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Ohio · county maple atlas

Maple sugaring in Huron County, Ohio

Huron County had 10 maple operations and 3,595 taps in the 2022 Census. Around Norwalk, sap usually runs from February 20 to March 28. Here's the long-run pattern, 36 seasons of sap weather, and the outlook this week.
Too early to tapAbout 137 days until the usual start.
Sap starts
Feb 20
typical year
Season ends
Mar 28
about 5 weeks
Sap days / season
37.9
1991–2026 average
Taps, 2022
3,595
#23 of 63 in OH

Sap-flow outlook at Norwalk right now

Full Ohio forecast →

Forecast for Norwalk, OH

Updated Oct 6, 3:46 AM EDT

Off-season for now. Sap needs freezing nights, and none are in sight. Huron County's season usually opens around February 20, which is 137 days away.

No freeze-thaw days in the forecast

freeze thaw 32°F

  1. WedOct 7
    49° / 76°

    0h below · 24h above

    No refreeze forecast
  2. ThuOct 8
    50° / 70°

    0h below · 24h above

    No refreeze forecast
  3. FriOct 9
    44° / 68°

    0h below · 24h above

    No refreeze forecast
  4. SatOct 10
    46° / 74°

    0h below · 24h above

    No refreeze forecast
  5. SunOct 11
    55° / 73°

    0h below · 24h above

    No refreeze forecast
  6. MonOct 12
    55° / 73°
    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 Norwalk

Freeze-thaw weather at Norwalk peaks in the weeks of Feb 2 to Apr 6, which hold about 58% of a season's sap days. March is the busiest month.
Typical season: Feb 20 – Mar 280246Week of Dec 1: 1.7 sap days on averageWeek of Dec 8: 2.0 sap days on averageWeek of Dec 15: 2.1 sap days on averageWeek of Dec 22: 1.8 sap days on averageWeek of Dec 29: 1.5 sap days on averageWeek of Jan 5: 1.4 sap days on averageWeek of Jan 12: 1.4 sap days on averageWeek of Jan 19: 1.1 sap days on averageWeek of Jan 26: 1.6 sap days on averageWeek of Feb 2: 1.9 sap days on averageWeek of Feb 9: 2.0 sap days on averageWeek of Feb 16: 2.1 sap days on averageWeek of Feb 23: 2.2 sap days on averageWeek of Mar 2: 2.4 sap days on averageWeek of Mar 9: 2.5 sap days on averageWeek of Mar 16: 2.8 sap days on averageWeek of Mar 23: 2.3 sap days on averageWeek of Mar 30: 2.0 sap days on averageWeek of Apr 6: 1.8 sap days on averageWeek of Apr 13: 0.7 sap days on averageWeek of Apr 20: 0.4 sap days on averageWeek of Apr 27: 0.1 sap days on averageWeek of May 4: 0.1 sap days on averageWeek of May 11: 0.0 sap days on averageWeek of May 18: 0.0 sap days on averageWeek of May 25: 0.0 sap days on averageDecJanFebMarAprMaytaps in ~Feb 20
Average number of freeze-thaw sap days in each week of the season at Norwalk, 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 Feb 15; the middle half of seasons fell between Feb 4 and Feb 24. Earliest Jan 17 (2017), latest Mar 6 (1993).
Closing signal
Median Mar 18; middle half between Mar 7 and Mar 29. Earliest Feb 17 (2017), latest Apr 6 (2013).
Sap days by month
Dec22%Jan16%Feb22%Mar29%Apr12%May0%

36 seasons of sap weather

Huron County seasons, 1991–2026

The best sap year at Norwalk was 1999 with 52 freeze-thaw days; the leanest was 2010 with 23. 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 10 – Mar 3, 35 sap days3520252025: Feb 12 – Mar 18, 39 sap days3920242024: Feb 3 – Mar 2, 39 sap days3920232023: Jan 27 – Feb 19, 46 sap days4620222022: Feb 13 – Mar 14, 47 sap days4720212021: Feb 16 – Mar 22, 39 sap days3920202020: Feb 4 – Mar 9, 41 sap days4120192019: Feb 21 – Mar 28, 40 sap days4020182018: Jan 24 – Feb 18, 46 sap days4620172017: Jan 17 – Feb 17, 33 sap days3320162016: Feb 4 – Mar 7, 40 sap days4020152015: Mar 3 – Apr 5, 29 sap days2920142014: Mar 6 – Apr 6, 30 sap days3020132013: Mar 2 – Apr 6, 44 sap days4420122012: Feb 5 – Mar 12, 44 sap days4420112011: Feb 25 – Apr 1, 26 sap days2620102010: Mar 4 – Mar 28, 23 sap days2320092009: Feb 15 – Mar 22, 39 sap days3920082008: Feb 26 – Mar 31, 39 sap days3920072007: Feb 17 – Mar 21, 29 sap days2920062006: Feb 2 – Mar 8, 33 sap days3320052005: Feb 23 – Mar 27, 32 sap days3220042004: Feb 20 – Mar 24, 36 sap days3620032003: Feb 21 – Mar 15, 28 sap days2820022002: Feb 1 – Mar 6, 42 sap days4220012001: Mar 2 – Apr 5, 34 sap days3420002000: Jan 29 – Mar 5, 35 sap days3519991999: Feb 22 – Mar 28, 52 sap days5219981998: Jan 23 – Feb 25, 41 sap days4119971997: Feb 10 – Mar 17, 49 sap days4919961996: Feb 24 – Mar 31, 40 sap days4019951995: Feb 15 – Mar 17, 40 sap days4019941994: Feb 26 – Mar 31, 34 sap days3419931993: Mar 6 – Apr 3, 38 sap days3819921992: Feb 2 – Mar 5, 44 sap days4419911991: Feb 15 – Mar 17, 38 sap days38
Each bar runs from the season's opening signal to its closing signal, estimated from daily temperatures at Norwalk. Dashed lines mark the typical dates. The right column counts freeze-thaw sap days from December through May.

Maple production

Huron County in the Census of Agriculture

USDA counts maple operations every five years. In Huron County the 2022 Census found 10 farms making syrup (+233% since 2017). That works out to about 0.11 gallons of syrup per tap in 2022. Among the 385 counties in this atlas, Huron County ranks 218 by taps.

Huron County maple production, 2017 and 2022 (USDA Census of Agriculture)
Census yearFarmsTapsGallons of syrupGal / tap
2022103,5953980.11
20173withheldwithheld—

“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 Norwalk (696ft), 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 Ohio's USDA record (8 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 — Ohio, 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

Huron County sugaring questions

When should I tap maple trees in Huron County, Ohio?
In a typical year the sap starts running around February 20 near Norwalk and the season winds down around March 28. 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 Jan 17 and as late as Mar 6.
How much maple syrup does Huron County produce?
The 2022 Census of Agriculture counted 10 maple operations in Huron County with 3,595 taps producing 398 gallons of syrup, ranking 23 of 63 Ohio's counties with published tap counts.
How many sap days does Huron County get in a season?
On average 37.9 freeze-thaw sap days from December through May at Norwalk, of which about 14.2 are textbook days with a night in the 20s and a day in the 40s. The best season since 1991 was 1999 (52 sap days); the leanest was 2010 (23).
Where do these dates come from?
From 36 seasons of daily high and low temperatures at Norwalk (PRISM 4-km grid), scored with the same freeze-thaw rule as our live forecast, then calibrated against USDA's reported season dates for Ohio. 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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