Pennsylvania · live outlook · refreshes every 3 h

Pennsylvania sap flow forecast

The next several days for Pennsylvania'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.

Pennsylvania highlighted on a map of the maple belt, with its forecast towns (Meyersdale, Meadville, Coudersport) marked — Pennsylvania in the maple beltDots: Meyersdale · Meadville · Coudersport

Season opens: Feb 25; typical
Closes: Mar 28; typical

107 days to the usual opening. When to tap in Pennsylvania

Meyersdale · Somerset County has 295,430 of Pennsylvania's 918,865 taps (32.2%), the most in the state (2022 Census of Agriculture).

Forecast for Meyersdale

Updated Nov 10, 7:05 AM EST

2 sap days in the next 6

freeze thaw 32°F

WedNov 11
37° / 61°
0h below · 24h above
No refreeze forecast
Low of 37°F — no refreeze is forecast. An earlier run may continue, then slow; temperature alone cannot rule out flow.
ThuNov 12
44° / 49°
0h below · 24h above
No refreeze forecast
Low of 44°F — no refreeze is forecast. An earlier run may continue, then slow; temperature alone cannot rule out flow.
FriNov 13
33° / 39°
2h below · 21h above
No refreeze forecast
Low of 33°F — no refreeze is forecast. An earlier run may continue, then slow; temperature alone cannot rule out flow.
SatNov 14
28° / 37°
11h below · 12h above
Maybe a light run
A cool 37°F high. The thaw may be too brief for much flow.
SunNov 15
28° / 41°
10h below · 13h above
Classic sap day
Low 28°F, high 41°F — nights in the 20s and days in the 40s: the textbook sap day.
MonNov 16
27° / 45°
Classic sap day
Low 27°F, high 45°F — nights in the 20s and days in the 40s: the textbook sap day.

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

Meadville · Crawford County in northwestern Pennsylvania ranks second with 153,895 taps (16.7%; 2022 Census of Agriculture).

Forecast for Meadville

Updated Nov 10, 3:02 AM EST

1 sap day in the next 6

freeze thaw 32°F

WedNov 11
36° / 56°
0h below · 24h above
No refreeze forecast
Low of 36°F — no refreeze is forecast. An earlier run may continue, then slow; temperature alone cannot rule out flow.
ThuNov 12
41° / 47°
0h below · 24h above
No refreeze forecast
Low of 41°F — no refreeze is forecast. An earlier run may continue, then slow; temperature alone cannot rule out flow.
FriNov 13
34° / 41°
0h below · 24h above
No refreeze forecast
Low of 34°F — no refreeze is forecast. An earlier run may continue, then slow; temperature alone cannot rule out flow.
SatNov 14
30° / 42°
5h below · 16h above
Sap likely
Freeze (30°F) then 42°F — a real freeze-thaw day.
SunNov 15
32° / 45°
0h below · 21h above
Run tapering
No overnight freeze (low 32°F). Yesterday's favorable weather may allow a run to continue, then slow without a refreeze.
MonNov 16
32° / 48°
No refreeze forecast
Low of 32°F — no refreeze is forecast. An earlier run may continue, then slow; temperature alone cannot rule out flow.

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

Coudersport · Potter and Tioga counties on the northern tier together hold 218,080 taps (23.7%; 2022 Census of Agriculture).

Forecast for Coudersport

Updated Nov 10, 7:05 AM EST

2 sap days in the next 6

freeze thaw 32°F

WedNov 11
34° / 52°
0h below · 24h above
No refreeze forecast
Low of 34°F — no refreeze is forecast. An earlier run may continue, then slow; temperature alone cannot rule out flow.
ThuNov 12
40° / 44°
0h below · 24h above
No refreeze forecast
Low of 40°F — no refreeze is forecast. An earlier run may continue, then slow; temperature alone cannot rule out flow.
FriNov 13
31° / 37°
6h below · 13h above
Maybe a light run
Only a light freeze (31°F). Branches may not freeze hard enough for a strong run.
SatNov 14
26° / 37°
12h below · 10h above
Maybe a light run
A cool 37°F high. The thaw may be too brief for much flow.
SunNov 15
27° / 41°
10h below · 12h above
Classic sap day
Low 27°F, high 41°F — nights in the 20s and days in the 40s: the textbook sap day.
MonNov 16
27° / 43°
Classic sap day
Low 27°F, high 43°F — nights in the 20s and days in the 40s: the textbook sap day.

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

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

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Data & method · 4

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

LuckySap · free on iPhone & Android

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 and Android.