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

Planting zone for 95947 — Greenville, CA

ZIP code 95947 (Greenville, Plumas County) is in USDA zone 7b: the coldest winter night averages 5 to 10 °F. The median last spring frost is May 18 and the first fall frost October 8.

Where ZIP 95947 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.

Zone7b5 to 10 °F
Coldest night−15 to −12.2 °C
Last frostMay 18
First frostOct 8
2012 zone7b

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 7b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Greenville, 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 Greenville, CA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 18median — 50% chance of a later frost
Safe for tender plantsJune 9only 10% chance of frost after
First fall frostOctober 8median — 10% chance by Sep 24
Growing season143 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 26 and returns around October 26.

From the NOAA station Canyon Dam, CA — 13 miles away, elevation 4,561 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 95947

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Apr 6 – Apr 20
SpinachSow outdoors · Apr 6 – Apr 27
Broccoli, cabbageStart indoors · Mar 9 – Mar 23
Broccoli, cabbageTransplant · Apr 27 – May 11
Onion setsPlant outdoors · Apr 20 – May 4
PotatoesPlant outdoors · Apr 27 – May 11
LettuceSow outdoors · Apr 20 – May 4
Carrots, beetsSow outdoors · Apr 27 – May 11
TomatoesStart indoors · Mar 23 – Apr 6
TomatoesTransplant · May 25 – Jun 8
Peppers, eggplantStart indoors · Mar 9 – Mar 23
Peppers, eggplantTransplant · Jun 1 – Jun 15
BeansSow outdoors · May 25 – Jun 8
Sweet cornSow outdoors · May 25 – Jun 8
Cucumbers, squashSow outdoors · May 25 – Jun 8
Fall lettuce, spinachSow outdoors · Aug 13 – Aug 27
GarlicPlant cloves · Sep 24 – Oct 29
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 18) and first fall frost (Oct 8) 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 95947 came on Mar 8 — 10 days earlier than the 1991–2020 average (Mar 18).

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 Greenville, CA

The soil mapped at the center of ZIP 95947 is Kinkel family — very gravelly loam, well drained.

TextureVery gravelly loama good balance for most vegetables
pH6.5neutral; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter3%moderate
Hydrologic groupCwater soaks in slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Kinkel-Deadwood families complex, 50 to 70 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 95947; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Greenville, CA

Summer high86 °Faverage high, July
Winter low25 °Faverage low, January
Hot days18days a year at 90 °F or more
Freezing nights159nights a year at 32 °F or less
Growing degree days2,062base 50 °F — the season’s usable heat
Longest day15 h 02 mindaylight on June 21
Shortest day9 h 18 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation37.1 inper year, rain and melted snow
Snowfall109 inper year; 88 days with snow on the ground

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 42 °F, low 25 °F 42°25° JanFebruary: average high 45 °F, low 26 °F 45°26° FebMarch: average high 51 °F, low 29 °F 51°29° MarApril: average high 58 °F, low 32 °F 58°32° AprMay: average high 68 °F, low 39 °F 68°39° MayJune: average high 78 °F, low 45 °F 78°45° JunJuly: average high 86 °F, low 50 °F 86°50° JulAugust: average high 85 °F, low 49 °F 85°49° AugSeptember: average high 79 °F, low 44 °F 79°44° SepOctober: average high 66 °F, low 36 °F 66°36° OctNovember: average high 50 °F, low 30 °F 50°30° NovDecember: average high 41 °F, low 25 °F 41°25° Dec

Precipitation by month inches · ❄ = snowfall

0″2″4″6″January: 6.36 in precipitation, 28.5 in snowfall 6.4❄29 JanFebruary: 6.36 in precipitation, 22.3 in snowfall 6.4❄22 FebMarch: 5.66 in precipitation, 17.1 in snowfall 5.7❄17 MarApril: 2.86 in precipitation, 7.3 in snowfall 2.9❄7 AprMay: 1.94 in precipitation, 0.5 in snowfall 1.9❄1 MayJune: 0.82 in precipitation, 0.1 in snowfall 0.8 JunJuly: 0.14 in precipitation 0.1 JulAugust: 0.17 in precipitation 0.2 AugSeptember: 0.35 in precipitation 0.3 SepOctober: 1.95 in precipitation, 0.8 in snowfall 1.9❄1 OctNovember: 3.64 in precipitation, 7.1 in snowfall 3.6❄7 NovDecember: 6.84 in precipitation, 25.6 in snowfall 6.8❄26 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Canyon Dam, CA (13 mi away); precipitation: Canyon Dam, CA (13 mi away). 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.

959347b
Crescent Mills, CA · 8 mi
959837b
Taylorsville, CA · 9 mi
959237b
Canyon Dam, CA · 16 mi
959717b
Quincy, CA · 16 mi
959848a
Twain, CA · 19 mi
961277a
Susanville, CA · 20 mi
959157b
Belden, CA · 24 mi
959568a
Meadow Valley, CA · 24 mi

California planting zones →

Questions about 95947

What planting zone is ZIP code 95947?

ZIP code 95947 (Greenville, CA) is in USDA hardiness zone 7b on the 2023 map: the coldest night of an average winter reaches 5 to 10 °F (−15 to −12.2 °C).

When is the last frost in Greenville, CA?

The median last spring frost (32 °F) near 95947 is May 18; after June 9 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Canyon Dam station.

When is the first frost in Greenville, CA?

The median first fall frost near 95947 is October 8, giving a median frost-free growing season of 143 days.

When should I plant tomatoes in 95947?

Start tomato seeds indoors around Mar 23 – Apr 6 and set transplants outside around May 25 – Jun 8, one to three weeks after the median last frost.

How much rain and snow does 95947 get?

About 37.1 inches of precipitation a year and 109 inches of snowfall (NOAA 1991–2020 normals, Canyon Dam station).

How hot do summers get in Greenville, CA?

The average high peaks at 86 °F in July, with about 18 days a year at 90 °F or more.

What kind of soil does 95947 have?

The USDA soil survey maps Kinkel family at the center of ZIP 95947: very gravelly loam, well drained, pH about 6.5 (neutral).

Did spring come early in Greenville, CA in 2026?

Spring leaf-out near 95947 came on Mar 8 in 2026, 10 days earlier than the 1991–2020 average (Mar 18), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Greenville, CA?

Long-day onions: the longest day near 95947 is 15 h 02 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).