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Wisconsin · county maple atlas

Maple sugaring in Marinette County, Wisconsin

Marinette County had 6 maple operations and 4,724 taps in the 2022 Census. Around Marinette, sap usually runs from March 17 to April 12. 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 12
about 4 weeks
Sap days / season
30.3
1991–2026 average
Taps, 2022
4,724
#28 of 60 in WI

Sap-flow outlook at Marinette right now

Full Wisconsin forecast →

Forecast for Marinette, WI

Updated Oct 6, 9:36 AM EDT

Off-season for now. Sap needs freezing nights, and none are in sight. Marinette 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
    48° / 71°

    0h below · 24h above

    No refreeze forecast
  2. ThuOct 8
    41° / 64°

    0h below · 24h above

    No refreeze forecast
  3. FriOct 9
    38° / 64°

    0h below · 24h above

    No refreeze forecast
  4. SatOct 10
    49° / 69°

    0h below · 24h above

    No refreeze forecast
  5. SunOct 11
    58° / 71°

    0h below · 24h above

    No refreeze forecast
  6. MonOct 12
    52° / 62°
    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 Marinette

Freeze-thaw weather at Marinette peaks in the weeks of Mar 2 to Apr 6, which hold about 48% of a season's sap days. March is the busiest month.
Typical season: Mar 17 – Apr 120246Week of Dec 1: 1.4 sap days on averageWeek of Dec 8: 1.3 sap days on averageWeek of Dec 15: 1.0 sap days on averageWeek of Dec 22: 1.2 sap days on averageWeek of Dec 29: 0.4 sap days on averageWeek of Jan 5: 0.9 sap days on averageWeek of Jan 12: 0.4 sap days on averageWeek of Jan 19: 0.3 sap days on averageWeek of Jan 26: 0.5 sap days on averageWeek of Feb 2: 0.8 sap days on averageWeek of Feb 9: 1.1 sap days on averageWeek of Feb 16: 1.1 sap days on averageWeek of Feb 23: 1.6 sap days on averageWeek of Mar 2: 1.9 sap days on averageWeek of Mar 9: 2.2 sap days on averageWeek of Mar 16: 2.7 sap days on averageWeek of Mar 23: 3.0 sap days on averageWeek of Mar 30: 2.5 sap days on averageWeek of Apr 6: 2.1 sap days on averageWeek of Apr 13: 1.5 sap days on averageWeek of Apr 20: 1.3 sap days on averageWeek of Apr 27: 0.6 sap days on averageWeek of May 4: 0.2 sap days on averageWeek of May 11: 0.1 sap days on averageWeek of May 18: 0.1 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 Marinette, 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 9 and Mar 21. Earliest Feb 14 (2012), latest Mar 30 (2014).
Closing signal
Median Apr 15; middle half between Apr 7 and Apr 21. Earliest Mar 11 (2012), latest Apr 29 (1996).
Sap days by month
Dec17%Jan7%Feb15%Mar36%Apr23%May2%

36 seasons of sap weather

Marinette County seasons, 1991–2026

The best sap year at Marinette was 2012 with 44 freeze-thaw days; the leanest was 2014 with 18. 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: Mar 12 – Apr 8, 27 sap days2720252025: Mar 14 – Apr 16, 39 sap days3920242024: Mar 5 – Mar 30, 35 sap days3520232023: Mar 11 – Apr 9, 38 sap days3820222022: Mar 25 – Apr 28, 28 sap days2820212021: Mar 4 – Apr 3, 35 sap days3520202020: Mar 22 – Apr 23, 37 sap days3720192019: Mar 20 – Apr 20, 31 sap days3120182018: Mar 28 – Apr 29, 37 sap days3720172017: Mar 6 – Mar 29, 22 sap days2220162016: Mar 20 – Apr 15, 27 sap days2720152015: Mar 14 – Apr 7, 26 sap days2620142014: Mar 30 – Apr 27, 18 sap days1820132013: Mar 28 – Apr 24, 32 sap days3220122012: Feb 14 – Mar 11, 44 sap days4420112011: Mar 23 – Apr 21, 25 sap days2520102010: Feb 28 – Mar 30, 22 sap days2220092009: Mar 17 – Apr 12, 32 sap days3220082008: Mar 18 – Apr 16, 20 sap days2020072007: Mar 12 – Apr 15, 25 sap days2520062006: Mar 9 – Apr 9, 27 sap days2720052005: Mar 10 – Apr 4, 25 sap days2520042004: Mar 13 – Apr 14, 31 sap days3120032003: Mar 19 – Apr 23, 28 sap days2820022002: Mar 15 – Apr 10, 42 sap days4220012001: Mar 17 – Apr 19, 28 sap days2820002000: Feb 28 – Mar 22, 34 sap days3419991999: Mar 3 – Mar 27, 37 sap days3719981998: Mar 2 – Apr 6, 25 sap days2519971997: Mar 20 – Apr 21, 27 sap days2719961996: Mar 25 – Apr 29, 32 sap days3219951995: Mar 14 – Apr 15, 33 sap days3319941994: Mar 14 – Apr 11, 29 sap days2919931993: Mar 22 – Apr 26, 27 sap days2719921992: Mar 22 – Apr 15, 35 sap days3519911991: Mar 8 – Apr 12, 29 sap days29
Each bar runs from the season's opening signal to its closing signal, estimated from daily temperatures at Marinette. Dashed lines mark the typical dates. The right column counts freeze-thaw sap days from December through May.

Maple production

Marinette County in the Census of Agriculture

USDA counts maple operations every five years. In Marinette County the 2022 Census found 6 farms making syrup (-40% since 2017), with taps -69% and syrup output -54% over the same five years. That works out to about 0.24 gallons of syrup per tap in 2022 (0.16 in 2017). Among the 385 counties in this atlas, Marinette County ranks 196 by taps.

Marinette County maple production, 2017 and 2022 (USDA Census of Agriculture)
Census yearFarmsTapsGallons of syrupGal / tap
202264,7241,1400.24
20171015,3002,4720.16

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 Marinette (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

Marinette County sugaring questions

When should I tap maple trees in Marinette County, Wisconsin?
In a typical year the sap starts running around March 17 near Marinette and the season winds down around April 12. 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 14 and as late as Mar 30.
How much maple syrup does Marinette County produce?
The 2022 Census of Agriculture counted 6 maple operations in Marinette County with 4,724 taps producing 1,140 gallons of syrup, ranking 28 of 60 Wisconsin's counties with published tap counts.
How many sap days does Marinette County get in a season?
On average 30.3 freeze-thaw sap days from December through May at Marinette, of which about 11.6 are textbook days with a night in the 20s and a day in the 40s. The best season since 1991 was 2012 (44 sap days); the leanest was 2014 (18).
Where do these dates come from?
From 36 seasons of daily high and low temperatures at Marinette (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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