When is the last frost in Eugene, OR?

The average last spring frost (50% probability of 32°F) in Eugene is around April 11, based on NOAA/NCEI 1991–2020 normals at the Eugene Mahlon Sweet Ap, OR station (8.1 mi away). Half of years it falls outside that date, so wait 1–2 weeks past it before setting out frost-tender plants.

When is the first fall frost in Eugene?

The average first fall frost in Eugene, OR is around October 23, giving roughly a 196-day frost-free growing season.

What planting zone is Eugene, OR?

Eugene is in USDA plant hardiness zone 8b (average annual extreme minimum temperature 15 to 20°F), from the 2023 USDA Plant Hardiness Zone Map.

What is the weather like in Eugene?

In Eugene, OR the warmest month is August (avg high 84.3°F) and the coldest is December (avg low 34.3°F). It averages about 40.8″ of precipitation a year.

Home › Oregon › Eugene

Eugene, OR Planting Calendar & Frost Dates

USDA hardiness zone 8b · ZIP 97401 · elevation 108′ · NOAA & USDA data

Eugene is in USDA hardiness zone 8b (winters can dip to 15 to 20°F), with a growing season of about 196 days between the average last spring frost (April 11) and first fall frost (October 23). The warmest month is August (avg high 84.3°F); the coldest is December (avg low 34.3°F). It averages 40.8″ of precipitation a year. Start cool-season crops several weeks before the last frost; wait until after it for tomatoes, peppers and other tender crops.

Hardiness zone

min temp 15 to 20°F

Last spring frost

April 11

avg (50% prob, 32°F)

First fall frost

October 23

avg (50% prob, 32°F)

Growing season

196 days

frost-free window

Warmest month

August

avg high 84.3°F

Month-by-month typical weather in Eugene

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Eugene Mahlon Sweet Ap, OR (8.1 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)	Snow (in)
January	48.1	34.7	41.4	6.1	–
February	51.5	35	43.3	4.7	–
March	56.6	37.2	46.9	4.6	–
April	61.3	40	50.7	3.3	–
May	68.1	44	56.1	2.5	–
June	74.2	47.6	60.9	1.2	–
July	84	51.7	67.8	0.3	–
August	84.3	51.5	67.9	0.4	–
September	78	47.8	62.9	1.4	–
October	64.9	41.8	53.4	3.2	–
November	53.2	37.7	45.5	6	–
December	46.8	34.3	40.6	7.2	–

What to plant when in Eugene

Crop	Season	What to do & when
Tomatoes	warm	Start seeds indoors: February 28 · Transplant out: April 18
Peppers	warm	Start seeds indoors: February 14 · Transplant out: April 25
Cucumbers	warm	Direct sow: April 18
Zucchini / squash	warm	Direct sow: April 18
Bush beans	warm	Direct sow: April 18
Sweet corn	warm	Direct sow: April 18
Basil	warm	Transplant out: April 18
Peas	cool	Sow (spring): March 7 · Sow (fall): August 28
Spinach	cool	Sow (spring): February 28 · Sow (fall): August 28
Lettuce	cool	Sow (spring): March 14 · Sow (fall): August 28
Kale	cool	Transplant (spring): March 21 · Sow (fall): August 14
Broccoli	cool	Transplant (spring): March 28
Carrots	cool	Sow (spring): March 21 · Sow (fall): August 14
Onions	cool	Transplant (spring): March 14
Potatoes	cool	Plant seed potatoes: March 28
Radishes	cool	Sow (spring): March 14 · Sow (fall): September 11

Dates are computed from Eugene's average frost dates using standard cool-/warm-season timing. They're a starting point — a cold spring, a warm microclimate, or a fast-maturing variety can shift them by a week or two.

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Gear that helps you plant on time

Some links below are Amazon affiliate links (tag theboringthin-20). If you buy through them we may earn a small commission at no extra cost to you — it keeps this almanac free. We only list generic, genuinely-useful categories.

Soil thermometer →Know when the ground is warm enough to sow — the honest signal, not the calendar.Seed-starting trays + dome →Start tomatoes & peppers indoors on the schedule below.Seedling heat mat →Warms the soil for faster, more even germination indoors.Floating row cover / frost cloth →Buys you 4–8°F to beat an early or late frost.Raised garden bed kit →Warms and drains faster in spring than in-ground soil.Garden gloves →Basic kit for transplant day.

Nearby cities in Oregon

Springfield, OR Corvallis, OR Albany, OR Salem, OR Bend, OR Lake Oswego, OR Hillsboro, OR Beaverton, OR

Sources & method. Hardiness zone: 2023 USDA Plant Hardiness Zone Map (PRISM Climate Group, Oregon State University). Frost dates & growing season: NOAA/NCEI 1991–2020 U.S. Climate Normals, nearest station with published freeze normals — Eugene Mahlon Sweet Ap, OR, 8.1 mi (confidence: high). Monthly weather normals: Eugene Mahlon Sweet Ap, OR, 8.1 mi (confidence: high). ZIP centroid from U.S. Census 2023 ZCTA data. Frost dates are the 50%-probability date — half of years frost occurs outside the stated date. Nothing here is invented; where the nearest station is far, we say so. Last updated 2026-07-22.