When is the last frost in Springfield, OH?

The average last spring frost (50% probability of 32°F) in Springfield is around April 25, based on NOAA/NCEI 1991–2020 normals at the Springfield Wtp, OH station (5.3 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, OH is around October 19, giving roughly a 175-day frost-free growing season.

What planting zone is Springfield, OH?

Springfield is in USDA plant hardiness zone 6a (average annual extreme minimum temperature -10 to -5°F), from the 2023 USDA Plant Hardiness Zone Map.

What is the weather like in Springfield?

In Springfield, OH the warmest month is July (avg high 85.5°F) and the coldest is January (avg low 16.9°F). It averages about 41.9″ of precipitation a year and 18.7″ of snow.

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Springfield, OH Planting Calendar & Frost Dates

USDA hardiness zone 6a · ZIP 45502 · elevation 266′ · NOAA & USDA data

Springfield is in USDA hardiness zone 6a (winters can dip to -10 to -5°F), with a growing season of about 175 days between the average last spring frost (April 25) and first fall frost (October 19). The warmest month is July (avg high 85.5°F); the coldest is January (avg low 16.9°F). It averages 41.9″ of precipitation a year and 18.7″ 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 -10 to -5°F

Last spring frost

April 25

avg (50% prob, 32°F)

First fall frost

October 19

avg (50% prob, 32°F)

Growing season

175 days

frost-free window

Warmest month

July

avg high 85.5°F

Month-by-month typical weather in Springfield

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at New Carlisle, OH (8.5 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)	Snow (in)
January	37.7	16.9	27.3	3.2	6.2
February	41.3	20.4	30.9	2.4	5.3
March	51.7	28.9	40.3	3.3	3
April	63.7	38.2	51	4.3	0.1
May	74.1	48.7	61.4	4.5	0
June	82.5	58.6	70.6	4.4	0
July	85.5	62.1	73.8	4.5	0
August	84.4	60	72.2	3.1	0
September	78.4	53.5	66	3.2	0
October	66.3	41.9	54.1	2.9	0
November	53.2	32.1	42.7	3.1	0.4
December	41.7	23.8	32.8	3.1	3.7

What to plant when in Springfield

Crop	Season	What to do & when
Tomatoes	warm	Start seeds indoors: March 14 · Transplant out: May 2
Peppers	warm	Start seeds indoors: February 28 · Transplant out: May 9
Cucumbers	warm	Direct sow: May 2
Zucchini / squash	warm	Direct sow: May 2
Bush beans	warm	Direct sow: May 2
Sweet corn	warm	Direct sow: May 2
Basil	warm	Transplant out: May 2
Peas	cool	Sow (spring): March 21 · Sow (fall): August 24
Spinach	cool	Sow (spring): March 14 · Sow (fall): August 24
Lettuce	cool	Sow (spring): March 28 · Sow (fall): August 24
Kale	cool	Transplant (spring): April 4 · Sow (fall): August 10
Broccoli	cool	Transplant (spring): April 11
Carrots	cool	Sow (spring): April 4 · Sow (fall): August 10
Onions	cool	Transplant (spring): March 28
Potatoes	cool	Plant seed potatoes: April 11
Radishes	cool	Sow (spring): March 28 · Sow (fall): September 7

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 Ohio

Dayton, OH Dublin, OH Middletown, OH Grove City, OH Columbus, OH Hamilton, OH Lima, OH Westerville, OH

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 — Springfield Wtp, OH, 5.3 mi (confidence: high). Monthly weather normals: New Carlisle, OH, 8.5 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.