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

Planting zone for 95225 — Burson, CA

ZIP code 95225 (Burson, Calaveras County) is in USDA zone 9b: the coldest winter night averages 25 to 30 °F.

Where ZIP 95225 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 frostrare
First frostrare
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 Burson, 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

A 32 °F frost doesn't happen here in most winters. At the nearest station (NOAA station Camp Pardee, CA — 3 miles away, elevation 659 ft) the median growing season is 332 days. When frost does come, it is a midwinter night or two; cover tender plants when a freeze is forecast.

Frost data: NOAA NCEI U.S. Climate Normals 1991–2020.

When spring arrived in 2026

In 2026, spring leaf-out near 95225 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 Burson, CA

The soil mapped at the center of ZIP 95225 is Copperopolis — channery loam, well drained.

TextureChannery loama good balance for most vegetables
pH6.1slightly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter3.5%moderate
Hydrologic groupDwater soaks in very slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Copperopolis-Whiterock complex, 15 to 30 percent slopes, rocky.

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 95225; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Burson, CA

Summer high95 °Faverage high, July
Winter low40 °Faverage low, January
Hot days87days a year at 90 °F or more
Freezing nights7nights a year at 32 °F or less
Growing degree days4,910base 50 °F — the season’s usable heat
Longest day14 h 49 mindaylight on June 21
Shortest day9 h 30 mindaylight on December 21
Onions to growIntermediateday-neutral types bulb best; long-day varieties may not bulb fully
Precipitation22.9 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 40 °F 55°40° JanFebruary: average high 59 °F, low 43 °F 59°43° FebMarch: average high 64 °F, low 45 °F 64°45° MarApril: average high 69 °F, low 48 °F 69°48° AprMay: average high 79 °F, low 53 °F 79°53° MayJune: average high 88 °F, low 59 °F 88°59° JunJuly: average high 95 °F, low 63 °F 95°63° JulAugust: average high 94 °F, low 63 °F 94°63° AugSeptember: average high 88 °F, low 61 °F 88°61° SepOctober: average high 78 °F, low 54 °F 78°54° OctNovember: average high 64 °F, low 46 °F 64°46° NovDecember: average high 55 °F, low 40 °F 55°40° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 3.99 in precipitation 4.0 JanFebruary: 3.84 in precipitation 3.8 FebMarch: 3.63 in precipitation 3.6 MarApril: 2.15 in precipitation 2.1 AprMay: 1.28 in precipitation 1.3 MayJune: 0.33 in precipitation 0.3 JunJuly: 0.00 in precipitation 0.0 JulAugust: 0.03 in precipitation 0.0 AugSeptember: 0.17 in precipitation 0.2 SepOctober: 1.13 in precipitation 1.1 OctNovember: 2.16 in precipitation 2.2 NovDecember: 4.15 in precipitation 4.2 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Camp Pardee, CA (3 mi away); precipitation: Camp Pardee, CA (3 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

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

952269b
Campo Seco, CA · 2 mi
952529b
Valley Springs, CA · 3 mi
952549b
Wallace, CA · 5 mi
952279b
Clements, CA · 10 mi
956409b
Ione, CA · 10 mi
956429b
Jackson, CA · 11 mi
956549b
Martell, CA · 11 mi
952499a
San Andreas, CA · 13 mi

California planting zones →

Questions about 95225

What planting zone is ZIP code 95225?

ZIP code 95225 (Burson, 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).

How much rain and snow does 95225 get?

About 22.9 inches of precipitation a year (NOAA 1991–2020 normals, Camp Pardee station).

How hot do summers get in Burson, CA?

The average high peaks at 95 °F in July, with about 87 days a year at 90 °F or more.

What kind of soil does 95225 have?

The USDA soil survey maps Copperopolis at the center of ZIP 95225: channery loam, well drained, pH about 6.1 (slightly acidic).

Did spring come early in Burson, CA in 2026?

Spring leaf-out near 95225 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 Burson, CA?

Intermediate onions: the longest day near 95225 is 14 h 49 min, so day-neutral types bulb best; long-day varieties may not bulb fully.