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New York · county maple atlas

Maple sugaring in Oswego County, New York

Oswego County had 23 maple operations and 29,530 taps in the 2022 Census. Around Oswego, sap usually runs from February 26 to March 30. Here's the long-run pattern, 36 seasons of sap weather, and the outlook this week.
Too early to tapAbout 143 days until the usual start.
Sap starts
Feb 26
typical year
Season ends
Mar 30
about 5 weeks
Sap days / season
25.9
1991–2026 average
Taps, 2022
29,530
#25 of 50 in NY

Sap-flow outlook at Oswego right now

Full New York forecast →

Forecast for Oswego, NY

Updated Oct 6, 9:58 AM EDT

Off-season for now. Sap needs freezing nights, and none are in sight. Oswego County's season usually opens around February 26, which is 143 days away.

No freeze-thaw days in the forecast

freeze thaw 32°F

  1. WedOct 7
    43° / 66°

    0h below · 24h above

    No refreeze forecast
  2. ThuOct 8
    52° / 61°

    0h below · 24h above

    No refreeze forecast
  3. FriOct 9
    47° / 58°

    0h below · 24h above

    No refreeze forecast
  4. SatOct 10
    45° / 61°

    0h below · 24h above

    No refreeze forecast
  5. SunOct 11
    48° / 69°

    0h below · 24h above

    No refreeze forecast
  6. MonOct 12
    53° / 66°
    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 Oswego

Freeze-thaw weather at Oswego peaks in the weeks of Feb 9 to Mar 30, which hold about 50% of a season's sap days. March is the busiest month.
Typical season: Feb 26 – Mar 300246Week of Dec 1: 1.3 sap days on averageWeek of Dec 8: 1.2 sap days on averageWeek of Dec 15: 1.4 sap days on averageWeek of Dec 22: 1.5 sap days on averageWeek of Dec 29: 1.4 sap days on averageWeek of Jan 5: 1.2 sap days on averageWeek of Jan 12: 1.0 sap days on averageWeek of Jan 19: 0.8 sap days on averageWeek of Jan 26: 0.9 sap days on averageWeek of Feb 2: 0.9 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: 1.6 sap days on averageWeek of Mar 2: 1.6 sap days on averageWeek of Mar 9: 1.8 sap days on averageWeek of Mar 16: 1.9 sap days on averageWeek of Mar 23: 1.8 sap days on averageWeek of Mar 30: 1.3 sap days on averageWeek of Apr 6: 1.1 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 26
Average number of freeze-thaw sap days in each week of the season at Oswego, 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 22 and Mar 11. Earliest Feb 6 (2006), latest Mar 15 (1992).
Closing signal
Median Mar 30; middle half between Mar 24 and Apr 5. Earliest Mar 3 (2024), latest Apr 16 (1992).
Sap days by month
Dec23%Jan17%Feb21%Mar29%Apr9%May0%

36 seasons of sap weather

Oswego County seasons, 1991–2026

The best sap year at Oswego was 1996 with 36 freeze-thaw days; the leanest was 2010 with 11. 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 29, 31 sap days3120252025: Mar 4 – Mar 27, 26 sap days2620242024: Feb 20 – Mar 3, 19 sap days1920232023: Feb 25 – Mar 31, 36 sap days3620222022: Feb 28 – Mar 31, 32 sap days3220212021: Feb 23 – Mar 21, 22 sap days2220202020: Feb 20 – Mar 23, 32 sap days3220192019: Mar 9 – Apr 11, 33 sap days3320182018: Mar 12 – Apr 12, 26 sap days2620172017: Feb 19 – Mar 24, 28 sap days2820162016: Feb 11 – Mar 13, 31 sap days3120152015: Mar 15 – Apr 2, 22 sap days2220142014: Mar 10 – Apr 3, 29 sap days2920132013: Mar 5 – Apr 7, 27 sap days2720122012: Feb 9 – Mar 12, 33 sap days3320112011: Mar 7 – Mar 29, 19 sap days1920102010: Feb 21 – Mar 28, 11 sap days1120092009: Feb 28 – Mar 25, 26 sap days2620082008: Mar 14 – Apr 5, 27 sap days2720072007: Mar 10 – Mar 31, 19 sap days1920062006: Feb 6 – Mar 9, 19 sap days1920052005: Mar 5 – Mar 27, 22 sap days2220042004: Mar 6 – Apr 7, 20 sap days2020032003: Mar 12 – Apr 14, 22 sap days2220022002: Feb 23 – Mar 28, 27 sap days2720012001: Mar 13 – Apr 5, 19 sap days1920002000: Feb 15 – Mar 21, 20 sap days2019991999: Mar 1 – Apr 5, 28 sap days2819981998: Feb 22 – Mar 26, 27 sap days2719971997: Mar 2 – Apr 1, 23 sap days2319961996: Mar 14 – Apr 16, 36 sap days3619951995: Feb 15 – Mar 19, 35 sap days3519941994: Mar 12 – Apr 8, 25 sap days2519931993: Mar 12 – Apr 5, 26 sap days2619921992: Mar 15 – Apr 16, 27 sap days2719911991: Feb 22 – Mar 21, 26 sap days26
Each bar runs from the season's opening signal to its closing signal, estimated from daily temperatures at Oswego. Dashed lines mark the typical dates. The right column counts freeze-thaw sap days from December through May.

Maple production

Oswego County in the Census of Agriculture

USDA counts maple operations every five years. In Oswego County the 2022 Census found 23 farms making syrup (-26% since 2017), with taps +104% and syrup output +92% over the same five years. That works out to about 0.23 gallons of syrup per tap in 2022 (0.24 in 2017). Among the 385 counties in this atlas, Oswego County ranks 78 by taps.

Oswego County maple production, 2017 and 2022 (USDA Census of Agriculture)
Census yearFarmsTapsGallons of syrupGal / tap
20222329,5306,7650.23
20173114,4993,5200.24

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 Oswego (299ft), 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 New York'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 — New York, 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

Oswego County sugaring questions

When should I tap maple trees in Oswego County, New York?
In a typical year the sap starts running around February 26 near Oswego 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 Feb 6 and as late as Mar 15.
How much maple syrup does Oswego County produce?
The 2022 Census of Agriculture counted 23 maple operations in Oswego County with 29,530 taps producing 6,765 gallons of syrup, ranking 25 of 50 New York's counties with published tap counts.
How many sap days does Oswego County get in a season?
On average 25.9 freeze-thaw sap days from December through May at Oswego, of which about 10 are textbook days with a night in the 20s and a day in the 40s. The best season since 1991 was 1996 (36 sap days); the leanest was 2010 (11).
Where do these dates come from?
From 36 seasons of daily high and low temperatures at Oswego (PRISM 4-km grid), scored with the same freeze-thaw rule as our live forecast, then calibrated against USDA's reported season dates for New York. 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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