Vermont sap flow forecast

The next several days for Vermont's sugaring country, read the way a sugarmaker reads them: how cold the night gets, how warm the afternoon gets, and whether that adds up to a run. The season here usually opens early March.

Franklin County has 2.44 million of Vermont's 8.50 million taps (28.7%), the most of any county (2022 Census of Agriculture).

Forecast for St. Albans

Updated Sep 26, 2:21 AM EDT

It's the off-season. Sap needs freezing nights, and there are none in sight. Vermont's season usually opens around March 2 — 157 days from now.

No freeze-thaw days in the forecast

Blue = below 32°F · Amber = thaw · dashed line = freezing

  1. SunSep 27
    67°high
    53°low
    0h frozen
    24h thawed
    No freeze, no run

    Low of 53°F — trees need a hard freeze to reload. No freeze, no run.

  2. MonSep 28
    62°high
    53°low
    0h frozen
    24h thawed
    No freeze, no run

    Low of 53°F — trees need a hard freeze to reload. No freeze, no run.

  3. TueSep 29
    62°high
    53°low
    0h frozen
    24h thawed
    No freeze, no run

    Low of 53°F — trees need a hard freeze to reload. No freeze, no run.

  4. WedSep 30
    69°high
    52°low
    0h frozen
    24h thawed
    No freeze, no run

    Low of 52°F — trees need a hard freeze to reload. No freeze, no run.

  5. ThuOct 1
    71°high
    56°low
    0h frozen
    24h thawed
    No freeze, no run

    Low of 56°F — trees need a hard freeze to reload. No freeze, no run.

  6. FriOct 2
    68°high
    57°low
    0h frozen
    21h thawed
    No freeze, no run

    Low of 57°F — trees need a hard freeze to reload. No freeze, no run.

Data: National Weather Service. Verdicts use freeze-thaw thresholds from maple field research; your woods may run a little differently.

Lamoille County ranks second with 1.11 million taps (13.1%; 2022 Census of Agriculture).

Forecast for Morristown

Updated Sep 26, 2:21 AM EDT

It's the off-season. Sap needs freezing nights, and there are none in sight. Vermont's season usually opens around March 2 — 157 days from now.

No freeze-thaw days in the forecast

Blue = below 32°F · Amber = thaw · dashed line = freezing

  1. SunSep 27
    65°high
    51°low
    0h frozen
    24h thawed
    No freeze, no run

    Low of 51°F — trees need a hard freeze to reload. No freeze, no run.

  2. MonSep 28
    62°high
    51°low
    0h frozen
    24h thawed
    No freeze, no run

    Low of 51°F — trees need a hard freeze to reload. No freeze, no run.

  3. TueSep 29
    62°high
    50°low
    0h frozen
    24h thawed
    No freeze, no run

    Low of 50°F — trees need a hard freeze to reload. No freeze, no run.

  4. WedSep 30
    70°high
    49°low
    0h frozen
    24h thawed
    No freeze, no run

    Low of 49°F — trees need a hard freeze to reload. No freeze, no run.

  5. ThuOct 1
    72°high
    50°low
    0h frozen
    24h thawed
    No freeze, no run

    Low of 50°F — trees need a hard freeze to reload. No freeze, no run.

  6. FriOct 2
    69°high
    53°low
    0h frozen
    21h thawed
    No freeze, no run

    Low of 53°F — trees need a hard freeze to reload. No freeze, no run.

Data: National Weather Service. Verdicts use freeze-thaw thresholds from maple field research; your woods may run a little differently.

Orleans County in the Northeast Kingdom ranks third with 911,598 taps (10.7%; 2022 Census of Agriculture).

Forecast for Newport

Updated Sep 26, 2:21 AM EDT

It's the off-season. Sap needs freezing nights, and there are none in sight. Vermont's season usually opens around March 2 — 157 days from now.

No freeze-thaw days in the forecast

Blue = below 32°F · Amber = thaw · dashed line = freezing

  1. SunSep 27
    65°high
    52°low
    0h frozen
    24h thawed
    No freeze, no run

    Low of 52°F — trees need a hard freeze to reload. No freeze, no run.

  2. MonSep 28
    60°high
    52°low
    0h frozen
    24h thawed
    No freeze, no run

    Low of 52°F — trees need a hard freeze to reload. No freeze, no run.

  3. TueSep 29
    61°high
    52°low
    0h frozen
    24h thawed
    No freeze, no run

    Low of 52°F — trees need a hard freeze to reload. No freeze, no run.

  4. WedSep 30
    68°high
    51°low
    0h frozen
    24h thawed
    No freeze, no run

    Low of 51°F — trees need a hard freeze to reload. No freeze, no run.

  5. ThuOct 1
    70°high
    53°low
    0h frozen
    24h thawed
    No freeze, no run

    Low of 53°F — trees need a hard freeze to reload. No freeze, no run.

  6. FriOct 2
    67°high
    55°low
    0h frozen
    21h thawed
    No freeze, no run

    Low of 55°F — trees need a hard freeze to reload. No freeze, no run.

Data: National Weather Service. Verdicts use freeze-thaw thresholds from maple field research; your woods may run a little differently.

Somewhere else in Vermont?

Your sugarbush, your forecast

Hourly temperatures for your exact spot, turned into a day-by-day sap-run outlook. US and Canada.

Planning ahead? Typical tapping dates for Vermont →

Data & method

  1. National Weather Service API — NOAA National Weather Service
  2. Sap flow in sugar maple: timing and weather drivers (Frontiers in Agronomy, 2025) — de Lima Santos et al.
  3. Maple Sugaring Tips for Beginners and Backyard Maple Sugar Producers — UNH Extension
  4. North American Maple Syrup Producers Manual, 2nd ed. (Bulletin 856) — The Ohio State University Extension

Never miss the first run

LuckySap can ping you the evening before a strong sap day, then keeps your collections, sugar readings, and boils in one season log. Free on iPhone.

Download on the App Store