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Wisconsin · county maple atlas

Maple sugaring in Barron County, Wisconsin

Barron County had 36 maple operations and 53,574 taps in the 2022 Census. Around Barron, sap usually runs from March 17 to April 11. 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 11
about 4 weeks
Sap days / season
34
1991–2026 average
Taps, 2022
53,574
#10 of 60 in WI

Sap-flow outlook at Barron right now

Full Wisconsin forecast →

Forecast for Barron, WI

Updated Oct 6, 6:44 AM EDT

Off-season for now. Sap needs freezing nights, and none are in sight. Barron 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
    43° / 66°

    0h below · 24h above

    No refreeze forecast
  3. FriOct 9
    41° / 68°

    0h below · 24h above

    No refreeze forecast
  4. SatOct 10
    52° / 77°

    0h below · 24h above

    No refreeze forecast
  5. SunOct 11
    60° / 74°

    0h below · 24h above

    No refreeze forecast
  6. MonOct 12
    52° / 61°
    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 Barron

Freeze-thaw weather at Barron peaks in the weeks of Mar 2 to Apr 6, which hold about 53% of a season's sap days. March is the busiest month.
Typical season: Mar 17 – Apr 110246Week of Dec 1: 0.9 sap days on averageWeek of Dec 8: 1.1 sap days on averageWeek of Dec 15: 0.8 sap days on averageWeek of Dec 22: 0.6 sap days on averageWeek of Dec 29: 0.4 sap days on averageWeek of Jan 5: 0.4 sap days on averageWeek of Jan 12: 0.3 sap days on averageWeek of Jan 19: 0.3 sap days on averageWeek of Jan 26: 0.7 sap days on averageWeek of Feb 2: 1.0 sap days on averageWeek of Feb 9: 0.9 sap days on averageWeek of Feb 16: 1.3 sap days on averageWeek of Feb 23: 1.5 sap days on averageWeek of Mar 2: 2.3 sap days on averageWeek of Mar 9: 2.7 sap days on averageWeek of Mar 16: 3.2 sap days on averageWeek of Mar 23: 3.5 sap days on averageWeek of Mar 30: 3.4 sap days on averageWeek of Apr 6: 2.9 sap days on averageWeek of Apr 13: 2.1 sap days on averageWeek of Apr 20: 2.0 sap days on averageWeek of Apr 27: 1.1 sap days on averageWeek of May 4: 0.4 sap days on averageWeek of May 11: 0.3 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 Barron, 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 8 and Mar 22. Earliest Feb 15 (2012), latest Apr 2 (2013).
Closing signal
Median Apr 14; middle half between Apr 8 and Apr 22. Earliest Mar 11 (2012), latest May 4 (2013).
Sap days by month
Dec11%Jan5%Feb14%Mar38%Apr30%May3%

36 seasons of sap weather

Barron County seasons, 1991–2026

The best sap year at Barron was 2024 with 50 freeze-thaw days; the leanest was 2001 with 22. 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 8 – Apr 11, 37 sap days3720252025: Mar 10 – Apr 12, 44 sap days4420242024: Mar 6 – Apr 7, 50 sap days5020232023: Mar 23 – Apr 27, 32 sap days3220222022: Mar 24 – Apr 28, 36 sap days3620212021: Mar 3 – Apr 4, 45 sap days4520202020: Mar 22 – Apr 23, 44 sap days4420192019: Mar 20 – Apr 20, 29 sap days2920182018: Mar 29 – Apr 29, 46 sap days4620172017: Mar 4 – Apr 8, 29 sap days2920162016: Mar 11 – Apr 14, 32 sap days3220152015: Mar 8 – Apr 11, 28 sap days2820142014: Mar 30 – Apr 26, 22 sap days2220132013: Apr 2 – May 4, 22 sap days2220122012: Feb 15 – Mar 11, 25 sap days2520112011: Mar 20 – Apr 24, 38 sap days3820102010: Feb 27 – Mar 30, 28 sap days2820092009: Mar 13 – Apr 15, 36 sap days3620082008: Mar 22 – Apr 16, 25 sap days2520072007: Mar 12 – Apr 16, 32 sap days3220062006: Mar 10 – Apr 10, 26 sap days2620052005: Mar 6 – Apr 8, 36 sap days3620042004: Mar 14 – Apr 15, 44 sap days4420032003: Mar 23 – Apr 10, 24 sap days2420022002: Mar 14 – Apr 9, 47 sap days4720012001: Mar 17 – Apr 19, 22 sap days2220002000: Feb 21 – Mar 27, 35 sap days3519991999: Mar 8 – Mar 30, 38 sap days3819981998: Mar 3 – Apr 5, 29 sap days2919971997: Mar 21 – Apr 24, 30 sap days3019961996: Mar 28 – Apr 29, 39 sap days3919951995: Mar 16 – Apr 14, 32 sap days3219941994: Mar 14 – Apr 11, 38 sap days3819931993: Mar 21 – Apr 22, 30 sap days3019921992: Mar 23 – Apr 18, 34 sap days3419911991: Mar 3 – Apr 2, 40 sap days40
Each bar runs from the season's opening signal to its closing signal, estimated from daily temperatures at Barron. Dashed lines mark the typical dates. The right column counts freeze-thaw sap days from December through May.

Maple production

Barron County in the Census of Agriculture

USDA counts maple operations every five years. In Barron County the 2022 Census found 36 farms making syrup (-8% since 2017), with taps +46% and syrup output +67% over the same five years. That works out to about 0.24 gallons of syrup per tap in 2022 (0.21 in 2017). Among the 385 counties in this atlas, Barron County ranks 55 by taps.

Barron County maple production, 2017 and 2022 (USDA Census of Agriculture)
Census yearFarmsTapsGallons of syrupGal / tap
20223653,57412,7830.24
20173936,8167,6460.21

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 Barron (1,119ft), 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

Barron County sugaring questions

When should I tap maple trees in Barron County, Wisconsin?
In a typical year the sap starts running around March 17 near Barron and the season winds down around April 11. 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 15 and as late as Apr 2.
How much maple syrup does Barron County produce?
The 2022 Census of Agriculture counted 36 maple operations in Barron County with 53,574 taps producing 12,783 gallons of syrup, ranking 10 of 60 Wisconsin's counties with published tap counts.
How many sap days does Barron County get in a season?
On average 34 freeze-thaw sap days from December through May at Barron, of which about 8.8 are textbook days with a night in the 20s and a day in the 40s. The best season since 1991 was 2024 (50 sap days); the leanest was 2001 (22).
Where do these dates come from?
From 36 seasons of daily high and low temperatures at Barron (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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