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Quebec · maple atlas

Maple sugaring in Rouville, Quebec

Rouville is a regional county municipality (MRC) in Quebec. Statistics Canada's 2021 Census of Agriculture counted 45 farms reporting maple taps and 158,243 taps here. Around Marieville, sap usually runs from March 7 to April 15. Here's the long-run pattern, 35 seasons of sap weather, and the outlook this week.
Too early to tapAbout 151 days until the usual start.
Sap starts
Mar 7
producers' record
Season ends
Apr 15
about 6 weeks
Sap days / season
26.3
1991–2025 average
Taps, 2021
158,243
#44 of 61 in QC

Sap-flow outlook at Marieville right now

Full Quebec forecast →

Forecast for Marieville, QC

Updated Oct 7, 11:30 AM EDT

Off-season for now. Sap needs freezing nights, and none are in sight. Rouville's season usually opens around March 7, which is 151 days away.

No freeze-thaw days in the forecast

freeze thaw 0 °C

  1. ThuOct 8
    10° / 16°
    No refreeze forecast
  2. FriOct 9
    9° / 12°
    No refreeze forecast
  3. SatOct 10
    3° / 14°
    No refreeze forecast
  4. SunOct 11
    9° / 23°
    No refreeze forecast
  5. MonOct 12
    13° / 18°
    No refreeze forecast
  6. TueOct 13
    11° / 15°
    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 Marieville

Freeze-thaw weather at Marieville peaks in the weeks of Mar 9 to Apr 13, which hold about 50% 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 7 – Apr 150246Week of Dec 1: 1.2 sap days on averageWeek of Dec 8: 1.1 sap days on averageWeek of Dec 15: 0.9 sap days on averageWeek of Dec 22: 0.8 sap days on averageWeek of Dec 29: 0.6 sap days on averageWeek of Jan 5: 0.6 sap days on averageWeek of Jan 12: 0.6 sap days on averageWeek of Jan 19: 0.5 sap days on averageWeek of Jan 26: 0.5 sap days on averageWeek of Feb 2: 0.7 sap days on averageWeek of Feb 9: 0.7 sap days on averageWeek of Feb 16: 0.9 sap days on averageWeek of Feb 23: 1.1 sap days on averageWeek of Mar 2: 1.2 sap days on averageWeek of Mar 9: 1.8 sap days on averageWeek of Mar 16: 1.8 sap days on averageWeek of Mar 23: 2.5 sap days on averageWeek of Mar 30: 2.7 sap days on averageWeek of Apr 6: 2.5 sap days on averageWeek of Apr 13: 1.7 sap days on averageWeek of Apr 20: 0.9 sap days on averageWeek of Apr 27: 0.6 sap days on averageWeek of May 4: 0.1 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 7
Average number of freeze-thaw sap days in each week of the season at Marieville, 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 14; the middle half of seasons fell between Mar 10 and Mar 21. Earliest Feb 27 (2024), latest Apr 9 (2003).
Closing signal
Median Apr 16; middle half between Apr 9 and Apr 17. Earliest Mar 28 (2010), latest Apr 27 (1997).
Sap days by month
Dec16%Jan9%Feb13%Mar32%Apr28%May1%

35 seasons of sap weather

Rouville seasons, 1991–2025

The best sap year at Marieville was 1999 with 39 freeze-thaw days; the leanest was 2003 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 11 – Apr 14, 26 sap days2620242024: Feb 27 – Apr 3, 31 sap days3120232023: Mar 11 – Apr 9, 33 sap days3320222022: Mar 10 – Apr 5, 26 sap days2620212021: Mar 3 – Apr 4, 22 sap days2220202020: Mar 9 – Apr 13, 38 sap days3820192019: Mar 19 – Apr 17, 27 sap days2720182018: Mar 22 – Apr 23, 36 sap days3620172017: Mar 9 – Apr 9, 17 sap days1720162016: Mar 13 – Apr 16, 36 sap days3620152015: Apr 2 – Apr 16, 13 sap days1320142014: Mar 18 – Apr 20, 18 sap days1820132013: Mar 14 – Apr 15, 35 sap days3520122420112011: Mar 15 – Apr 16, 19 sap days1920102010: Mar 2 – Mar 28, 20 sap days2020092009: Mar 13 – Apr 16, 27 sap days2720082008: Mar 16 – Apr 16, 22 sap days2220072007: Mar 16 – Apr 11, 28 sap days2820062006: Mar 7 – Apr 9, 23 sap days2320052005: Mar 14 – Apr 16, 25 sap days2520042004: Mar 16 – Apr 17, 25 sap days2520032003: Apr 9 – Apr 18, 11 sap days1120022002: Mar 11 – Apr 11, 26 sap days2620012001: Mar 22 – Apr 20, 26 sap days2620002000: Feb 28 – Apr 4, 32 sap days3219991999: Mar 11 – Apr 12, 39 sap days3919981998: Apr 8 – Apr 13, 20 sap days2019971997: Mar 23 – Apr 27, 26 sap days2619961996: Mar 18 – Apr 16, 27 sap days2719951995: Mar 13 – Apr 17, 35 sap days3519941994: Mar 21 – Apr 23, 24 sap days2419931993: Mar 24 – Apr 8, 24 sap days2419921992: Mar 22 – Apr 17, 26 sap days2619911991: Mar 7 – Apr 3, 33 sap days33
Each bar runs from the season's opening signal to its closing signal, estimated from daily Daymet temperatures at Marieville. Dashed lines mark the typical dates. The right column counts freeze-thaw sap days from December through May.

Maple production

Rouville 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 45 in Rouville, with 158,243 taps; in 2016, 51 farms and 136,700 taps. Among Quebec's 61 census divisions with a published tap count, Rouville ranks 44th, and 52nd of the 94 in this atlas.

Over the five years the farm count changed −12% and taps +16%. 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.

Rouville maple production, 2016 and 2021 (Statistics Canada, Census of Agriculture)
Census yearFarms reporting tapsTaps
202145158,243
201651136,700

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 Montérégie-Est 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
56
under the joint marketing plan
Taps
255,241
as printed
Annual production
1.2 million lb
estimate, pounds of syrup
Value
$4.3 million
Canadian dollars

Taps by forest ownership

Private forest 100%Public forest 0%

  • Figures in millions are rounded to a tenth, as PPAQ printed them.
  • Annual production is PPAQ's estimate (Groupe AGÉCO's yield estimate applied to the taps), not a measured harvest. Montérégie-Est sheet (PDF, French)

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 Marieville, the division's most populous municipality in the 2021 Census; the cell sits at 33 m (108 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 : Montérégie-Est · 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

Rouville sugaring questions

When should I tap maple trees in Rouville, Quebec?
In a typical year the sap starts running around March 7 near Marieville 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 Feb 27 and as late as Apr 9.
How much maple syrup does Rouville produce?
Statistics Canada doesn't publish syrup volume by census division. Its 2021 Census of Agriculture counted 45 farms reporting 158,243 maple taps in Rouville, number 44 of 61 Quebec divisions with a published count. Separately, the PPAQ's 2026 fact sheet for the Montérégie-Est region estimates annual production at 1.2 million lb of syrup from 255,241 taps.
How many sap days does Rouville get in a season?
On average 26.3 freeze-thaw sap days from December through May at Marieville, of which about 10 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 (39 sap days); the leanest was 2003 (11).
Where do these dates come from?
From 35 seasons of daily high and low temperatures at Marieville (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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