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Ohio · county maple atlas

Maple sugaring in Trumbull County, Ohio

Trumbull County had 34 maple operations and 30,591 taps in the 2022 Census, number 4 in Ohio. Around Warren, sap usually runs from February 20 to March 30. 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 30
about 5 weeks
Sap days / season
47.8
1991–2026 average
Taps, 2022
30,591
#4 of 63 in OH

Sap-flow outlook at Warren right now

Full Ohio forecast →

Forecast for Warren, OH

Updated Oct 6, 3:46 AM EDT

Off-season for now. Sap needs freezing nights, and none are in sight. Trumbull 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
    43° / 72°

    0h below · 24h above

    No refreeze forecast
  2. ThuOct 8
    51° / 69°

    0h below · 24h above

    No refreeze forecast
  3. FriOct 9
    43° / 67°

    0h below · 24h above

    No refreeze forecast
  4. SatOct 10
    43° / 72°

    0h below · 24h above

    No refreeze forecast
  5. SunOct 11
    51° / 70°

    0h below · 24h above

    No refreeze forecast
  6. MonOct 12
    54° / 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 Warren

Freeze-thaw weather at Warren peaks in the weeks of Jan 26 to Apr 6, which hold about 61% of a season's sap days. March is the busiest month.
Typical season: Feb 20 – Mar 300246Week of Dec 1: 2.0 sap days on averageWeek of Dec 8: 2.5 sap days on averageWeek of Dec 15: 2.3 sap days on averageWeek of Dec 22: 2.1 sap days on averageWeek of Dec 29: 1.6 sap days on averageWeek of Jan 5: 1.9 sap days on averageWeek of Jan 12: 1.7 sap days on averageWeek of Jan 19: 1.2 sap days on averageWeek of Jan 26: 2.0 sap days on averageWeek of Feb 2: 2.3 sap days on averageWeek of Feb 9: 2.1 sap days on averageWeek of Feb 16: 2.6 sap days on averageWeek of Feb 23: 2.8 sap days on averageWeek of Mar 2: 3.2 sap days on averageWeek of Mar 9: 2.9 sap days on averageWeek of Mar 16: 2.9 sap days on averageWeek of Mar 23: 3.0 sap days on averageWeek of Mar 30: 2.9 sap days on averageWeek of Apr 6: 2.4 sap days on averageWeek of Apr 13: 1.3 sap days on averageWeek of Apr 20: 1.0 sap days on averageWeek of Apr 27: 0.6 sap days on averageWeek of May 4: 0.3 sap days on averageWeek of May 11: 0.2 sap days on averageWeek of May 18: 0.1 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 Warren, 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 3 and Feb 24. Earliest Jan 19 (2017), latest Mar 6 (2014).
Closing signal
Median Mar 20; middle half between Mar 8 and Mar 29. Earliest Feb 16 (1998), latest Apr 8 (2013).
Sap days by month
Dec20%Jan15%Feb20%Mar28%Apr15%May1%

36 seasons of sap weather

Trumbull County seasons, 1991–2026

The best sap year at Warren was 2012 with 69 freeze-thaw days; the leanest was 2003 with 32. 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 3 – Mar 3, 40 sap days4020252025: Feb 13 – Mar 18, 43 sap days4320242024: Jan 31 – Feb 26, 45 sap days4520232023: Jan 19 – Feb 22, 63 sap days6320222022: Feb 15 – Mar 15, 56 sap days5620212021: Feb 17 – Mar 21, 46 sap days4620202020: Feb 6 – Mar 12, 67 sap days6720192019: Feb 23 – Mar 28, 55 sap days5520182018: Jan 26 – Feb 28, 59 sap days5920172017: Jan 19 – Feb 20, 40 sap days4020162016: Feb 5 – Mar 8, 54 sap days5420152015: Mar 4 – Apr 2, 34 sap days3420142014: Mar 6 – Apr 7, 40 sap days4020132013: Mar 4 – Apr 8, 52 sap days5220122012: Feb 5 – Mar 12, 69 sap days6920112011: Feb 27 – Apr 3, 32 sap days3220102010: Feb 15 – Mar 17, 35 sap days3520092009: Feb 17 – Mar 24, 45 sap days4520082008: Feb 28 – Apr 4, 39 sap days3920072007: Feb 17 – Mar 22, 37 sap days3720062006: Feb 2 – Mar 9, 44 sap days4420052005: Feb 22 – Mar 25, 37 sap days3720042004: Feb 21 – Mar 25, 42 sap days4220032003: Feb 21 – Mar 24, 32 sap days3220022002: Jan 30 – Mar 6, 51 sap days5120012001: Mar 2 – Apr 5, 49 sap days4920002000: Jan 29 – Mar 5, 45 sap days4519991999: Feb 24 – Mar 30, 56 sap days5619981998: Jan 23 – Feb 16, 50 sap days5019971997: Feb 12 – Mar 19, 55 sap days5519961996: Feb 24 – Mar 31, 50 sap days5019951995: Feb 15 – Mar 12, 58 sap days5819941994: Mar 1 – Apr 5, 48 sap days4819931993: Feb 25 – Mar 27, 45 sap days4519921992: Feb 1 – Mar 5, 55 sap days5519911991: Feb 15 – Mar 20, 53 sap days53
Each bar runs from the season's opening signal to its closing signal, estimated from daily temperatures at Warren. Dashed lines mark the typical dates. The right column counts freeze-thaw sap days from December through May.

Maple production

Trumbull County in the Census of Agriculture

USDA counts maple operations every five years. In Trumbull County the 2022 Census found 34 farms making syrup (-31% since 2017), with taps -5% and syrup output +55% over the same five years. That works out to about 0.27 gallons of syrup per tap in 2022 (0.17 in 2017). Among the 385 counties in this atlas, Trumbull County ranks 74 by taps.

Trumbull County maple production, 2017 and 2022 (USDA Census of Agriculture)
Census yearFarmsTapsGallons of syrupGal / tap
20223430,5918,3260.27
20174932,1935,3580.17

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 Warren (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 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

Trumbull County sugaring questions

When should I tap maple trees in Trumbull County, Ohio?
In a typical year the sap starts running around February 20 near Warren and the season winds down around March 30. 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 6.
How much maple syrup does Trumbull County produce?
The 2022 Census of Agriculture counted 34 maple operations in Trumbull County with 30,591 taps producing 8,326 gallons of syrup, ranking 4 of 63 Ohio's counties with published tap counts.
How many sap days does Trumbull County get in a season?
On average 47.8 freeze-thaw sap days from December through May at Warren, 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 2012 (69 sap days); the leanest was 2003 (32).
Where do these dates come from?
From 36 seasons of daily high and low temperatures at Warren (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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