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Wisconsin · county maple atlas

Maple sugaring in Dodge County, Wisconsin

Dodge County had 9 maple operations and 536 taps in the 2022 Census. Around Juneau, sap usually runs from March 10 to April 3. Here's the long-run pattern, 36 seasons of sap weather, and the outlook this week.
Too early to tapAbout 155 days until the usual start.
Sap starts
Mar 10
typical year
Season ends
Apr 3
about 3 weeks
Sap days / season
33.6
1991–2026 average
Taps, 2022
536
#48 of 60 in WI

Sap-flow outlook at Juneau right now

Full Wisconsin forecast →

Forecast for Juneau, WI

Updated Oct 6, 10:31 AM EDT

Off-season for now. Sap needs freezing nights, and none are in sight. Dodge County's season usually opens around March 10, which is 155 days away.

No freeze-thaw days in the forecast

freeze thaw 32°F

  1. WedOct 7
    53° / 71°

    0h below · 24h above

    No refreeze forecast
  2. ThuOct 8
    45° / 65°

    0h below · 24h above

    No refreeze forecast
  3. FriOct 9
    40° / 67°

    0h below · 24h above

    No refreeze forecast
  4. SatOct 10
    49° / 74°

    0h below · 24h above

    No refreeze forecast
  5. SunOct 11
    56° / 77°

    0h below · 24h above

    No refreeze forecast
  6. MonOct 12
    53° / 68°
    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 Juneau

Freeze-thaw weather at Juneau 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 10 – Apr 30246Week of Dec 1: 1.5 sap days on averageWeek of Dec 8: 1.6 sap days on averageWeek of Dec 15: 1.3 sap days on averageWeek of Dec 22: 1.1 sap days on averageWeek of Dec 29: 0.8 sap days on averageWeek of Jan 5: 1.0 sap days on averageWeek of Jan 12: 0.6 sap days on averageWeek of Jan 19: 0.4 sap days on averageWeek of Jan 26: 0.9 sap days on averageWeek of Feb 2: 1.1 sap days on averageWeek of Feb 9: 1.2 sap days on averageWeek of Feb 16: 1.6 sap days on averageWeek of Feb 23: 1.8 sap days on averageWeek of Mar 2: 2.3 sap days on averageWeek of Mar 9: 2.5 sap days on averageWeek of Mar 16: 3.3 sap days on averageWeek of Mar 23: 3.3 sap days on averageWeek of Mar 30: 2.7 sap days on averageWeek of Apr 6: 2.1 sap days on averageWeek of Apr 13: 1.2 sap days on averageWeek of Apr 20: 0.7 sap days on averageWeek of Apr 27: 0.3 sap days on averageWeek of May 4: 0.1 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 10
Average number of freeze-thaw sap days in each week of the season at Juneau, 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 7; the middle half of seasons fell between Feb 28 and Mar 11. Earliest Feb 9 (2024), latest Mar 26 (2013).
Closing signal
Median Apr 6; middle half between Mar 28 and Apr 14. Earliest Mar 5 (2000), latest Apr 29 (2018).
Sap days by month
Dec17%Jan10%Feb17%Mar38%Apr18%May1%

36 seasons of sap weather

Dodge County seasons, 1991–2026

The best sap year at Juneau was 2025 with 48 freeze-thaw days; the leanest was 2017 with 20. 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 19 – Mar 24, 33 sap days3320252025: Feb 23 – Mar 27, 48 sap days4820242024: Feb 9 – Mar 16, 39 sap days3920232023: Mar 8 – Apr 8, 46 sap days4620222022: Mar 15 – Apr 19, 34 sap days3420212021: Feb 28 – Apr 3, 33 sap days3320202020: Mar 6 – Apr 7, 46 sap days4620192019: Mar 13 – Apr 16, 33 sap days3320182018: Mar 26 – Apr 29, 46 sap days4620172017: Feb 24 – Mar 24, 20 sap days2020162016: Feb 23 – Mar 27, 28 sap days2820152015: Mar 7 – Apr 4, 24 sap days2420142014: Mar 17 – Apr 17, 29 sap days2920132013: Mar 26 – Apr 21, 25 sap days2520122012: Feb 12 – Mar 12, 36 sap days3620112011: Mar 9 – Apr 1, 22 sap days2220102010: Mar 4 – Mar 30, 21 sap days2120092009: Mar 10 – Apr 12, 33 sap days3320082008: Mar 14 – Apr 16, 23 sap days2320072007: Feb 21 – Mar 21, 32 sap days3220062006: Mar 7 – Apr 10, 34 sap days3420052005: Mar 3 – Mar 28, 28 sap days2820042004: Feb 28 – Apr 3, 43 sap days4320032003: Mar 7 – Apr 10, 29 sap days2920022002: Mar 8 – Apr 7, 45 sap days4520012001: Mar 10 – Apr 2, 24 sap days2420002000: Mar 1 – Mar 5, 38 sap days3819991999: Feb 27 – Mar 28, 35 sap days3519981998: Feb 23 – Mar 25, 25 sap days2519971997: Mar 11 – Apr 15, 25 sap days2519961996: Mar 16 – Apr 18, 41 sap days4119951995: Mar 7 – Apr 10, 38 sap days3819941994: Mar 10 – Apr 8, 37 sap days3719931993: Mar 20 – Apr 22, 40 sap days4019921992: Mar 12 – Apr 14, 41 sap days4119911991: Mar 1 – Apr 2, 34 sap days34
Each bar runs from the season's opening signal to its closing signal, estimated from daily temperatures at Juneau. Dashed lines mark the typical dates. The right column counts freeze-thaw sap days from December through May.

Maple production

Dodge County in the Census of Agriculture

USDA counts maple operations every five years. In Dodge County the 2022 Census found 9 farms making syrup (+50% since 2017), with taps -66% and syrup output -61% over the same five years. That works out to about 0.21 gallons of syrup per tap in 2022 (0.19 in 2017). Among the 385 counties in this atlas, Dodge County ranks 312 by taps.

Dodge County maple production, 2017 and 2022 (USDA Census of Agriculture)
Census yearFarmsTapsGallons of syrupGal / tap
202295361140.21
201761,5902960.19

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 Juneau (899ft), 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

Dodge County sugaring questions

When should I tap maple trees in Dodge County, Wisconsin?
In a typical year the sap starts running around March 10 near Juneau 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 9 and as late as Mar 26.
How much maple syrup does Dodge County produce?
The 2022 Census of Agriculture counted 9 maple operations in Dodge County with 536 taps producing 114 gallons of syrup, ranking 48 of 60 Wisconsin's counties with published tap counts.
How many sap days does Dodge County get in a season?
On average 33.6 freeze-thaw sap days from December through May at Juneau, of which about 11.2 are textbook days with a night in the 20s and a day in the 40s. The best season since 1991 was 2025 (48 sap days); the leanest was 2017 (20).
Where do these dates come from?
From 36 seasons of daily high and low temperatures at Juneau (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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