

Spring leaf-out near 93730 came on Jan 30 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 Fresno, CA?

Intermediate onions: the longest day near 93730 is 14 h 42 min, so day-neutral types bulb best; long-day varieties may not bulb fully.