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

Planting zone for 95903 — Beale Afb, CA

ZIP code 95903 (Beale Afb, Yuba County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F. The median last spring frost is February 11 and the first fall frost November 30.

Where ZIP 95903 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 frostFeb 11
First frostNov 30
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 Beale Afb, 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 Beale Afb, CA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostFebruary 11median — 50% chance of a later frost
Safe for tender plantsMarch 12only 10% chance of frost after
First fall frostNovember 30median — 10% chance by Nov 12
Growing season289 daysfrost-free, median

A hard freeze (28 °F) usually ends around January 12 and returns around December 13.

From the NOAA station Marysville Yuba Co. Airport, CA — 11 miles away, elevation 62 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 95903

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Dec 31 – Jan 14
SpinachSow outdoors · Dec 31 – Jan 21
Broccoli, cabbageStart indoors · Dec 3 – Dec 17
Broccoli, cabbageTransplant · Jan 21 – Feb 4
Onion setsPlant outdoors · Jan 14 – Jan 28
PotatoesPlant outdoors · Jan 21 – Feb 4
LettuceSow outdoors · Jan 14 – Jan 28
Carrots, beetsSow outdoors · Jan 21 – Feb 4
TomatoesStart indoors · Dec 17 – Dec 31
TomatoesTransplant · Feb 18 – Mar 4
Peppers, eggplantStart indoors · Dec 3 – Dec 17
Peppers, eggplantTransplant · Feb 25 – Mar 11
BeansSow outdoors · Feb 18 – Mar 4
Sweet cornSow outdoors · Feb 18 – Mar 4
Cucumbers, squashSow outdoors · Feb 18 – Mar 4
Fall lettuce, spinachSow outdoors · Oct 5 – Oct 19
GarlicPlant cloves · Nov 16 – Dec 21
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Feb 11) and first fall frost (Nov 30) 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 95903 came on Jan 31 — about the same time as the 1991–2020 average (Feb 1).

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 Beale Afb, CA

The soil mapped at the center of ZIP 95903 is Pardee — gravelly loam, well drained.

TextureGravelly loama good balance for most vegetables
pH5.8moderately acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1.5%low — add compost
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Pardee-Ranchoseco complex, 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 95903; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Beale Afb, CA

Summer high96 °Faverage high, July
Winter low38 °Faverage low, January
Hot days99days a year at 90 °F or more
Freezing nights23nights a year at 32 °F or less
Growing degree days4,773base 50 °F — the season’s usable heat
Longest day14 h 55 mindaylight on June 21
Shortest day9 h 25 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation34.8 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 60 °F, low 41 °F 60°41° FebMarch: average high 66 °F, low 43 °F 66°43° MarApril: average high 73 °F, low 46 °F 73°46° AprMay: average high 82 °F, low 52 °F 82°52° MayJune: average high 90 °F, low 58 °F 90°58° JunJuly: average high 96 °F, low 61 °F 96°61° JulAugust: average high 95 °F, low 60 °F 95°60° AugSeptember: average high 90 °F, low 56 °F 90°56° SepOctober: average high 79 °F, low 49 °F 79°49° OctNovember: average high 64 °F, low 41 °F 64°41° NovDecember: average high 55 °F, low 38 °F 55°38° Dec

Precipitation by month inches

0″2″4″6″January: 5.95 in precipitation 6.0 JanFebruary: 6.10 in precipitation 6.1 FebMarch: 5.46 in precipitation 5.5 MarApril: 2.70 in precipitation 2.7 AprMay: 1.50 in precipitation 1.5 MayJune: 0.52 in precipitation 0.5 JunJuly: 0.00 in precipitation 0.0 JulAugust: 0.08 in precipitation 0.1 AugSeptember: 0.24 in precipitation 0.2 SepOctober: 1.78 in precipitation 1.8 OctNovember: 3.68 in precipitation 3.7 NovDecember: 6.78 in precipitation 6.8 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Marysville Yuba Co. Airport, CA (11 mi away); precipitation: Harry L Englebright Dam, CA (10 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 9b.

959779b
Smartsville, CA · 6 mi
956929b
Wheatland, CA · 6 mi
956819b
Sheridan, CA · 9 mi
959019b
Marysville, CA · 10 mi
959469b
Penn Valley, CA · 10 mi
959619b
Olivehurst, CA · 12 mi
959189b
Browns Valley, CA · 13 mi
959499b
Grass Valley, CA · 13 mi

California planting zones →

Questions about 95903

What planting zone is ZIP code 95903?

ZIP code 95903 (Beale Afb, 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 Beale Afb, CA?

The median last spring frost (32 °F) near 95903 is February 11; after March 12 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Marysville Yuba Co. Airport station.

When is the first frost in Beale Afb, CA?

The median first fall frost near 95903 is November 30, giving a median frost-free growing season of 289 days.

When should I plant tomatoes in 95903?

Start tomato seeds indoors around Dec 17 – Dec 31 and set transplants outside around Feb 18 – Mar 4, one to three weeks after the median last frost.

How much rain and snow does 95903 get?

About 34.8 inches of precipitation a year (NOAA 1991–2020 normals, Harry L Englebright Dam station).

How hot do summers get in Beale Afb, CA?

The average high peaks at 96 °F in July, with about 99 days a year at 90 °F or more.

What kind of soil does 95903 have?

The USDA soil survey maps Pardee at the center of ZIP 95903: gravelly loam, well drained, pH about 5.8 (moderately acidic).

Did spring come early in Beale Afb, CA in 2026?

Spring leaf-out near 95903 came on Jan 31 in 2026, about the same as the 1991–2020 average (Feb 1), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Beale Afb, CA?

Intermediate onions: the longest day near 95903 is 14 h 55 min, so day-neutral types bulb best; long-day varieties may not bulb fully.