When is the last frost in Sheboygan, WI?

The average last spring frost (50% probability of 32°F) in Sheboygan is around April 25, based on NOAA/NCEI 1991–2020 normals at the Sheboygan, WI station (5.1 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 Sheboygan?

The average first fall frost in Sheboygan, WI is around October 23, giving roughly a 179-day frost-free growing season.

What planting zone is Sheboygan, WI?

Sheboygan is in USDA plant hardiness zone 5b (average annual extreme minimum temperature -15 to -10°F), from the 2023 USDA Plant Hardiness Zone Map.

What is the weather like in Sheboygan?

In Sheboygan, WI the warmest month is July (avg high 81.9°F) and the coldest is January (avg low 14.7°F). It averages about 34.7″ of precipitation a year.

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Sheboygan, WI Planting Calendar & Frost Dates

USDA hardiness zone 5b · ZIP 53083 · elevation 198′ · NOAA & USDA data

Sheboygan is in USDA hardiness zone 5b (winters can dip to -15 to -10°F), with a growing season of about 179 days between the average last spring frost (April 25) and first fall frost (October 23). The warmest month is July (avg high 81.9°F); the coldest is January (avg low 14.7°F). It averages 34.7″ 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 -10°F

Last spring frost

April 25

avg (50% prob, 32°F)

First fall frost

October 23

avg (50% prob, 32°F)

Growing season

179 days

frost-free window

Warmest month

July

avg high 81.9°F

Month-by-month typical weather in Sheboygan

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Sheboygan, WI (5.1 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)	Snow (in)
January	30.3	14.7	22.5	2.1	–
February	33.3	17.3	25.3	1.7	–
March	42.2	26.2	34.2	2.1	–
April	52.2	35.8	44	3.6	–
May	63.2	46	54.6	3.7	–
June	74.3	55.9	65.1	4	–
July	81.9	62.6	72.3	3.2	–
August	80.1	61.9	71	4	–
September	72.4	55	63.7	2.7	–
October	59.3	42.4	50.9	3.2	–
November	46.5	31.1	38.8	2.4	–
December	35.6	21.5	28.5	2.1	–

What to plant when in Sheboygan

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 28
Spinach	cool	Sow (spring): March 14 · Sow (fall): August 28
Lettuce	cool	Sow (spring): March 28 · Sow (fall): August 28
Kale	cool	Transplant (spring): April 4 · Sow (fall): August 14
Broccoli	cool	Transplant (spring): April 11
Carrots	cool	Sow (spring): April 4 · Sow (fall): August 14
Onions	cool	Transplant (spring): March 28
Potatoes	cool	Plant seed potatoes: April 11
Radishes	cool	Sow (spring): March 28 · Sow (fall): September 11

Dates are computed from Sheboygan'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 Wisconsin

Fond Du Lac, WI Oshkosh, WI Appleton, WI Green Bay, WI Milwaukee, WI Brookfield, WI Waukesha, WI New Berlin, WI

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 — Sheboygan, WI, 5.1 mi (confidence: high). Monthly weather normals: Sheboygan, WI, 5.1 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.