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

Planting zone for 97486 — Umpqua, OR

ZIP code 97486 (Umpqua, Douglas County) is in USDA zone 9a: the coldest winter night averages 20 to 25 °F. The median last spring frost is March 31 and the first fall frost November 5.

Where ZIP 97486 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.

Zone9a20 to 25 °F
Coldest night−6.7 to −3.9 °C
Last frostMar 31
First frostNov 5
2012 zone8b

Was 8b 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 9a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Umpqua, OR…

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 Umpqua, OR

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 31median — 50% chance of a later frost
Safe for tender plantsApril 26only 10% chance of frost after
First fall frostNovember 5median — 10% chance by Oct 16
Growing season215 daysfrost-free, median

A hard freeze (28 °F) usually ends around February 26 and returns around December 1.

From the NOAA station Winchester, OR — 10 miles away, elevation 459 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 97486

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 17 – Mar 3
SpinachSow outdoors · Feb 17 – Mar 10
Broccoli, cabbageStart indoors · Jan 20 – Feb 3
Broccoli, cabbageTransplant · Mar 10 – Mar 24
Onion setsPlant outdoors · Mar 3 – Mar 17
PotatoesPlant outdoors · Mar 10 – Mar 24
LettuceSow outdoors · Mar 3 – Mar 17
Carrots, beetsSow outdoors · Mar 10 – Mar 24
TomatoesStart indoors · Feb 3 – Feb 17
TomatoesTransplant · Apr 7 – Apr 21
Peppers, eggplantStart indoors · Jan 20 – Feb 3
Peppers, eggplantTransplant · Apr 14 – Apr 28
BeansSow outdoors · Apr 7 – Apr 21
Sweet cornSow outdoors · Apr 7 – Apr 21
Cucumbers, squashSow outdoors · Apr 7 – Apr 21
Fall lettuce, spinachSow outdoors · Sep 10 – Sep 24
GarlicPlant cloves · Oct 22 – Nov 26
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 31) and first fall frost (Nov 5) 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 97486 came on Feb 15 — about the same time as the 1991–2020 average (Feb 17).

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 Umpqua, OR

The soil mapped at the center of ZIP 97486 is Oakland — silt loam, well drained.

TextureSilt 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 groupCwater soaks in slowly
Farmland classFarmland of statewide importanceUSDA classification

Map unit: Oakland silt loam, 12 to 20 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 97486; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Umpqua, OR

Summer high86 °Faverage high, July
Winter low35 °Faverage low, January
Hot days25days a year at 90 °F or more
Freezing nights38nights a year at 32 °F or less
Growing degree days2,741base 50 °F — the season’s usable heat
Longest day15 h 24 mindaylight on June 21
Shortest day8 h 58 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation42.9 inper year, rain and melted snow

Average high and low, by month

20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 50 °F, low 35 °F 50°35° JanFebruary: average high 54 °F, low 35 °F 54°35° FebMarch: average high 59 °F, low 37 °F 59°37° MarApril: average high 64 °F, low 40 °F 64°40° AprMay: average high 71 °F, low 45 °F 71°45° MayJune: average high 77 °F, low 50 °F 77°50° JunJuly: average high 86 °F, low 55 °F 86°55° JulAugust: average high 86 °F, low 54 °F 86°54° AugSeptember: average high 81 °F, low 49 °F 81°49° SepOctober: average high 68 °F, low 43 °F 68°43° OctNovember: average high 56 °F, low 38 °F 56°38° NovDecember: average high 49 °F, low 35 °F 49°35° Dec

Precipitation by month inches

0″2″4″6″8″January: 6.28 in precipitation 6.3 JanFebruary: 4.74 in precipitation 4.7 FebMarch: 5.02 in precipitation 5.0 MarApril: 3.70 in precipitation 3.7 AprMay: 2.31 in precipitation 2.3 MayJune: 1.26 in precipitation 1.3 JunJuly: 0.35 in precipitation 0.3 JulAugust: 0.35 in precipitation 0.3 AugSeptember: 1.18 in precipitation 1.2 SepOctober: 3.36 in precipitation 3.4 OctNovember: 6.35 in precipitation 6.3 NovDecember: 8.00 in precipitation 8.0 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Winchester, OR (10 mi away); precipitation: Oakland 4.5 W, OR (9 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.

974719a
Roseburg, OR · 9 mi
974948b
Wilbur, OR · 10 mi
974628b
Oakland, OR · 11 mi
974958b
Winchester, OR · 12 mi
974819a
Tenmile, OR · 16 mi
974969a
Winston, OR · 20 mi
974369a
Elkton, OR · 20 mi
974169a
Camas Valley, OR · 23 mi

Oregon planting zones →

Questions about 97486

What planting zone is ZIP code 97486?

ZIP code 97486 (Umpqua, OR) is in USDA hardiness zone 9a on the 2023 map: the coldest night of an average winter reaches 20 to 25 °F (−6.7 to −3.9 °C).

When is the last frost in Umpqua, OR?

The median last spring frost (32 °F) near 97486 is March 31; after April 26 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Winchester station.

When is the first frost in Umpqua, OR?

The median first fall frost near 97486 is November 5, giving a median frost-free growing season of 215 days.

When should I plant tomatoes in 97486?

Start tomato seeds indoors around Feb 3 – Feb 17 and set transplants outside around Apr 7 – Apr 21, one to three weeks after the median last frost.

How much rain and snow does 97486 get?

About 42.9 inches of precipitation a year (NOAA 1991–2020 normals, Oakland 4.5 W station).

How hot do summers get in Umpqua, OR?

The average high peaks at 86 °F in July, with about 25 days a year at 90 °F or more.

What kind of soil does 97486 have?

The USDA soil survey maps Oakland at the center of ZIP 97486: silt loam, well drained, pH about 6.1 (slightly acidic).

Did spring come early in Umpqua, OR in 2026?

Spring leaf-out near 97486 came on Feb 15 in 2026, about the same as the 1991–2020 average (Feb 17), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Umpqua, OR?

Long-day onions: the longest day near 97486 is 15 h 24 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 97486 change?

Yes. The 2012 USDA map put 97486 in zone 8b; the 2023 map puts it in zone 9a. The newer map uses 1991–2020 data and more weather stations.