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Quebec · maple atlas

Maple sugaring in L'Assomption, Quebec

L'Assomption is a regional county municipality (MRC) in Quebec. Statistics Canada's 2021 Census of Agriculture counted 10 farms reporting maple taps and 40,247 taps here. Around Repentigny, sap usually runs from March 10 to April 15. Here's the long-run pattern, 35 seasons of sap weather, and the outlook this week.
Too early to tapAbout 154 days until the usual start.
Sap starts
Mar 10
producers' record
Season ends
Apr 15
about 5 weeks
Sap days / season
25.2
1991–2025 average
Taps, 2021
40,247
#60 of 61 in QC

Sap-flow outlook at Repentigny right now

Full Quebec forecast →

Forecast for Repentigny, QC

Updated Oct 7, 11:30 AM EDT

Off-season for now. Sap needs freezing nights, and none are in sight. L'Assomption's season usually opens around March 10, which is 154 days away.

No freeze-thaw days in the forecast

freeze thaw 0 °C

  1. ThuOct 8
    11° / 16°
    No refreeze forecast
  2. FriOct 9
    8° / 14°
    No refreeze forecast
  3. SatOct 10
    2° / 14°
    No refreeze forecast
  4. SunOct 11
    7° / 23°
    No refreeze forecast
  5. MonOct 12
    12° / 17°
    No refreeze forecast
  6. TueOct 13
    10° / 14°
    No refreeze forecast

Data: Environment and Climate Change Canada. Verdicts use freeze-thaw thresholds from maple field research; your woods may run a little differently.

When the sap runs

The sugaring calendar at Repentigny

Freeze-thaw weather at Repentigny peaks in the weeks of Mar 9 to Apr 6, which hold about 48% of a season's sap days. March is the busiest month. Typical dates are anchored to producers' reported season in the region (Houle et al. 2015, 1999–2011): this division's weather signals, moved 6.8 days earlier for the opening and 1.4 for the closing, the average gap to that record. The spread and the year-by-year bars below are the unadjusted weather signal.
Typical season: Mar 10 – Apr 150246Week of Dec 1: 0.9 sap days on averageWeek of Dec 8: 1.0 sap days on averageWeek of Dec 15: 0.8 sap days on averageWeek of Dec 22: 0.6 sap days on averageWeek of Dec 29: 0.5 sap days on averageWeek of Jan 5: 0.5 sap days on averageWeek of Jan 12: 0.5 sap days on averageWeek of Jan 19: 0.4 sap days on averageWeek of Jan 26: 0.3 sap days on averageWeek of Feb 2: 0.6 sap days on averageWeek of Feb 9: 0.6 sap days on averageWeek of Feb 16: 0.8 sap days on averageWeek of Feb 23: 1.0 sap days on averageWeek of Mar 2: 1.5 sap days on averageWeek of Mar 9: 2.2 sap days on averageWeek of Mar 16: 2.0 sap days on averageWeek of Mar 23: 2.6 sap days on averageWeek of Mar 30: 2.8 sap days on averageWeek of Apr 6: 2.5 sap days on averageWeek of Apr 13: 1.6 sap days on averageWeek of Apr 20: 0.9 sap days on averageWeek of Apr 27: 0.5 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 ~Mar 10
Average number of freeze-thaw sap days in each week of the season at Repentigny, 1991–2025 (Daymet temperatures). A sap day is an overnight low under −1 °C (30.2 °F) followed by an afternoon high over +3 °C (37.4 °F). The shaded band is the typical season.

Year-to-year spread

Opening signal
Median Mar 17; the middle half of seasons fell between Mar 12 and Mar 21. Earliest Mar 2 (2010), latest Apr 8 (1998).
Closing signal
Median Apr 16; middle half between Apr 11 and Apr 18. Earliest Mar 30 (2010), latest Apr 25 (2003).
Sap days by month
Dec14%Jan8%Feb12%Mar36%Apr30%May1%

