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

Planting zone for 97137 — Saint Paul, OR

ZIP code 97137 (Saint Paul, Marion County) is in USDA zone 8b: the coldest winter night averages 15 to 20 °F. The median last spring frost is March 21 and the first fall frost November 22.

Where ZIP 97137 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.

Zone8b15 to 20 °F
Coldest night−9.4 to −6.7 °C
Last frostMar 21
First frostNov 22
2012 zone8b

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 8b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Saint Paul, 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 Saint Paul, OR

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMarch 21median — 50% chance of a later frost
Safe for tender plantsApril 19only 10% chance of frost after
First fall frostNovember 22median — 10% chance by Nov 4
Growing season241 daysfrost-free, median

A hard freeze (28 °F) usually ends around February 15 and returns around December 10.

From the NOAA station Rex 1 S, OR — 6 miles away, elevation 515 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 97137

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Feb 7 – Feb 21
SpinachSow outdoors · Feb 7 – Feb 28
Broccoli, cabbageStart indoors · Jan 10 – Jan 24
Broccoli, cabbageTransplant · Feb 28 – Mar 14
Onion setsPlant outdoors · Feb 21 – Mar 7
PotatoesPlant outdoors · Feb 28 – Mar 14
LettuceSow outdoors · Feb 21 – Mar 7
Carrots, beetsSow outdoors · Feb 28 – Mar 14
TomatoesStart indoors · Jan 24 – Feb 7
TomatoesTransplant · Mar 28 – Apr 11
Peppers, eggplantStart indoors · Jan 10 – Jan 24
Peppers, eggplantTransplant · Apr 4 – Apr 18
BeansSow outdoors · Mar 28 – Apr 11
Sweet cornSow outdoors · Mar 28 – Apr 11
Cucumbers, squashSow outdoors · Mar 28 – Apr 11
Fall lettuce, spinachSow outdoors · Sep 27 – Oct 11
GarlicPlant cloves · Nov 8 – Dec 13
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Mar 21) and first fall frost (Nov 22) 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 97137 came on Feb 22 — 5 days later than 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 Saint Paul, OR

The soil mapped at the center of ZIP 97137 is Concord — silt loam, poorly drained.

TextureSilt loama good balance for most vegetables
pH6.1slightly acidic; most vegetables like 6.0–7.0
DrainagePoorly drainedconsider raised beds
Organic matter3%moderate
Hydrologic groupC/Dslow when drained; wet otherwise
Farmland classPrime farmland if drainedUSDA classification

Map unit: Concord silt loam.

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 97137; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Saint Paul, OR

Summer high81 °Faverage high, July
Winter low34 °Faverage low, December
Hot days15days a year at 90 °F or more
Freezing nights43nights a year at 32 °F or less
Growing degree days2,381base 50 °F — the season’s usable heat
Longest day15 h 39 mindaylight on June 21
Shortest day8 h 44 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation44.2 inper year, rain and melted snow
Snowfall1 inper year

Average high and low, by month

20°30°40°50°60°70°80°90°32 °FJanuary: average high 45 °F, low 35 °F 45°35° JanFebruary: average high 50 °F, low 36 °F 50°36° FebMarch: average high 55 °F, low 38 °F 55°38° MarApril: average high 61 °F, low 41 °F 61°41° AprMay: average high 66 °F, low 47 °F 66°47° MayJune: average high 72 °F, low 51 °F 72°51° JunJuly: average high 81 °F, low 56 °F 81°56° JulAugust: average high 81 °F, low 56 °F 81°56° AugSeptember: average high 75 °F, low 52 °F 75°52° SepOctober: average high 62 °F, low 45 °F 62°45° OctNovember: average high 51 °F, low 39 °F 51°39° NovDecember: average high 44 °F, low 34 °F 44°34° Dec

Precipitation by month inches · ❄ = snowfall

0″2″4″6″8″January: 6.38 in precipitation, 0.6 in snowfall 6.4❄1 JanFebruary: 4.56 in precipitation, 0.1 in snowfall 4.6 FebMarch: 4.77 in precipitation, 0.2 in snowfall 4.8 MarApril: 3.56 in precipitation 3.6 AprMay: 2.57 in precipitation 2.6 MayJune: 1.58 in precipitation 1.6 JunJuly: 0.43 in precipitation 0.4 JulAugust: 0.55 in precipitation 0.6 AugSeptember: 1.63 in precipitation 1.6 SepOctober: 4.17 in precipitation 4.2 OctNovember: 6.65 in precipitation 6.7 NovDecember: 7.37 in precipitation, 0.1 in snowfall 7.4 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Rex 1 S, OR (6 mi away); precipitation: Rex 1 S, OR (6 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 8b.

970208b
Donald, OR · 5 mi
971158b
Dundee, OR · 6 mi
971148b
Dayton, OR · 7 mi
971328b
Newberg, OR · 7 mi
970028b
Aurora, OR · 8 mi
970268b
Gervais, OR · 8 mi
971278b
Lafayette, OR · 8 mi
970718b
Woodburn, OR · 8 mi

Oregon planting zones →

Questions about 97137

What planting zone is ZIP code 97137?

ZIP code 97137 (Saint Paul, OR) is in USDA hardiness zone 8b on the 2023 map: the coldest night of an average winter reaches 15 to 20 °F (−9.4 to −6.7 °C).

When is the last frost in Saint Paul, OR?

The median last spring frost (32 °F) near 97137 is March 21; after April 19 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Rex 1 S station.

When is the first frost in Saint Paul, OR?

The median first fall frost near 97137 is November 22, giving a median frost-free growing season of 241 days.

When should I plant tomatoes in 97137?

Start tomato seeds indoors around Jan 24 – Feb 7 and set transplants outside around Mar 28 – Apr 11, one to three weeks after the median last frost.

How much rain and snow does 97137 get?

About 44.2 inches of precipitation a year and 1 inches of snowfall (NOAA 1991–2020 normals, Rex 1 S station).

How hot do summers get in Saint Paul, OR?

The average high peaks at 81 °F in July, with about 15 days a year at 90 °F or more.

What kind of soil does 97137 have?

The USDA soil survey maps Concord at the center of ZIP 97137: silt loam, poorly drained, pH about 6.1 (slightly acidic).

Did spring come early in Saint Paul, OR in 2026?

Spring leaf-out near 97137 came on Feb 22 in 2026, 5 days later than the 1991–2020 average (Feb 17), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Saint Paul, OR?

Long-day onions: the longest day near 97137 is 15 h 39 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).