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Michigan · county maple atlas

Maple sugaring in Allegan County, Michigan

Allegan County had 12 maple operations and 1,057 taps in the 2022 Census. Around Allegan, sap usually runs from February 24 to March 29. Here's the long-run pattern, 36 seasons of sap weather, and the outlook this week.
Too early to tapAbout 141 days until the usual start.
Sap starts
Feb 24
typical year
Season ends
Mar 29
about 5 weeks
Sap days / season
41.9
1991–2026 average
Taps, 2022
1,057
#54 of 66 in MI

Sap-flow outlook at Allegan right now

Full Michigan forecast →

Forecast for Allegan, MI

Updated Oct 6, 11:03 AM EDT

Off-season for now. Sap needs freezing nights, and none are in sight. Allegan County's season usually opens around February 24, which is 141 days away.

No freeze-thaw days in the forecast

freeze thaw 32°F

  1. WedOct 7
    55° / 70°

    0h below · 24h above

    No refreeze forecast
  2. ThuOct 8
    50° / 64°

    0h below · 24h above

    No refreeze forecast
  3. FriOct 9
    43° / 66°

    0h below · 24h above

    No refreeze forecast
  4. SatOct 10
    46° / 72°

    0h below · 24h above

    No refreeze forecast
  5. SunOct 11
    54° / 75°

    0h below · 24h above

    No refreeze forecast
  6. MonOct 12
    53° / 72°
    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 Allegan

Freeze-thaw weather at Allegan peaks in the weeks of Mar 2 to Apr 6, which hold about 43% of a season's sap days. March is the busiest month.
Typical season: Feb 24 – Mar 290246Week of Dec 1: 1.7 sap days on averageWeek of Dec 8: 2.0 sap days on averageWeek of Dec 15: 1.7 sap days on averageWeek of Dec 22: 1.7 sap days on averageWeek of Dec 29: 1.2 sap days on averageWeek of Jan 5: 1.3 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: 1.3 sap days on averageWeek of Feb 9: 1.5 sap days on averageWeek of Feb 16: 1.9 sap days on averageWeek of Feb 23: 1.9 sap days on averageWeek of Mar 2: 2.5 sap days on averageWeek of Mar 9: 2.9 sap days on averageWeek of Mar 16: 3.3 sap days on averageWeek of Mar 23: 3.4 sap days on averageWeek of Mar 30: 3.3 sap days on averageWeek of Apr 6: 2.6 sap days on averageWeek of Apr 13: 1.9 sap days on averageWeek of Apr 20: 1.3 sap days on averageWeek of Apr 27: 0.8 sap days on averageWeek of May 4: 0.4 sap days on averageWeek of May 11: 0.4 sap days on averageWeek of May 18: 0.1 sap days on averageWeek of May 25: 0.1 sap days on averageDecJanFebMarAprMaytaps in ~Feb 24
Average number of freeze-thaw sap days in each week of the season at Allegan, 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 28; the middle half of seasons fell between Feb 22 and Mar 7. Earliest Feb 1 (2017), latest Mar 15 (2014).
Closing signal
Median Apr 1; middle half between Mar 25 and Apr 6. Earliest Mar 3 (2024), latest Apr 17 (2014).
Sap days by month
Dec18%Jan11%Feb16%Mar32%Apr21%May3%

36 seasons of sap weather

Allegan County seasons, 1991–2026

The best sap year at Allegan was 2018 with 62 freeze-thaw days; the leanest was 2001 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 14 – Mar 19, 36 sap days3620252025: Feb 22 – Mar 27, 36 sap days3620242024: Feb 2 – Mar 3, 37 sap days3720232023: Feb 24 – Mar 31, 50 sap days5020222022: Mar 2 – Apr 3, 45 sap days4520212021: Feb 22 – Mar 21, 43 sap days4320202020: Feb 28 – Apr 3, 50 sap days5020192019: Mar 4 – Apr 2, 41 sap days4120182018: Mar 9 – Apr 11, 62 sap days6220172017: Feb 1 – Mar 6, 40 sap days4020162016: Feb 16 – Mar 23, 47 sap days4720152015: Mar 8 – Apr 5, 31 sap days3120142014: Mar 15 – Apr 17, 30 sap days3020132013: Mar 13 – Apr 14, 45 sap days4520122012: Feb 10 – Mar 12, 46 sap days4620112011: Mar 7 – Apr 3, 31 sap days3120102010: Feb 28 – Mar 30, 37 sap days3720092009: Feb 27 – Mar 30, 44 sap days4420082008: Mar 12 – Apr 4, 39 sap days3920072007: Feb 21 – Mar 23, 36 sap days3620062006: Feb 27 – Mar 30, 38 sap days3820052005: Mar 3 – Apr 5, 40 sap days4020042004: Feb 25 – Mar 25, 44 sap days4420032003: Mar 8 – Apr 11, 32 sap days3220022002: Mar 7 – Apr 10, 55 sap days5520012001: Mar 7 – Apr 5, 30 sap days3020002000: Feb 28 – Mar 5, 41 sap days4119991999: Feb 27 – Mar 30, 57 sap days5719981998: Feb 21 – Mar 25, 35 sap days3519971997: Mar 2 – Apr 2, 42 sap days4219961996: Mar 9 – Apr 12, 51 sap days5119951995: Feb 19 – Mar 26, 44 sap days4419941994: Mar 6 – Apr 8, 43 sap days4319931993: Mar 11 – Apr 14, 36 sap days3619921992: Mar 5 – Apr 9, 49 sap days4919911991: Feb 20 – Mar 26, 46 sap days46
Each bar runs from the season's opening signal to its closing signal, estimated from daily temperatures at Allegan. Dashed lines mark the typical dates. The right column counts freeze-thaw sap days from December through May.

Maple production

Allegan County in the Census of Agriculture

USDA counts maple operations every five years. In Allegan County the 2022 Census found 12 farms making syrup (-8% since 2017), with taps -79% and syrup output -71% over the same five years. That works out to about 0.24 gallons of syrup per tap in 2022 (0.18 in 2017). Among the 385 counties in this atlas, Allegan County ranks 279 by taps.

Allegan County maple production, 2017 and 2022 (USDA Census of Agriculture)
Census yearFarmsTapsGallons of syrupGal / tap
2022121,0572590.24
2017135,1369060.18

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 Allegan (653ft), 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 Michigan'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 — Michigan, 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

Allegan County sugaring questions

When should I tap maple trees in Allegan County, Michigan?
In a typical year the sap starts running around February 24 near Allegan and the season winds down around March 29. 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 1 and as late as Mar 15.
How much maple syrup does Allegan County produce?
The 2022 Census of Agriculture counted 12 maple operations in Allegan County with 1,057 taps producing 259 gallons of syrup, ranking 54 of 66 Michigan's counties with published tap counts.
How many sap days does Allegan County get in a season?
On average 41.9 freeze-thaw sap days from December through May at Allegan, 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 (62 sap days); the leanest was 2001 (30).
Where do these dates come from?
From 36 seasons of daily high and low temperatures at Allegan (PRISM 4-km grid), scored with the same freeze-thaw rule as our live forecast, then calibrated against USDA's reported season dates for Michigan. 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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