35 seasons of sap weather

L'Assomption seasons, 1991–2025

The best sap year at Repentigny was 1999 with 38 freeze-thaw days; the leanest was 2015 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 days20252025: Mar 13 – Apr 10, 17 sap days1720242024: Mar 4 – Apr 8, 30 sap days3020232023: Mar 12 – Apr 9, 33 sap days3320222022: Mar 15 – Apr 18, 27 sap days2720212021: Mar 17 – Apr 4, 22 sap days2220202020: Mar 12 – Apr 13, 34 sap days3420192019: Mar 21 – Apr 17, 20 sap days2020182018: Mar 23 – Apr 23, 34 sap days3420172017: Mar 11 – Apr 9, 12 sap days1220162016: Mar 17 – Apr 16, 34 sap days3420152015: Apr 2 – Apr 16, 11 sap days1120142014: Mar 28 – Apr 20, 19 sap days1920132013: Mar 16 – Apr 15, 33 sap days3320122012: Mar 12 – Apr 4, 28 sap days2820112011: Mar 19 – Apr 22, 21 sap days2120102010: Mar 2 – Mar 30, 20 sap days2020092009: Mar 15 – Apr 19, 32 sap days3220082008: Mar 19 – Apr 16, 17 sap days1720072007: Mar 17 – Apr 11, 24 sap days2420062006: Mar 8 – Apr 9, 20 sap days2020052005: Mar 14 – Apr 16, 25 sap days2520042004: Mar 18 – Apr 17, 26 sap days2620032003: Mar 21 – Apr 25, 20 sap days2020022002: Mar 12 – Apr 11, 27 sap days2720012001: Mar 22 – Apr 20, 26 sap days2620002000: Mar 11 – Apr 15, 30 sap days3019991999: Mar 13 – Apr 12, 38 sap days3819981998: Apr 8 – Apr 12, 18 sap days1819971997: Mar 25 – Apr 16, 26 sap days2619961996: Mar 19 – Apr 16, 27 sap days2719951995: Mar 16 – Apr 18, 32 sap days3219941994: Mar 20 – Apr 23, 27 sap days2719931993: Mar 22 – Apr 7, 19 sap days1919921992: Mar 22 – Apr 17, 24 sap days2419911991: Mar 12 – Apr 14, 30 sap days30
Each bar runs from the season's opening signal to its closing signal, estimated from daily Daymet temperatures at Repentigny. Dashed lines mark the typical dates. The right column counts freeze-thaw sap days from December through May.

Maple production

L'Assomption in the Census of Agriculture

Statistics Canada counts the farms that report maple taps in its Census of Agriculture every five years. In 2021 it counted 10 in L'Assomption, with 40,247 taps; in 2016, 15 farms and 42,115 taps. Among Quebec's 61 census divisions with a published tap count, L'Assomption ranks 60th, and 78th of the 94 in this atlas.

Over the five years the farm count changed −33% and taps −4%. Statistics Canada cautions that 2021 and 2016 are not strictly comparable: the census-farm definition changed in 2021, and farms were assigned to their main location more strictly.

Statistics Canada doesn't publish syrup volume by census division, so the Canadian pages show farms and taps, not gallons or litres.

L'Assomption maple production, 2016 and 2021 (Statistics Canada, Census of Agriculture)
Census yearFarms reporting tapsTaps
20211040,247E
20161542,115
  • E Statistics Canada quality grade: use with caution.

A separate, newer source

PPAQ regional fact sheet, 2026

The Producteurs et productrices acéricoles du Québec (PPAQ) publish a fact sheet for each sugaring region, with figures for every MRC. These are from the 2026 Lanaudière sheet. They count enterprises registered under the joint marketing plan, by where the sugarbush is; the census above counts 2021 farms by their main location. The two sit side by side here and are never added together.

Enterprises
8
under the joint marketing plan
Taps
50,927
as printed
Annual production
241,394 lb
estimate, pounds of syrup
Value
$808,669
Canadian dollars

Taps by forest ownership

Private forest 100%Public forest 0%

Nearby

Neighboring maple divisions

Distances are between reference towns; typical dates are each division's own estimate.

