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USDA Hardiness Zone 4b

Frost Dates for 54114 — Crivitz, Wisconsin

NOAA 1991–2020 normals from Crivitz High Falls, WI (950 ft), 8 miles north.

Updated

In Crivitz, the last spring frost (32°F) is around May 26 in half of years and has passed by June 11 in nine years out of ten. The first fall frost comes around September 22, as early as September 6 one year in ten, leaving a typical freeze-free season of 118 days (NOAA, Crivitz High Falls, WI).

Last spring frost
May 26

50% probability

First fall frost
September 22

50% probability

Growing season
118 days

freeze-free, 50%

Hardiness zone
4b

-25 to -20°F (-31.7 to -28.9°C) coldest night

First snow
November 11

median, 1991–2020

Last snow
April 13

median, 1991–2020

Winters with snow
100%

28 of 28 observed

Snow per year
58.3"

NOAA normal

Frost risk by date in Crivitz

Half of springs at Crivitz High Falls, WI see their last 32°F night by May 26; only one in ten is past it by May 11, and one in ten still has one after June 11. Planting tender crops after June 1 leaves a 30% risk of a frost on them, after June 4 20%, and after June 11 10%. The 16 days between the even-odds date and the one-in-ten date is wider than at 70% of the 182 Wisconsin stations behind this site's ZIP pages.

In fall the first 32°F night comes by September 22 in half of years, as early as September 6 one year in ten, and holds off past October 5 one year in ten. A hard freeze of 28°F follows 11 days later, around October 3; in spring the one-in-ten date for 28°F is May 28, 14 days before the 32°F one. The freeze-free season lasts 118 days in a typical year, shorter than at 99% of the 182 Wisconsin stations; it reaches 138 days one year in ten and falls short of 97 one year in ten. On average 194 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 13 days longer, to about June 8, and return around September 11. Severe cold of 16°F or below comes every winter, usually between November 10 and April 12.

Spring: the chance of another night this cold after the date
Low90%80%70%60%50%40%30%20%10%
36°FMay 24May 29Jun 1Jun 5Jun 8Jun 12Jun 16Jun 23Jun 30
32°FMay 11May 17May 21May 24May 26May 30Jun 1Jun 4Jun 11
28°FApr 30May 4May 8May 11May 14May 18May 21May 24May 28
24°FApr 20Apr 25Apr 28Apr 30May 2May 5May 8May 12May 17
20°FApr 10Apr 14Apr 17Apr 21Apr 24Apr 26Apr 29May 1May 6
16°FMar 29Apr 3Apr 6Apr 8Apr 12Apr 14Apr 18Apr 22Apr 26
Fall: the chance the first night this cold has come by the date
Low10%20%30%40%50%60%70%80%90%
36°FAug 26Sep 1Sep 4Sep 8Sep 11Sep 13Sep 16Sep 19Sep 24
32°FSep 6Sep 13Sep 17Sep 20Sep 22Sep 25Sep 28Oct 1Oct 5
28°FSep 19Sep 24Sep 28Oct 1Oct 3Oct 5Oct 8Oct 12Oct 16
24°FOct 1Oct 5Oct 9Oct 12Oct 14Oct 17Oct 20Oct 23Oct 29
20°FOct 14Oct 19Oct 23Oct 26Oct 30Nov 1Nov 3Nov 7Nov 13
16°FOct 28Nov 1Nov 3Nov 6Nov 10Nov 12Nov 15Nov 19Nov 23

Freeze probabilities 1991–2020 at Crivitz High Falls, WI, from NOAA NCEI U.S. Climate Normals. Where a temperature is reached in fewer than 99.5% of years, the dates describe only the years that reach it. Not a forecast.

Frost risk on any date in 54114 →Compare Crivitz with another place →

Weather by month in Crivitz

July is the warmest month at Crivitz High Falls, WI, averaging 79°F by day and 54°F at night; January is the coldest at 23°F and 4°F. A freezing night is all but certain in every month from October to May (a 90% chance or more). From July to August the chance of a 32°F night stays under 10% each month. In spring, June still brings one in 32% of years.

Warmth for growing adds up to 1,842 growing degree days a year (base 50°F), fewer than at 93% of the 182 Wisconsin stations. 31% of them (570) have built up by the end of June, and July adds the most, 522. Precipitation totals 32.1 inches a year, most in June (3.9") and least in February (1.3"); May to September bring 55% of it.

Monthly normals 1991–2020 at Crivitz High Falls, WI
MonthHigh °FLow °FPrecip. in32°F nightNights ≤ 32°FGDD 50°F
Jan2341.4100%310
Feb2851.3100%280
Mar39161.9100%282
Apr52273.0100%2221
May66403.299%8166
Jun75503.932%1382
Jul79543.70%0522
Aug78533.23%0476
Sep69443.776%3230
Oct55332.8100%1741
Nov40222.2100%262
Dec28111.8100%300

Monthly normals 1991–2020 at Crivitz High Falls, WI (950 ft), NOAA NCEI. "32°F night": chance of at least one in the month. GDD: growing degree days, base 50°F.

Compared with the next station

The nearest other station, Suring, WI, 21 miles southwest of Crivitz and 158 feet lower, has a last frost 12 days earlier (May 14), a first frost 9 days later (October 1), a season 21 days longer.

Frost dates for 54124 (Gillett) →

When it snows in Crivitz, Wisconsin

The first measurable snow (0.1 inch or more) in Crivitz usually arrives around November 11, and the last of the season around April 13. Those are the middle dates across the winters of 1991–2020 at Crivitz High Falls, WI, 8.1 miles away: half of years saw snow earlier, half later. Every one of those winters saw snow. The last 32°F night of spring typically comes 43 days after the last snow.

Planting calendar for 54114

What to do and when, from the 50% frost dates for Crivitz, Wisconsin
WhenWhat to do
March 17 – March 31Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out.
March 31 – April 14Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early.
April 28 – May 12Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil.
May 26 onwardTransplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast.
by June 30Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops.
by September 8Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation.
September 22 onwardPlant garlic, mulch beds, lift tender bulbsGarlic wants a cold spell; bare soil loses structure over winter.

The weeks before and after the 50% dates are general rules of thumb, not NOAA figures; a seed packet gives the timing for each variety.

Where these figures come from

ZIP 54114 is 8 miles from Crivitz High Falls, WI, which stands at 950 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 54114 in zone 4b, the band where the coldest night of the year averaged -25 to -20°F (-31.7 to -28.9°C) over 1991–2020; a zone describes winter lows, not frost dates.

Frost dates across Wisconsin →

Hardiness zone and temperature range: USDA Plant Hardiness Zone Map 2023 (USDA-ARS, Oregon State University), ZIP-code listing, unchanged. °C converted from °F by this site.

Thirty-year averages, not a forecast: check the forecast before planting out. How stations are matched and which pages are offered to search engines: methodology.

Other zone 4b places in Wisconsin