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Ontario · maple atlas

Maple sugaring in Parry Sound, Ontario

Parry Sound is a district in Ontario. Ontario's census divisions are its counties, districts and regional municipalities. Statistics Canada's 2021 Census of Agriculture counted 37 farms reporting maple taps and 70,022 taps here. Around Parry Sound, sap usually runs from March 20 to April 17. Here's the long-run pattern, 35 seasons of sap weather, and the outlook this week.
Too early to tapAbout 164 days until the usual start.
Sap starts
Mar 20
weather estimate
Season ends
Apr 17
about 4 weeks
Sap days / season
30.8
1991–2025 average
Taps, 2021
70,022
#8 of 29 in ON

Sap-flow outlook at Parry Sound right now

Full Ontario forecast →

Forecast for Parry Sound, ON

Updated Oct 7, 11:00 AM EDT

Off-season for now. Sap needs freezing nights, and none are in sight. Parry Sound's season usually opens around March 20, which is 164 days away.

No freeze-thaw days in the forecast

freeze thaw 0 °C

  1. ThuOct 8
    7° / 15°
    No refreeze forecast
  2. FriOct 9
    6° / 13°
    No refreeze forecast
  3. SatOct 10
    2° / 20°
    No refreeze forecast
  4. SunOct 11
    13° / 24°
    No refreeze forecast
  5. MonOct 12
    11° / 18°
    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 Parry Sound

Freeze-thaw weather at Parry Sound peaks in the weeks of Mar 9 to Apr 13, which hold about 51% of a season's sap days. April is the busiest month. Typical dates are a weather estimate (no official season record for this province): the median of this division's own weather signals.
Typical season: Mar 20 – Apr 170246Week of Dec 1: 0.8 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: 0.9 sap days on averageWeek of Dec 29: 0.7 sap days on averageWeek of Jan 5: 0.6 sap days on averageWeek of Jan 12: 0.3 sap days on averageWeek of Jan 19: 0.5 sap days on averageWeek of Jan 26: 0.4 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: 1.0 sap days on averageWeek of Feb 23: 1.2 sap days on averageWeek of Mar 2: 1.6 sap days on averageWeek of Mar 9: 1.9 sap days on averageWeek of Mar 16: 2.3 sap days on averageWeek of Mar 23: 2.9 sap days on averageWeek of Mar 30: 3.0 sap days on averageWeek of Apr 6: 3.1 sap days on averageWeek of Apr 13: 2.4 sap days on averageWeek of Apr 20: 1.7 sap days on averageWeek of Apr 27: 1.3 sap days on averageWeek of May 4: 0.5 sap days on averageWeek of May 11: 0.2 sap days on averageWeek of May 18: 0.1 sap days on averageWeek of May 25: 0.0 sap days on averageDecJanFebMarAprMaytaps in ~Mar 20
Average number of freeze-thaw sap days in each week of the season at Parry Sound, 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 20; the middle half of seasons fell between Mar 13 and Mar 24. Earliest Feb 16 (2012), latest Apr 1 (1996).
Closing signal
Median Apr 17; middle half between Apr 12 and Apr 25. Earliest Mar 13 (2012), latest May 4 (1996).
Sap days by month
Dec13%Jan7%Feb11%Mar32%Apr33%May3%

