When is the last frost in Springfield, OR?

The average last spring frost (50% probability of 32°F) in Springfield is around April 11, based on NOAA/NCEI 1991–2020 normals at the Eugene Mahlon Sweet Ap, OR station (11.4 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 Springfield?

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

What planting zone is Springfield, OR?

Springfield 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 Springfield?

In Springfield, OR the warmest month is August (avg high 80°F) and the coldest is December (avg low 36.9°F). It averages about 46″ of precipitation a year and 0.6″ of snow.

Home › Oregon › Springfield

Springfield, OR Planting Calendar & Frost Dates

USDA hardiness zone 8b · ZIP 97477 · elevation 217′ · NOAA & USDA data

Springfield 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 80°F); the coldest is December (avg low 36.9°F). It averages 46″ of precipitation a year and 0.6″ of snow, mostly mid-winter. 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 80°F

Month-by-month typical weather in Springfield

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Lookout Pt Dam, OR (16 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)	Snow (in)
January	46.9	37.1	42	6.1	0.4
February	50.3	37.8	44.1	4.6	0.2
March	54.2	39.8	47	5.1	0
April	58.5	42.5	50.5	4.8	0
May	64.9	46.7	55.8	3.5	0
June	70.8	50.7	60.8	2	0
July	79.8	54.7	67.2	0.5	0
August	80	54.5	67.3	0.6	0
September	74.2	52.2	63.2	1.6	0
October	62.8	47.2	55	3.7	0
November	52	41.5	46.7	6.4	0
December	46	36.9	41.5	7	0

What to plant when in Springfield

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 Springfield'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

Eugene, 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, 11.4 mi (confidence: medium). Monthly weather normals: Lookout Pt Dam, OR, 16 mi (confidence: medium). 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.