About these numbers

The season dates are estimated from 35 seasons of daily high and low temperatures for the Daymet 1-km grid cell at Repentigny, the division's most populous municipality in the 2021 Census; the cell sits at 10 m (33 ft). Each day is scored with the same freeze-thaw rule as our live forecast: a sap day is an overnight low under −1 °C (30.2 °F) followed by an afternoon high over +3 °C (37.4 °F). A season's closing signal is the last sap day before accumulated warmth reaches a threshold, and the opening signal sits 35 days before that, never earlier than the first real freeze-thaw week. The rule was calibrated on 117 state-seasons of USDA-reported dates in the US and is applied here unchanged. In Quebec it reproduces the pattern between regions in producers' reported seasons (Houle et al. 2015), and the typical dates are anchored to that record. Production figures are copied from Statistics Canada as published; the PPAQ figures, from its 2026 regional fact sheet, are shown separately. Full method, the Daymet checks and the Quebec validation → Run a sugarhouse here? Put this sap forecast on your own website →

Sources · 9

  1. 1.Maple taps, Census of Agriculture, 2021 (Table 32-10-0362-01) · Statistics Canada
  2. 2.Maple taps, Census of Agriculture, 2011 and 2016 (Table 32-10-0423-01) · Statistics Canada
  3. 3.Fiche région 2026 : Lanaudière · Producteurs et productrices acéricoles du Québec
  4. 4.Daymet: Daily Surface Weather Data on a 1-km Grid for North America, Version 4 R1 · ORNL DAAC
  5. 5.Impacts of climate change on the timing of the production season of maple syrup in eastern Canada (PLOS ONE 10(12): e0144844, 2015) · Houle et al.
  6. 6.Sap flow in sugar maple: timing and weather drivers (Frontiers in Agronomy, 2025) · de Lima Santos et al.
Show 3 more
  1. 7.2021 Census cartographic boundary files (census divisions, population centres) · Statistics Canada
  2. 8.Population and dwelling counts, 2021 Census (Tables 98-10-0002-01 and 98-10-0011-01) · Statistics Canada
  3. 9.GeoNames geographical database (CA) · GeoNames

Licences and attribution

  • Adapted from Statistics Canada, Census of Agriculture 2021 and 2016 (Tables 32-10-0362-01 and 32-10-0423-01), 2021 Census population and dwelling counts (Tables 98-10-0002-01 and 98-10-0011-01) and 2021 Census cartographic boundary files. This does not constitute an endorsement by Statistics Canada of this product.
  • Contains information licensed under the Open Government Licence – Canada.
  • Thornton, M.M., R. Shrestha, Y. Wei, P.E. Thornton, S-C. Kao, and B.E. Wilson. 2022. Daymet: Daily Surface Weather Data on a 1-km Grid for North America, Version 4 R1. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/2129
  • Place coordinates: GeoNames (geonames.org), CC BY 4.0.
  • Québec MRC figures: Producteurs et productrices acéricoles du Québec, Fiches région 2026 (production estimates from Groupe AGÉCO).

FAQ

L'Assomption sugaring questions

When should I tap maple trees in L'Assomption, Quebec?
In a typical year the sap starts running around March 10 near Repentigny and the season winds down around April 15. Have your taps in a day or two before the first forecast string of nights below −1 °C and days above +3 °C. In the past 35 seasons the weather signal came as early as Mar 2 and as late as Apr 8.
How much maple syrup does L'Assomption produce?
Statistics Canada doesn't publish syrup volume by census division. Its 2021 Census of Agriculture counted 10 farms reporting 40,247 maple taps in L'Assomption, number 60 of 61 Quebec divisions with a published count. Separately, the PPAQ's 2026 fact sheet for the Lanaudière region estimates annual production at 241,394 lb of syrup from 50,927 taps.
How many sap days does L'Assomption get in a season?
On average 25.2 freeze-thaw sap days from December through May at Repentigny, of which about 10.5 are textbook days with a night between about −7 and −2 °C and a day between 4 and 9 °C. The best season since 1991 was 1999 (38 sap days); the leanest was 2015 (11).
Where do these dates come from?
From 35 seasons of daily high and low temperatures at Repentigny (Daymet 1-km grid), scored with the same freeze-thaw rule as our live forecast. In Quebec they are anchored to producers' reported season in the region (Houle et al. 2015, 1999–2011). They describe a typical year at one point in the division; your sugarbush, slope and elevation can shift them by days.

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