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Ohio · county maple atlas

Maple sugaring in Williams County, Ohio

Williams County had 6 maple operations and 4,500 taps in the 2022 Census. Around Bryan, sap usually runs from February 23 to April 3. Here's the long-run pattern, 36 seasons of sap weather, and the outlook this week.
Too early to tapAbout 140 days until the usual start.
Sap starts
Feb 23
typical year
Season ends
Apr 3
about 6 weeks
Sap days / season
41.8
1991–2026 average
Taps, 2022
4,500
#20 of 63 in OH

Sap-flow outlook at Bryan right now

Full Ohio forecast →

Forecast for Bryan, OH

Updated Oct 6, 9:30 AM EDT

Off-season for now. Sap needs freezing nights, and none are in sight. Williams County's season usually opens around February 23, which is 140 days away.

No freeze-thaw days in the forecast

freeze thaw 32°F

  1. WedOct 7
    50° / 76°

    0h below · 24h above

    No refreeze forecast
  2. ThuOct 8
    50° / 68°

    0h below · 24h above

    No refreeze forecast
  3. FriOct 9
    45° / 69°

    0h below · 24h above

    No refreeze forecast
  4. SatOct 10
    46° / 75°

    0h below · 24h above

    No refreeze forecast
  5. SunOct 11
    53° / 74°

    0h below · 24h above

    No refreeze forecast
  6. MonOct 12
    53° / 75°
    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 Bryan

Freeze-thaw weather at Bryan peaks in the weeks of Feb 9 to Mar 30, which hold about 51% of a season's sap days. March is the busiest month.
Typical season: Feb 23 – Apr 30246Week of Dec 1: 2.3 sap days on averageWeek of Dec 8: 2.1 sap days on averageWeek of Dec 15: 2.0 sap days on averageWeek of Dec 22: 2.0 sap days on averageWeek of Dec 29: 1.4 sap days on averageWeek of Jan 5: 1.4 sap days on averageWeek of Jan 12: 1.3 sap days on averageWeek of Jan 19: 0.9 sap days on averageWeek of Jan 26: 1.4 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: 2.3 sap days on averageWeek of Feb 23: 2.3 sap days on averageWeek of Mar 2: 2.8 sap days on averageWeek of Mar 9: 3.0 sap days on averageWeek of Mar 16: 3.3 sap days on averageWeek of Mar 23: 3.1 sap days on averageWeek of Mar 30: 2.5 sap days on averageWeek of Apr 6: 1.9 sap days on averageWeek of Apr 13: 0.9 sap days on averageWeek of Apr 20: 0.6 sap days on averageWeek of Apr 27: 0.2 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: 0.0 sap days on averageWeek of May 25: 0.0 sap days on averageDecJanFebMarAprMaytaps in ~Feb 23
Average number of freeze-thaw sap days in each week of the season at Bryan, 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 18; the middle half of seasons fell between Feb 8 and Feb 26. Earliest Jan 19 (2017), latest Mar 8 (2014).
Closing signal
Median Mar 24; middle half between Mar 10 and Apr 1. Earliest Feb 19 (2017), latest Apr 7 (2014).
Sap days by month
Dec22%Jan13%Feb20%Mar32%Apr12%May0%

36 seasons of sap weather

Williams County seasons, 1991–2026

The best sap year at Bryan was 2018 with 59 freeze-thaw days; the leanest was 2003 with 25. 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 4 – Mar 4, 40 sap days4020252025: Feb 15 – Mar 22, 43 sap days4320242024: Feb 4 – Mar 3, 45 sap days4520232023: Jan 30 – Feb 27, 51 sap days5120222022: Feb 17 – Mar 14, 51 sap days5120212021: Feb 17 – Mar 22, 49 sap days4920202020: Feb 17 – Mar 24, 55 sap days5520192019: Mar 1 – Apr 2, 42 sap days4220182018: Feb 25 – Apr 1, 59 sap days5920172017: Jan 19 – Feb 19, 36 sap days3620162016: Feb 8 – Mar 8, 47 sap days4720152015: Mar 7 – Apr 5, 36 sap days3620142014: Mar 8 – Apr 7, 28 sap days2820132013: Mar 5 – Apr 5, 48 sap days4820122012: Feb 8 – Mar 13, 46 sap days4620112011: Mar 1 – Apr 3, 25 sap days2520102010: Feb 20 – Mar 27, 31 sap days3120092009: Feb 17 – Mar 24, 40 sap days4020082008: Mar 3 – Apr 4, 35 sap days3520072007: Feb 19 – Mar 21, 38 sap days3820062006: Feb 5 – Mar 8, 41 sap days4120052005: Feb 27 – Mar 29, 33 sap days3320042004: Feb 25 – Mar 25, 34 sap days3420032003: Feb 25 – Apr 1, 25 sap days2520022002: Feb 7 – Mar 12, 54 sap days5420012001: Mar 3 – Apr 5, 41 sap days4120002000: Feb 1 – Mar 6, 40 sap days4019991999: Feb 24 – Mar 30, 57 sap days5719981998: Jan 27 – Feb 26, 44 sap days4419971997: Feb 19 – Mar 25, 49 sap days4919961996: Feb 24 – Mar 31, 42 sap days4219951995: Feb 10 – Mar 11, 38 sap days3819941994: Feb 26 – Apr 1, 39 sap days3919931993: Mar 6 – Apr 5, 33 sap days3319921992: Feb 3 – Mar 2, 47 sap days4719911991: Feb 16 – Mar 17, 42 sap days42
Each bar runs from the season's opening signal to its closing signal, estimated from daily temperatures at Bryan. Dashed lines mark the typical dates. The right column counts freeze-thaw sap days from December through May.

Maple production

Williams County in the Census of Agriculture

USDA counts maple operations every five years. In Williams County the 2022 Census found 6 farms making syrup (+200% since 2017). Among the 385 counties in this atlas, Williams County ranks 200 by taps.

Williams County maple production, 2017 and 2022 (USDA Census of Agriculture)
Census yearFarmsTapsGallons of syrupGal / tap
202264,500withheld—
20172withheldwithheld—

“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 Bryan (748ft), 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

Williams County sugaring questions

When should I tap maple trees in Williams County, Ohio?
In a typical year the sap starts running around February 23 near Bryan 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 Jan 19 and as late as Mar 8.
How much maple syrup does Williams County produce?
The 2022 Census of Agriculture counted 6 maple operations in Williams County; USDA withheld the county's tap and gallon totals to avoid disclosing individual farms.
How many sap days does Williams County get in a season?
On average 41.8 freeze-thaw sap days from December through May at Bryan, of which about 15.2 are textbook days with a night in the 20s and a day in the 40s. The best season since 1991 was 2018 (59 sap days); the leanest was 2003 (25).
Where do these dates come from?
From 36 seasons of daily high and low temperatures at Bryan (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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