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Ohio · county maple atlas

Maple sugaring in Miami County, Ohio

Miami County had 6 maple operations and 4,317 taps in the 2022 Census. Around Troy, sap usually runs from February 12 to March 18. Here's the long-run pattern, 36 seasons of sap weather, and the outlook this week.
Too early to tapAbout 129 days until the usual start.
Sap starts
Feb 12
typical year
Season ends
Mar 18
about 5 weeks
Sap days / season
38.6
1991–2026 average
Taps, 2022
4,317
#21 of 63 in OH

Sap-flow outlook at Troy right now

Full Ohio forecast →

Forecast for Troy, OH

Updated Oct 6, 4:00 AM EDT

Off-season for now. Sap needs freezing nights, and none are in sight. Miami County's season usually opens around February 12, which is 129 days away.

No freeze-thaw days in the forecast

freeze thaw 32°F

  1. WedOct 7
    46° / 78°

    0h below · 24h above

    No refreeze forecast
  2. ThuOct 8
    51° / 73°

    0h below · 24h above

    No refreeze forecast
  3. FriOct 9
    44° / 70°

    0h below · 24h above

    No refreeze forecast
  4. SatOct 10
    46° / 76°

    0h below · 24h above

    No refreeze forecast
  5. SunOct 11
    53° / 75°

    0h below · 24h above

    No refreeze forecast
  6. MonOct 12
    54° / 77°
    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 Troy

Freeze-thaw weather at Troy peaks in the weeks of Jan 26 to Mar 23, which hold about 53% of a season's sap days. March is the busiest month.
Typical season: Feb 12 – Mar 180246Week of Dec 1: 2.0 sap days on averageWeek of Dec 8: 2.3 sap days on averageWeek of Dec 15: 2.4 sap days on averageWeek of Dec 22: 2.1 sap days on averageWeek of Dec 29: 1.5 sap days on averageWeek of Jan 5: 1.6 sap days on averageWeek of Jan 12: 1.7 sap days on averageWeek of Jan 19: 1.4 sap days on averageWeek of Jan 26: 1.9 sap days on averageWeek of Feb 2: 2.0 sap days on averageWeek of Feb 9: 2.2 sap days on averageWeek of Feb 16: 2.1 sap days on averageWeek of Feb 23: 2.5 sap days on averageWeek of Mar 2: 2.8 sap days on averageWeek of Mar 9: 2.3 sap days on averageWeek of Mar 16: 2.4 sap days on averageWeek of Mar 23: 2.3 sap days on averageWeek of Mar 30: 1.3 sap days on averageWeek of Apr 6: 1.3 sap days on averageWeek of Apr 13: 0.3 sap days on averageWeek of Apr 20: 0.1 sap days on averageWeek of Apr 27: 0.0 sap days on averageWeek of May 4: 0.0 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 12
Average number of freeze-thaw sap days in each week of the season at Troy, 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 7; the middle half of seasons fell between Jan 27 and Feb 15. Earliest Jan 11 (2023), latest Mar 4 (2010).
Closing signal
Median Mar 8; middle half between Mar 1 and Mar 15. Earliest Feb 1 (2006), latest Mar 31 (2014).
Sap days by month
Dec25%Jan18%Feb23%Mar28%Apr7%May0%

36 seasons of sap weather

Miami County seasons, 1991–2026

The best sap year at Troy was 2018 with 56 freeze-thaw days; the leanest was 2010 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: Jan 30 – Mar 3, 41 sap days4120252025: Feb 7 – Mar 9, 40 sap days4020242024: Feb 3 – Feb 21, 40 sap days4020232023: Jan 11 – Feb 15, 46 sap days4620222022: Feb 9 – Mar 14, 47 sap days4720212021: Feb 11 – Mar 16, 44 sap days4420202020: Jan 29 – Mar 3, 43 sap days4320192019: Feb 7 – Mar 13, 43 sap days4320182018: Jan 21 – Feb 18, 56 sap days5620172017: Jan 13 – Feb 17, 34 sap days3420162016: Feb 2 – Feb 28, 34 sap days3420152015: Feb 24 – Mar 30, 32 sap days3220142014: Mar 1 – Mar 31, 26 sap days2620132013: Feb 23 – Mar 30, 45 sap days4520122012: Jan 27 – Mar 1, 42 sap days4220112011: Feb 12 – Mar 8, 28 sap days2820102010: Mar 4 – Mar 8, 22 sap days2220092009: Feb 4 – Mar 5, 38 sap days3820082008: Feb 10 – Mar 14, 37 sap days3720072007: Feb 19 – Mar 12, 33 sap days3320062006: Jan 15 – Feb 1, 35 sap days3520052005: Feb 4 – Mar 6, 33 sap days3320042004: Feb 14 – Mar 20, 47 sap days4720032003: Mar 1 – Mar 15, 23 sap days2320022002: Jan 26 – Mar 2, 45 sap days4520012001: Feb 15 – Mar 20, 39 sap days3920002000: Jan 25 – Feb 22, 39 sap days3919991999: Jan 30 – Mar 5, 50 sap days5019981998: Jan 22 – Feb 15, 47 sap days4719971997: Jan 27 – Feb 26, 41 sap days4119961996: Feb 10 – Mar 14, 38 sap days3819951995: Feb 15 – Mar 11, 33 sap days3319941994: Feb 17 – Mar 20, 36 sap days3619931993: Feb 22 – Mar 20, 37 sap days3719921992: Jan 27 – Mar 2, 39 sap days3919911991: Feb 9 – Mar 16, 38 sap days38
Each bar runs from the season's opening signal to its closing signal, estimated from daily temperatures at Troy. Dashed lines mark the typical dates. The right column counts freeze-thaw sap days from December through May.

Maple production

Miami County in the Census of Agriculture

USDA counts maple operations every five years. In Miami County the 2022 Census found 6 farms making syrup (-33% since 2017), with taps +100% and syrup output +340% over the same five years. That works out to about 0.48 gallons of syrup per tap in 2022 (0.22 in 2017). Among the 385 counties in this atlas, Miami County ranks 204 by taps.

Miami County maple production, 2017 and 2022 (USDA Census of Agriculture)
Census yearFarmsTapsGallons of syrupGal / tap
202264,3172,0750.48
201792,1604720.22

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 Troy (869ft), 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

Miami County sugaring questions

When should I tap maple trees in Miami County, Ohio?
In a typical year the sap starts running around February 12 near Troy and the season winds down around March 18. 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 11 and as late as Mar 4.
How much maple syrup does Miami County produce?
The 2022 Census of Agriculture counted 6 maple operations in Miami County with 4,317 taps producing 2,075 gallons of syrup, ranking 21 of 63 Ohio's counties with published tap counts.
How many sap days does Miami County get in a season?
On average 38.6 freeze-thaw sap days from December through May at Troy, of which about 13.9 are textbook days with a night in the 20s and a day in the 40s. The best season since 1991 was 2018 (56 sap days); the leanest was 2010 (22).
Where do these dates come from?
From 36 seasons of daily high and low temperatures at Troy (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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