35 seasons of sap weather

Parry Sound seasons, 1991–2025

The best sap year at Parry Sound was 1995 with 45 freeze-thaw days; the leanest was 2015 with 17. 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 21 – Apr 17, 26 sap days2620242024: Mar 4 – Apr 2, 30 sap days3020232023: Mar 13 – Apr 9, 34 sap days3420222022: Mar 21 – Apr 18, 27 sap days2720212021: Mar 5 – Apr 4, 25 sap days2520202020: Mar 24 – Apr 26, 42 sap days4220192019: Mar 26 – Apr 29, 24 sap days2420182018: Mar 30 – Apr 30, 23 sap days2320172017: Mar 11 – Apr 14, 30 sap days3020162016: Mar 19 – Apr 16, 31 sap days3120152015: Mar 25 – Apr 25, 17 sap days1720142014: Mar 27 – Apr 24, 21 sap days2120132013: Mar 23 – Apr 25, 30 sap days3020122012: Feb 16 – Mar 13, 44 sap days4420112011: Mar 23 – Apr 22, 24 sap days2420102010: Mar 2 – Mar 31, 28 sap days2820092009: Mar 17 – Apr 17, 28 sap days2820082008: Mar 31 – Apr 16, 20 sap days2020072007: Mar 21 – Apr 15, 26 sap days2620062006: Mar 23 – Apr 10, 25 sap days2520052005: Mar 14 – Apr 16, 35 sap days3520042004: Mar 16 – Apr 17, 35 sap days3520032003: Mar 21 – Apr 25, 29 sap days2920022002: Mar 13 – Apr 10, 36 sap days3620012001: Mar 19 – Apr 19, 28 sap days2820002000: Mar 4 – Apr 7, 39 sap days3919991999: Mar 12 – Apr 15, 44 sap days4419981998: Mar 9 – Apr 12, 34 sap days3419971997: Mar 27 – Apr 27, 37 sap days3719961996: Apr 1 – May 4, 34 sap days3419951995: Mar 15 – Apr 18, 45 sap days4519941994: Mar 20 – Apr 22, 37 sap days3719931993: Mar 20 – Apr 24, 28 sap days2819921992: Mar 26 – Apr 29, 31 sap days3119911991: Mar 9 – Apr 12, 30 sap days30
Each bar runs from the season's opening signal to its closing signal, estimated from daily Daymet temperatures at Parry Sound. Dashed lines mark the typical dates. The right column counts freeze-thaw sap days from December through May.

Maple production

Parry Sound 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 37 in Parry Sound, with 70,022 taps; in 2016, 48 farms and 94,218 taps. Among Ontario's 29 census divisions with a published tap count, Parry Sound ranks 8th, and 64th of the 94 in this atlas.

Over the five years the farm count changed −23% and taps −26%. 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.

Parry Sound maple production, 2016 and 2021 (Statistics Canada, Census of Agriculture)
Census yearFarms reporting tapsTaps
20213770,022
20164894,218

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 Parry Sound, the division's most populous municipality in the 2021 Census; the cell sits at 191 m (627 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. Ontario has no official season record, so the typical dates are a weather estimate. Production figures are copied from Statistics Canada as published. Full method, the Daymet checks and the Quebec validation → Run a sugarhouse here? Put this sap forecast on your own website →

Sources · 7

  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.Daymet: Daily Surface Weather Data on a 1-km Grid for North America, Version 4 R1 · ORNL DAAC
  4. 4.Sap flow in sugar maple: timing and weather drivers (Frontiers in Agronomy, 2025) · de Lima Santos et al.
  5. 5.2021 Census cartographic boundary files (census divisions, population centres) · Statistics Canada
  6. 6.Population and dwelling counts, 2021 Census (Tables 98-10-0002-01 and 98-10-0011-01) · Statistics Canada
Show 1 more
  1. 7.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.

FAQ

Parry Sound sugaring questions

When should I tap maple trees in Parry Sound, Ontario?
In a typical year the sap starts running around March 20 near Parry Sound and the season winds down around April 17. 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 16 and as late as Apr 1.
How much maple syrup does Parry Sound produce?
Statistics Canada doesn't publish syrup volume by census division. Its 2021 Census of Agriculture counted 37 farms reporting 70,022 maple taps in Parry Sound, number 8 of 29 Ontario divisions with a published count.
How many sap days does Parry Sound get in a season?
On average 30.8 freeze-thaw sap days from December through May at Parry Sound, of which about 12.9 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 1995 (45 sap days); the leanest was 2015 (17).
Where do these dates come from?
From 35 seasons of daily high and low temperatures at Parry Sound (Daymet 1-km grid), scored with the same freeze-thaw rule as our live forecast. Ontario has no official season record, so they are a weather estimate. 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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