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Pennsylvania · county maple atlas

Maple sugaring in Indiana County, Pennsylvania

Indiana County had 20 maple operations and 6,343 taps in the 2022 Census. Around Indiana, sap usually runs from February 17 to March 20. Here's the long-run pattern, 36 seasons of sap weather, and the outlook this week.
Too early to tapAbout 134 days until the usual start.
Sap starts
Feb 17
typical year
Season ends
Mar 20
about 4 weeks
Sap days / season
46.6
1991–2026 average
Taps, 2022
6,343
#13 of 45 in PA

Sap-flow outlook at Indiana right now

Full Pennsylvania forecast →

Forecast for Indiana, PA

Updated Oct 6, 8:36 AM EDT

Off-season for now. Sap needs freezing nights, and none are in sight. Indiana County's season usually opens around February 17, which is 134 days away.

No freeze-thaw days in the forecast

freeze thaw 32°F

  1. WedOct 7
    40° / 70°

    0h below · 24h above

    No refreeze forecast
  2. ThuOct 8
    52° / 69°

    0h below · 24h above

    No refreeze forecast
  3. FriOct 9
    43° / 65°

    0h below · 24h above

    No refreeze forecast
  4. SatOct 10
    43° / 70°

    0h below · 24h above

    No refreeze forecast
  5. SunOct 11
    50° / 68°

    0h below · 24h above

    No refreeze forecast
  6. MonOct 12
    53° / 70°
    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 Indiana

Freeze-thaw weather at Indiana peaks in the weeks of Jan 26 to Mar 30, which hold about 57% of a season's sap days. March is the busiest month.
Typical season: Feb 17 – Mar 200246Week of Dec 1: 2.2 sap days on averageWeek of Dec 8: 2.6 sap days on averageWeek of Dec 15: 2.3 sap days on averageWeek of Dec 22: 2.2 sap days on averageWeek of Dec 29: 1.8 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: 1.3 sap days on averageWeek of Jan 26: 2.1 sap days on averageWeek of Feb 2: 2.3 sap days on averageWeek of Feb 9: 2.3 sap days on averageWeek of Feb 16: 2.8 sap days on averageWeek of Feb 23: 2.8 sap days on averageWeek of Mar 2: 3.1 sap days on averageWeek of Mar 9: 2.9 sap days on averageWeek of Mar 16: 3.0 sap days on averageWeek of Mar 23: 2.9 sap days on averageWeek of Mar 30: 2.2 sap days on averageWeek of Apr 6: 1.9 sap days on averageWeek of Apr 13: 1.0 sap days on averageWeek of Apr 20: 0.8 sap days on averageWeek of Apr 27: 0.3 sap days on averageWeek of May 4: 0.2 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 17
Average number of freeze-thaw sap days in each week of the season at Indiana, 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 12; the middle half of seasons fell between Feb 1 and Feb 18. Earliest Jan 12 (2002), latest Mar 5 (2013).
Closing signal
Median Mar 17; middle half between Mar 3 and Mar 23. Earliest Feb 15 (2002), latest Apr 7 (2013).
Sap days by month
Dec22%Jan16%Feb22%Mar28%Apr11%May1%

36 seasons of sap weather

Indiana County seasons, 1991–2026

The best sap year at Indiana was 2012 with 63 freeze-thaw days; the leanest was 2003 with 30. 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, 37 sap days3720252025: Feb 12 – Mar 19, 45 sap days4520242024: Jan 28 – Mar 3, 52 sap days5220232023: Jan 18 – Feb 22, 63 sap days6320222022: Feb 12 – Mar 16, 57 sap days5720212021: Feb 18 – Mar 23, 48 sap days4820202020: Feb 1 – Mar 8, 55 sap days5520192019: Feb 18 – Mar 25, 45 sap days4520182018: Jan 26 – Feb 19, 55 sap days5520172017: Jan 18 – Feb 18, 35 sap days3520162016: Feb 6 – Mar 9, 55 sap days5520152015: Mar 4 – Apr 2, 39 sap days3920142014: Mar 4 – Apr 7, 38 sap days3820132013: Mar 5 – Apr 7, 46 sap days4620122012: Feb 7 – Mar 13, 63 sap days6320112011: Feb 24 – Mar 31, 37 sap days3720102010: Feb 16 – Mar 18, 36 sap days3620092009: Feb 12 – Mar 15, 49 sap days4920082008: Feb 13 – Mar 19, 48 sap days4820072007: Feb 15 – Mar 21, 35 sap days3520062006: Feb 2 – Mar 9, 47 sap days4720052005: Feb 13 – Mar 19, 41 sap days4120042004: Feb 20 – Mar 25, 41 sap days4120032003: Feb 20 – Mar 24, 30 sap days3020022002: Jan 12 – Feb 15, 43 sap days4320012001: Feb 14 – Mar 20, 43 sap days4320002000: Jan 25 – Mar 1, 45 sap days4519991999: Feb 11 – Mar 17, 57 sap days5719981998: Jan 18 – Feb 17, 51 sap days5119971997: Jan 29 – Feb 28, 54 sap days5419961996: Feb 18 – Mar 25, 46 sap days4619951995: Feb 8 – Mar 14, 56 sap days5619941994: Feb 28 – Apr 4, 46 sap days4619931993: Feb 23 – Mar 20, 37 sap days3719921992: Jan 30 – Mar 3, 48 sap days4819911991: Feb 14 – Mar 17, 53 sap days53
Each bar runs from the season's opening signal to its closing signal, estimated from daily temperatures at Indiana. Dashed lines mark the typical dates. The right column counts freeze-thaw sap days from December through May.

Maple production

Indiana County in the Census of Agriculture

USDA counts maple operations every five years. In Indiana County the 2022 Census found 20 farms making syrup (+100% since 2017), with taps +138% and syrup output +264% over the same five years. That works out to about 0.24 gallons of syrup per tap in 2022 (0.15 in 2017). Among the 385 counties in this atlas, Indiana County ranks 173 by taps.

Indiana County maple production, 2017 and 2022 (USDA Census of Agriculture)
Census yearFarmsTapsGallons of syrupGal / tap
2022206,3431,5070.24
2017102,6704140.15

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 Indiana (1,391ft), 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

Indiana County sugaring questions

When should I tap maple trees in Indiana County, Pennsylvania?
In a typical year the sap starts running around February 17 near Indiana and the season winds down around March 20. 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 12 and as late as Mar 5.
How much maple syrup does Indiana County produce?
The 2022 Census of Agriculture counted 20 maple operations in Indiana County with 6,343 taps producing 1,507 gallons of syrup, ranking 13 of 45 Pennsylvania's counties with published tap counts.
How many sap days does Indiana County get in a season?
On average 46.6 freeze-thaw sap days from December through May at Indiana, of which about 14.7 are textbook days with a night in the 20s and a day in the 40s. The best season since 1991 was 2012 (63 sap days); the leanest was 2003 (30).
Where do these dates come from?
From 36 seasons of daily high and low temperatures at Indiana (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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