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Wisconsin · county maple atlas

Maple sugaring in Sheboygan County, Wisconsin

Sheboygan County had 10 maple operations and 10,136 taps in the 2022 Census. Around Sheboygan, sap usually runs from March 17 to April 3. Here's the long-run pattern, 36 seasons of sap weather, and the outlook this week.
Too early to tapAbout 162 days until the usual start.
Sap starts
Mar 17
typical year
Season ends
Apr 3
about 2 weeks
Sap days / season
22.7
1991–2026 average
Taps, 2022
10,136
#19 of 60 in WI

Sap-flow outlook at Sheboygan right now

Full Wisconsin forecast →

Forecast for Sheboygan, WI

Updated Oct 6, 10:31 AM EDT

Off-season for now. Sap needs freezing nights, and none are in sight. Sheboygan County's season usually opens around March 17, which is 162 days away.

No freeze-thaw days in the forecast

freeze thaw 32°F

  1. WedOct 7
    57° / 69°

    0h below · 24h above

    No refreeze forecast
  2. ThuOct 8
    45° / 63°

    0h below · 24h above

    No refreeze forecast
  3. FriOct 9
    43° / 64°

    0h below · 24h above

    No refreeze forecast
  4. SatOct 10
    51° / 70°

    0h below · 24h above

    No refreeze forecast
  5. SunOct 11
    57° / 72°

    0h below · 24h above

    No refreeze forecast
  6. MonOct 12
    55° / 65°
    No refreeze forecast

Data: National Weather Service. Verdicts use freeze-thaw thresholds from maple field research; your woods may run a little differently.

When the sap runs

The sugaring calendar at Sheboygan

Freeze-thaw weather at Sheboygan peaks in the weeks of Feb 23 to Apr 6, which hold about 45% of a season's sap days. March is the busiest month.
Typical season: Mar 17 – Apr 30246Week of Dec 1: 1.1 sap days on averageWeek of Dec 8: 1.3 sap days on averageWeek of Dec 15: 1.3 sap days on averageWeek of Dec 22: 1.2 sap days on averageWeek of Dec 29: 0.9 sap days on averageWeek of Jan 5: 0.9 sap days on averageWeek of Jan 12: 0.8 sap days on averageWeek of Jan 19: 0.5 sap days on averageWeek of Jan 26: 0.9 sap days on averageWeek of Feb 2: 0.7 sap days on averageWeek of Feb 9: 0.9 sap days on averageWeek of Feb 16: 1.0 sap days on averageWeek of Feb 23: 1.3 sap days on averageWeek of Mar 2: 1.5 sap days on averageWeek of Mar 9: 1.6 sap days on averageWeek of Mar 16: 1.7 sap days on averageWeek of Mar 23: 1.8 sap days on averageWeek of Mar 30: 1.3 sap days on averageWeek of Apr 6: 1.1 sap days on averageWeek of Apr 13: 0.6 sap days on averageWeek of Apr 20: 0.4 sap days on averageWeek of Apr 27: 0.2 sap days on averageWeek of May 4: 0.0 sap days on averageWeek of May 11: 0.1 sap days on averageWeek of May 18: 0.0 sap days on averageWeek of May 25: 0.0 sap days on averageDecJanFebMarAprMaytaps in ~Mar 17
Average number of freeze-thaw sap days in each week of the season at Sheboygan, 1991–2026. A sap day is an overnight low under 30.2 °F followed by an afternoon high over 37.4 °F. The shaded band is the typical season.

Year-to-year spread

Opening signal
Median Mar 14; the middle half of seasons fell between Mar 6 and Mar 19. Earliest Feb 12 (2012), latest Mar 28 (2020).
Closing signal
Median Apr 6; middle half between Mar 31 and Apr 16. Earliest Mar 11 (2012), latest Apr 29 (2018).
Sap days by month
Dec23%Jan15%Feb17%Mar31%Apr13%May1%

