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

Planting zone for 93639 — Madera, CA

ZIP code 93639 (Madera, Madera County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F. The median last spring frost is February 18 and the first fall frost November 27.

Where ZIP 93639 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 18
First frostNov 27
2012 zone9a

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 Service

Loading the forecast for Madera, 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 Madera, CA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostFebruary 18median — 50% chance of a later frost
Safe for tender plantsMarch 18only 10% chance of frost after
First fall frostNovember 27median — 10% chance by Nov 10
Growing season281 daysfrost-free, median

A hard freeze (28 °F) usually ends around January 21 and returns around December 10.

From the NOAA station Madera, CA — within 1 mile, elevation 269 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 93639

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Jan 7 – Jan 21
SpinachSow outdoors · Jan 7 – Jan 28
Broccoli, cabbageStart indoors · Dec 10 – Dec 24
Broccoli, cabbageTransplant · Jan 28 – Feb 11
Onion setsPlant outdoors · Jan 21 – Feb 4
PotatoesPlant outdoors · Jan 28 – Feb 11
LettuceSow outdoors · Jan 21 – Feb 4
Carrots, beetsSow outdoors · Jan 28 – Feb 11
TomatoesStart indoors · Dec 24 – Jan 7
TomatoesTransplant · Feb 25 – Mar 11
Peppers, eggplantStart indoors · Dec 10 – Dec 24
Peppers, eggplantTransplant · Mar 4 – Mar 18
BeansSow outdoors · Feb 25 – Mar 11
Sweet cornSow outdoors · Feb 25 – Mar 11
Cucumbers, squashSow outdoors · Feb 25 – Mar 11
Fall lettuce, spinachSow outdoors · Oct 2 – Oct 16
GarlicPlant cloves · Nov 13 – Dec 18
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Feb 18) and first fall frost (Nov 27) 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 93639 came on Jan 30 — 3 days earlier than the 1991–2020 average (Feb 2).

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 Madera, CA

The soil mapped at the center of ZIP 93639 is Tujunga — loamy sand, somewhat excessively drained.

TextureLoamy sanddrains and warms fast; dries out and needs more feeding
pH7.0neutral; most vegetables like 6.0–7.0
DrainageSomewhat excessively drainednatural drainage class
Organic matter0.75%low — add compost
Hydrologic groupAwater soaks in fast
Farmland classFarmland of statewide importanceUSDA classification

Map unit: Tujunga loamy sand, 0 to 3 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 93639; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Madera, CA

Summer high96 °Faverage high, July
Winter low36 °Faverage low, December
Hot days100days a year at 90 °F or more
Freezing nights26nights a year at 32 °F or less
Growing degree days4,942base 50 °F — the season’s usable heat
Longest day14 h 42 mindaylight on June 21
Shortest day9 h 37 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation11.3 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 55 °F, low 38 °F 55°38° JanFebruary: average high 61 °F, low 40 °F 61°40° FebMarch: average high 67 °F, low 44 °F 67°44° MarApril: average high 73 °F, low 47 °F 73°47° AprMay: average high 82 °F, low 53 °F 82°53° MayJune: average high 90 °F, low 59 °F 90°59° JunJuly: average high 96 °F, low 64 °F 96°64° JulAugust: average high 95 °F, low 63 °F 95°63° AugSeptember: average high 89 °F, low 58 °F 89°58° SepOctober: average high 78 °F, low 49 °F 78°49° OctNovember: average high 64 °F, low 41 °F 64°41° NovDecember: average high 55 °F, low 36 °F 55°36° Dec

Precipitation by month inches

0″1″2″3″January: 2.14 in precipitation 2.1 JanFebruary: 2.09 in precipitation 2.1 FebMarch: 1.82 in precipitation 1.8 MarApril: 0.96 in precipitation 1.0 AprMay: 0.47 in precipitation 0.5 MayJune: 0.20 in precipitation 0.2 JunJuly: 0.00 in precipitation 0.0 JulAugust: 0.00 in precipitation 0.0 AugSeptember: 0.07 in precipitation 0.1 SepOctober: 0.60 in precipitation 0.6 OctNovember: 1.01 in precipitation 1.0 NovDecember: 1.89 in precipitation 1.9 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Madera, CA (within 1 mile); precipitation: Madera, 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.

936389b
Madera, CA · 6 mi
936379a
Madera, CA · 8 mi
936369b
Madera, CA · 10 mi
936069a
Biola, CA · 12 mi
937239b
Fresno, CA · 13 mi
937229b
Fresno, CA · 15 mi
937119b
Fresno, CA · 15 mi
936109a
Chowchilla, CA · 15 mi

All 4 ZIP codes in Madera → · California planting zones →

Questions about 93639

What planting zone is ZIP code 93639?

ZIP code 93639 (Madera, 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 Madera, CA?

The median last spring frost (32 °F) near 93639 is February 18; after March 18 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Madera station.

When is the first frost in Madera, CA?

The median first fall frost near 93639 is November 27, giving a median frost-free growing season of 281 days.

When should I plant tomatoes in 93639?

Start tomato seeds indoors around Dec 24 – Jan 7 and set transplants outside around Feb 25 – Mar 11, one to three weeks after the median last frost.

How much rain and snow does 93639 get?

About 11.3 inches of precipitation a year (NOAA 1991–2020 normals, Madera station).

How hot do summers get in Madera, CA?

The average high peaks at 96 °F in July, with about 100 days a year at 90 °F or more.

What kind of soil does 93639 have?

The USDA soil survey maps Tujunga at the center of ZIP 93639: loamy sand, somewhat excessively drained, pH about 7.0 (neutral).

Did spring come early in Madera, CA in 2026?

Spring leaf-out near 93639 came on Jan 30 in 2026, 3 days earlier than the 1991–2020 average (Feb 2), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Madera, CA?

Intermediate onions: the longest day near 93639 is 14 h 42 min, so day-neutral types bulb best; long-day varieties may not bulb fully.

Did the zone for 93639 change?

Yes. The 2012 USDA map put 93639 in zone 9a; the 2023 map puts it in zone 9b. The newer map uses 1991–2020 data and more weather stations.