Skip to content
LuckySap
Get the app
Minnesota · county maple atlas

Maple sugaring in Morrison County, Minnesota

Morrison County had 10 maple operations and 764 taps in the 2022 Census. Around Little Falls, sap usually runs from March 6 to April 6. Here's the long-run pattern, 36 seasons of sap weather, and the outlook this week.
Too early to tapAbout 151 days until the usual start.
Sap starts
Mar 6
typical year
Season ends
Apr 6
about 4 weeks
Sap days / season
34.8
1991–2026 average
Taps, 2022
764
#17 of 41 in MN

Sap-flow outlook at Little Falls right now

Full Minnesota forecast →

Forecast for Little Falls, MN

Updated Oct 6, 6:44 AM EDT

Off-season for now. Sap needs freezing nights, and none are in sight. Morrison County's season usually opens around March 6, which is 151 days away.

No freeze-thaw days in the forecast

freeze thaw 32°F

  1. WedOct 7
    48° / 69°

    0h below · 24h above

    No refreeze forecast
  2. ThuOct 8
    41° / 63°

    0h below · 24h above

    No refreeze forecast
  3. FriOct 9
    41° / 66°

    0h below · 24h above

    No refreeze forecast
  4. SatOct 10
    53° / 76°

    0h below · 24h above

    No refreeze forecast
  5. SunOct 11
    57° / 67°

    0h below · 24h above

    No refreeze forecast
  6. MonOct 12
    47° / 54°
    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 Little Falls

Freeze-thaw weather at Little Falls peaks in the weeks of Mar 9 to Apr 13, which hold about 52% of a season's sap days. March is the busiest month.
Typical season: Mar 6 – Apr 60246Week of Dec 1: 1.3 sap days on averageWeek of Dec 8: 1.2 sap days on averageWeek of Dec 15: 0.8 sap days on averageWeek of Dec 22: 0.7 sap days on averageWeek of Dec 29: 0.3 sap days on averageWeek of Jan 5: 0.5 sap days on averageWeek of Jan 12: 0.3 sap days on averageWeek of Jan 19: 0.3 sap days on averageWeek of Jan 26: 0.8 sap days on averageWeek of Feb 2: 1.0 sap days on averageWeek of Feb 9: 1.0 sap days on averageWeek of Feb 16: 1.3 sap days on averageWeek of Feb 23: 1.5 sap days on averageWeek of Mar 2: 1.9 sap days on averageWeek of Mar 9: 2.4 sap days on averageWeek of Mar 16: 3.1 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: 3.2 sap days on averageWeek of Apr 13: 2.7 sap days on averageWeek of Apr 20: 2.0 sap days on averageWeek of Apr 27: 1.3 sap days on averageWeek of May 4: 0.6 sap days on averageWeek of May 11: 0.3 sap days on averageWeek of May 18: 0.0 sap days on averageWeek of May 25: 0.0 sap days on averageDecJanFebMarAprMaytaps in ~Mar 6
Average number of freeze-thaw sap days in each week of the season at Little Falls, 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 16; the middle half of seasons fell between Mar 10 and Mar 22. Earliest Feb 16 (2012), latest Apr 4 (2013).
Closing signal
Median Apr 15; middle half between Apr 9 and Apr 23. Earliest Mar 15 (2012), latest May 4 (2013).
Sap days by month
Dec11%Jan6%Feb13%Mar34%Apr32%May4%