36 seasons of sap weather

Sheboygan County seasons, 1991–2026

The best sap year at Sheboygan was 2020 with 40 freeze-thaw days; the leanest was 1998 with 8. Seasons that start early tend to end early too: the trees run on the swing between freezing nights and mild days, and heat ends it.
JanFebMarAprMaysap days20262026: Feb 23 – Mar 29, 27 sap days2720252025: Feb 28 – Apr 1, 33 sap days3320242024: Feb 20 – Mar 25, 23 sap days2320232023: Mar 14 – Apr 18, 37 sap days3720222022: Mar 28 – Apr 28, 29 sap days2920212021: Mar 7 – Apr 2, 34 sap days3420202020: Mar 28 – Apr 23, 40 sap days4020192019: Mar 16 – Apr 15, 24 sap days2420182018: Mar 27 – Apr 29, 35 sap days3520172017: Feb 25 – Mar 23, 17 sap days1720162016: Mar 21 – Apr 7, 22 sap days2220152015: Mar 9 – Apr 4, 12 sap days1220142014: Mar 21 – Apr 16, 16 sap days1620132013: Mar 22 – Apr 21, 24 sap days2420122012: Feb 12 – Mar 11, 35 sap days3520112011: Mar 18 – Apr 5, 12 sap days1220102010: Mar 5 – Mar 30, 14 sap days1420092009: Mar 15 – Apr 13, 28 sap days2820082008: Mar 25 – Apr 3, 16 sap days1620072007: Feb 20 – Mar 21, 21 sap days2120062006: Mar 7 – Apr 9, 20 sap days2020052005: Mar 24 – Mar 27, 18 sap days1820042004: Mar 7 – Apr 6, 24 sap days2420032003: Mar 11 – Apr 10, 18 sap days1820022002: Mar 10 – Apr 7, 29 sap days2920012001: Mar 15 – Apr 17, 14 sap days1420002119991999: Mar 13 – Mar 28, 23 sap days2319981998: Feb 23 – Mar 23, 8 sap days819971997: Mar 16 – Apr 18, 21 sap days2119961996: Mar 18 – Apr 18, 27 sap days2719951995: Mar 12 – Apr 10, 19 sap days1919941994: Mar 14 – Apr 7, 21 sap days2119931993: Mar 19 – Apr 3, 17 sap days1719921992: Mar 15 – Apr 6, 19 sap days1919911991: Mar 2 – Mar 31, 18 sap days18
Each bar runs from the season's opening signal to its closing signal, estimated from daily temperatures at Sheboygan. Dashed lines mark the typical dates. The right column counts freeze-thaw sap days from December through May.

Maple production

Sheboygan County in the Census of Agriculture

USDA counts maple operations every five years. In Sheboygan County the 2022 Census found 10 farms making syrup (-29% since 2017), with taps +33% and syrup output null over the same five years. That works out to about 0.27 gallons of syrup per tap in 2022. Among the 385 counties in this atlas, Sheboygan County ranks 138 by taps.

Sheboygan County maple production, 2017 and 2022 (USDA Census of Agriculture)
Census yearFarmsTapsGallons of syrupGal / tap
20221010,1362,7670.27
2017147,602withheld—

“Withheld” means USDA suppressed the figure to avoid disclosing data for individual operations; the farm count is still published.

Nearby

Neighboring maple counties

Distances are between reference towns; typical dates are each county's own estimate.

About these numbers

The season dates are estimated from 36 seasons of daily high and low temperatures for the PRISM 4-km grid cell at Sheboygan (594ft), scored with the same freeze-thaw rule as our live forecast: a sap day is an overnight low under 30.2 °F followed by an afternoon high over 37.4 °F. Each season's closing signal is the last sap day before accumulated warmth reaches a threshold, and the opening signal sits five weeks before that, never earlier than the first real freeze-thaw week. Tested against 117 state-seasons of USDA-reported dates, the rule lands within 5.5 days of the reported close and 6.6 days of the reported opening on average, and the typical dates shown here are scaled to Wisconsin's USDA record (12 years). Production figures are copied from the Census as published. Full method, calibration tables and the downloadable dataset →

Sources · 6

  1. 1.2022 Census of Agriculture, County Level Data — Wisconsin, Table 37: Maple Syrup, 2022 and 2017 · USDA National Agricultural Statistics Service
  2. 2.PRISM daily temperature grids (AN81d, 4 km), accessed 2026-10-05 · PRISM Group, Oregon State University, https://prism.oregonstate.edu
  3. 3.Applied Climate Information System (ACIS) web services · NOAA Regional Climate Centers
  4. 4.USDA NASS maple syrup reports — approximate average season opened and closed dates, 2011–2022 · USDA National Agricultural Statistics Service (mirrored by the University of Vermont)
  5. 5.Sap flow in sugar maple: timing and weather drivers (Frontiers in Agronomy, 2025) · de Lima Santos et al.
  6. 6.GeoNames gazetteer (cities500), CC BY 4.0 · GeoNames

FAQ

Sheboygan County sugaring questions

When should I tap maple trees in Sheboygan County, Wisconsin?
In a typical year the sap starts running around March 17 near Sheboygan and the season winds down around April 3. Have your taps in a day or two before the first forecast string of freezing nights and 40 °F days. In the past 36 seasons the weather signal came as early as Feb 12 and as late as Mar 28.
How much maple syrup does Sheboygan County produce?
The 2022 Census of Agriculture counted 10 maple operations in Sheboygan County with 10,136 taps producing 2,767 gallons of syrup, ranking 19 of 60 Wisconsin's counties with published tap counts.
How many sap days does Sheboygan County get in a season?
On average 22.7 freeze-thaw sap days from December through May at Sheboygan, of which about 9.2 are textbook days with a night in the 20s and a day in the 40s. The best season since 1991 was 2020 (40 sap days); the leanest was 1998 (8).
Where do these dates come from?
From 36 seasons of daily high and low temperatures at Sheboygan (PRISM 4-km grid), scored with the same freeze-thaw rule as our live forecast, then calibrated against USDA's reported season dates for Wisconsin. They describe a typical year at one point in the county; your sugarbush, slope and elevation can shift them by days.

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