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Pennsylvania · county maple atlas

Maple sugaring in Sullivan County, Pennsylvania

Sullivan County had 6 maple operations and 5,675 taps in the 2022 Census. Around Laporte, sap usually runs from March 7 to April 6. Here's the long-run pattern, 36 seasons of sap weather, and the outlook this week.
Too early to tapAbout 152 days until the usual start.
Sap starts
Mar 7
typical year
Season ends
Apr 6
about 4 weeks
Sap days / season
35.1
1991–2026 average
Taps, 2022
5,675
#16 of 45 in PA

Sap-flow outlook at Laporte right now

Full Pennsylvania forecast →

Forecast for Laporte, PA

Updated Oct 6, 8:31 AM EDT

Off-season for now. Sap needs freezing nights, and none are in sight. Sullivan County's season usually opens around March 7, which is 152 days away.

No freeze-thaw days in the forecast

freeze thaw 32°F

  1. WedOct 7
    40° / 63°

    0h below · 24h above

    No refreeze forecast
  2. ThuOct 8
    48° / 67°

    0h below · 24h above

    No refreeze forecast
  3. FriOct 9
    42° / 63°

    0h below · 24h above

    No refreeze forecast
  4. SatOct 10
    42° / 65°

    0h below · 24h above

    No refreeze forecast
  5. SunOct 11
    46° / 65°

    0h below · 24h above

    No refreeze forecast
  6. MonOct 12
    51° / 64°
    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 Laporte

Freeze-thaw weather at Laporte peaks in the weeks of Feb 16 to Apr 6, which hold about 52% of a season's sap days. March is the busiest month.
Typical season: Mar 7 – Apr 60246Week of Dec 1: 1.5 sap days on averageWeek of Dec 8: 1.6 sap days on averageWeek of Dec 15: 1.5 sap days on averageWeek of Dec 22: 1.6 sap days on averageWeek of Dec 29: 1.2 sap days on averageWeek of Jan 5: 0.8 sap days on averageWeek of Jan 12: 1.0 sap days on averageWeek of Jan 19: 0.9 sap days on averageWeek of Jan 26: 0.8 sap days on averageWeek of Feb 2: 1.3 sap days on averageWeek of Feb 9: 1.3 sap days on averageWeek of Feb 16: 1.8 sap days on averageWeek of Feb 23: 1.7 sap days on averageWeek of Mar 2: 2.1 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: 2.8 sap days on averageWeek of Mar 30: 2.6 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: 1.2 sap days on averageWeek of Apr 27: 0.6 sap days on averageWeek of May 4: 0.2 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 7
Average number of freeze-thaw sap days in each week of the season at Laporte, 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 2; the middle half of seasons fell between Feb 24 and Mar 10. Earliest Feb 10 (2024), latest Mar 26 (2013).
Closing signal
Median Apr 3; middle half between Mar 28 and Apr 11. Earliest Mar 13 (2012), latest Apr 20 (2001).
Sap days by month
Dec19%Jan11%Feb17%Mar30%Apr20%May2%

36 seasons of sap weather

Sullivan County seasons, 1991–2026

The best sap year at Laporte was 2020 with 58 freeze-thaw days; the leanest was 2011 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 24 – Mar 30, 33 sap days3320252025: Feb 27 – Apr 3, 33 sap days3320242024: Feb 10 – Mar 13, 32 sap days3220232023: Feb 27 – Apr 3, 50 sap days5020222022: Mar 2 – Apr 3, 41 sap days4120212021: Mar 2 – Apr 4, 26 sap days2620202020: Feb 24 – Mar 27, 58 sap days5820192019: Mar 9 – Apr 11, 38 sap days3820182018: Mar 10 – Apr 12, 41 sap days4120172017: Feb 22 – Mar 24, 30 sap days3020162016: Feb 18 – Mar 24, 40 sap days4020152015: Mar 15 – Apr 12, 28 sap days2820142014: Mar 14 – Apr 18, 32 sap days3220132013: Mar 26 – Apr 7, 27 sap days2720122012: Feb 13 – Mar 13, 39 sap days3920112011: Mar 13 – Apr 6, 23 sap days2320102010: Feb 23 – Mar 29, 24 sap days2420092009: Mar 1 – Apr 1, 32 sap days3220082008: Mar 8 – Apr 5, 35 sap days3520072007: Feb 26 – Mar 31, 31 sap days3120062006: Feb 24 – Mar 28, 28 sap days2820052005: Mar 6 – Mar 27, 34 sap days3420042004: Mar 9 – Apr 11, 31 sap days3120032003: Mar 9 – Apr 13, 28 sap days2820022002: Feb 23 – Mar 29, 45 sap days4520012001: Mar 17 – Apr 20, 28 sap days2820002000: Feb 16 – Mar 21, 39 sap days3919991999: Mar 1 – Apr 5, 41 sap days4119981998: Feb 20 – Mar 26, 35 sap days3519971997: Mar 2 – Apr 2, 41 sap days4119961996: Mar 10 – Apr 12, 33 sap days3319951995: Feb 19 – Mar 26, 42 sap days4219941994: Mar 11 – Apr 9, 40 sap days4019931993: Mar 13 – Apr 14, 30 sap days3019921992: Mar 13 – Apr 16, 30 sap days3019911991: Mar 1 – Apr 4, 44 sap days44
Each bar runs from the season's opening signal to its closing signal, estimated from daily temperatures at Laporte. Dashed lines mark the typical dates. The right column counts freeze-thaw sap days from December through May.

Maple production

Sullivan County in the Census of Agriculture

USDA counts maple operations every five years. In Sullivan County the 2022 Census found 6 farms making syrup (-33% since 2017), with taps -20% and syrup output -38% over the same five years. That works out to about 0.13 gallons of syrup per tap in 2022 (0.17 in 2017). Among the 385 counties in this atlas, Sullivan County ranks 183 by taps.

Sullivan County maple production, 2017 and 2022 (USDA Census of Agriculture)
Census yearFarmsTapsGallons of syrupGal / tap
202265,6757630.13
201797,0601,2240.17

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 Laporte (1,903ft), 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 Pennsylvania'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 — Pennsylvania, 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

Sullivan County sugaring questions

When should I tap maple trees in Sullivan County, Pennsylvania?
In a typical year the sap starts running around March 7 near Laporte and the season winds down around April 6. 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 10 and as late as Mar 26.
How much maple syrup does Sullivan County produce?
The 2022 Census of Agriculture counted 6 maple operations in Sullivan County with 5,675 taps producing 763 gallons of syrup, ranking 16 of 45 Pennsylvania's counties with published tap counts.
How many sap days does Sullivan County get in a season?
On average 35.1 freeze-thaw sap days from December through May at Laporte, of which about 12.8 are textbook days with a night in the 20s and a day in the 40s. The best season since 1991 was 2020 (58 sap days); the leanest was 2011 (23).
Where do these dates come from?
From 36 seasons of daily high and low temperatures at Laporte (PRISM 4-km grid), scored with the same freeze-thaw rule as our live forecast, then calibrated against USDA's reported season dates for Pennsylvania. 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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