36 seasons of sap weather

Morrison County seasons, 1991–2026

The best sap year at Little Falls was 2021 with 55 freeze-thaw days; the leanest was 2014 with 20. 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: Mar 11 – Apr 11, 42 sap days4220252025: Mar 13 – Apr 12, 37 sap days3720242024: Mar 8 – Apr 7, 45 sap days4520232023: Mar 29 – Apr 26, 23 sap days2320222022: Mar 30 – Apr 28, 33 sap days3320212021: Mar 4 – Apr 2, 55 sap days5520202020: Mar 23 – Apr 23, 39 sap days3920192019: Mar 21 – Apr 23, 36 sap days3620182018: Mar 30 – Apr 28, 39 sap days3920172017: Mar 3 – Apr 7, 32 sap days3220162016: Mar 11 – Apr 14, 33 sap days3320152015: Mar 9 – Apr 12, 32 sap days3220142014: Mar 28 – Apr 22, 20 sap days2020132013: Apr 4 – May 4, 25 sap days2520122012: Feb 16 – Mar 15, 37 sap days3720112011: Mar 22 – Apr 24, 31 sap days3120102010: Feb 28 – Mar 29, 27 sap days2720092009: Mar 18 – Apr 15, 25 sap days2520082008: Mar 28 – May 1, 33 sap days3320072007: Mar 16 – Apr 16, 32 sap days3220062006: Mar 10 – Apr 9, 25 sap days2520052005: Mar 5 – Apr 8, 37 sap days3720042004: Mar 12 – Apr 15, 38 sap days3820032003: Mar 22 – Apr 9, 26 sap days2620022002: Mar 14 – Apr 10, 46 sap days4620012001: Mar 22 – Apr 24, 24 sap days2420002000: Feb 24 – Mar 31, 52 sap days5219991999: Mar 11 – Apr 13, 49 sap days4919981998: Mar 17 – Apr 5, 27 sap days2719971997: Mar 21 – Apr 24, 33 sap days3319961996: Mar 29 – May 3, 39 sap days3919951995: Mar 16 – Apr 20, 33 sap days3319941994: Mar 15 – Apr 13, 39 sap days3919931993: Mar 20 – Apr 21, 34 sap days3419921992: Mar 20 – Apr 18, 36 sap days3619911991: Mar 2 – Apr 1, 40 sap days40
Each bar runs from the season's opening signal to its closing signal, estimated from daily temperatures at Little Falls. Dashed lines mark the typical dates. The right column counts freeze-thaw sap days from December through May.

Maple production

Morrison County in the Census of Agriculture

USDA counts maple operations every five years. In Morrison County the 2022 Census found 10 farms making syrup (+67% since 2017), with taps +82% and syrup output +225% over the same five years. That works out to about 0.37 gallons of syrup per tap in 2022 (0.21 in 2017). Among the 385 counties in this atlas, Morrison County ranks 293 by taps.

Morrison County maple production, 2017 and 2022 (USDA Census of Agriculture)
Census yearFarmsTapsGallons of syrupGal / tap
2022107642830.37
20176419870.21

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 Little Falls (1,106ft), 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 Minnesota's USDA record (3 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 — Minnesota, 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

Morrison County sugaring questions

When should I tap maple trees in Morrison County, Minnesota?
In a typical year the sap starts running around March 6 near Little Falls 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 16 and as late as Apr 4.
How much maple syrup does Morrison County produce?
The 2022 Census of Agriculture counted 10 maple operations in Morrison County with 764 taps producing 283 gallons of syrup, ranking 17 of 41 Minnesota's counties with published tap counts.
How many sap days does Morrison County get in a season?
On average 34.8 freeze-thaw sap days from December through May at Little Falls, of which about 9.1 are textbook days with a night in the 20s and a day in the 40s. The best season since 1991 was 2021 (55 sap days); the leanest was 2014 (20).
Where do these dates come from?
From 36 seasons of daily high and low temperatures at Little Falls (PRISM 4-km grid), scored with the same freeze-thaw rule as our live forecast, then calibrated against USDA's reported season dates for Minnesota. They describe a typical year at one point in the county; your sugarbush, slope and elevation can shift them by days.

LuckySap · free on iPhone & Android

Get a heads-up when the sap will run in Morrison County

LuckySap watches the forecast for your trees and can ping you the night before a strong sap day, then keeps every collection and boil in one season log. Free on iPhone and Android.

Download on the App StoreGet it on Google Play