Observed 3:10 AM EDT at KSEG

Shamokin Dam, PA weather

Clear and 34°1°.

Forecasts agree

Now 34°1°

Clear

Wind: Calm; Light through 3 PM
Dew point: 34°1°; Dry, static shocks likely
Humidity: 100%; Air 34°1°, dew point 34°1° · frost likely
UV index: 0Low; Moderate 11 AM–4 PM · peak 4
Pressure: 30.5 inHg1033 hPa; Rising slowly · +0.02 inHg+0.6 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

19°10° cooler than this time yesterday (52°11° then, 33°1° now)

Good hours for

Above 50°10° today by noon
High 61°16° today at 5 PM
Below 50°10° tonight after 9 PM
Below freezing tomorrow 7–9 AM (low 32°0°)
Fog tomorrow night from midnight

TonightNear 35°2° · Clear
This morningUp to 49°9° by 11 AM · Clear
This afternoonUp to 61°16° by 5 PM · Clear
TonightDown to 34°1° by 5 AM · Clear
Tomorrow morningUp to 48°9° by 11 AM · freezing, low 32°0° · Clear
Tomorrow afternoonUp to 63°17° by 5 PM · Clear
Tomorrow nightDown to 39°4° by 2 AM · Clear

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 3a	Clear	35°2° (likely 33°1° to 41°5°)	35°2°	0%	0 mph0 km/h, gusts 3 mph5 km/h	96%	6%	0
Sat 4a	Clear	35°2° (likely 32°0° to 40°4°)	35°2°	0%	0 mph0 km/h, gusts 2 mph3 km/h	96%	17%	0
Sat 5a	Clear	35°2° (likely 32°0° to 39°4°)	35°2°	0%	0 mph0 km/h, gusts 2 mph3 km/h	96%	20%	0
Sat 6a	Clear	34°1° (likely 31°−1° to 39°4°)	34°1°	0%	0 mph0 km/h, gusts 2 mph3 km/h	96%	20%	0
Sat 7a	Sunny	33°1° (likely 31°−1° to 38°3°)	33°1°	0%	0 mph0 km/h, gusts 2 mph3 km/h	96%	13%	0
Sat 8a	Sunny	33°1° (likely 31°−1° to 38°3°)	33°1°	0%	0 mph0 km/h, gusts 2 mph4 km/h	96%	12%	0
Sat 9a	Sunny	37°3° (likely 35°2° to 42°6°)	37°3°	0%	0 mph0 km/h, gusts 2 mph4 km/h	96%	10%	1
Sat 10a	Sunny	43°6° (likely 43°6° to 48°9°)	43°6°	0%	0 mph0 km/h, gusts 2 mph3 km/h	82%	0%	2
Sat 11a	Sunny	49°9° (likely 49°9° to 53°12°)	49°9°	0%	0 mph0 km/h, gusts 4 mph6 km/h	68%	0%	3
Sat 12p	Sunny	53°12° (likely 53°12° to 56°13°)	53°12°	0%	0 mph0 km/h, gusts 6 mph9 km/h	54%	0%	3
Sat 1p	Sunny	56°13° (likely 55°13° to 58°14°)	56°13°	0%	0 mph0 km/h, gusts 7 mph12 km/h	49%	0%	4
Sat 2p	Sunny	58°14° (likely 57°14° to 59°15°)	58°14°	0%	1 mph2 km/h from S, gusts 7 mph11 km/h	44%	0%	4
Sat 3p	Sunny	60°16° (likely 58°14° to 60°16°)	60°16°	0%	1 mph2 km/h from S, gusts 6 mph10 km/h	39%	0%	3
Sat 4p	Sunny	60°16° (likely 58°14° to 60°16°)	60°16°	0%	0 mph0 km/h, gusts 5 mph9 km/h	36%	0%	2
Sat 5p	Sunny	61°16° (likely 57°14° to 61°16°)	61°16°	0%	0 mph0 km/h, gusts 5 mph8 km/h	31%	0%	1
Sat 6p	Clear	58°14° (likely 53°12° to 58°14°)	58°14°	0%	0 mph0 km/h, gusts 4 mph6 km/h	40%	0%	0
Sat 7p	Clear	53°12° (likely 49°9° to 53°12°)	53°12°	0%	0 mph0 km/h, gusts 1 mph2 km/h	52%	0%	0
Sat 8p	Clear	51°11° (likely 46°8° to 51°11°)	51°11°	0%	0 mph0 km/h, gusts 2 mph3 km/h	56%	0%	0
Sat 9p	Clear	45°7° (likely 43°6° to 47°8°)	45°7°	0%	0 mph0 km/h, gusts 3 mph5 km/h	73%	0%	0
Sat 10p	Clear	43°6° (likely 41°5° to 45°7°)	43°6°	0%	0 mph0 km/h, gusts 3 mph4 km/h	79%	0%	0
Sat 11p	Clear	41°5° (likely 39°4° to 44°7°)	41°5°	0%	0 mph0 km/h, gusts 2 mph3 km/h	85%	0%	0
Sun 12a	Clear	40°4° (likely 38°3° to 44°7°)	40°4°	0%	0 mph0 km/h, gusts 3 mph4 km/h	85%	0%	0
Sun 1a	Clear	38°3° (likely 37°3° to 43°6°)	38°3°	0%	0 mph0 km/h, gusts 2 mph4 km/h	89%	0%	0
Sun 2a	Clear	37°3° (likely 36°2° to 42°6°)	37°3°	0%	0 mph0 km/h, gusts 2 mph4 km/h	92%	0%	0
Sun 3a	Clear	36°2° (likely 34°1° to 41°5°)	36°2°	0%	0 mph0 km/h, gusts 2 mph3 km/h	92%	7%	0
Sun 4a	Clear	35°2° (likely 33°1° to 40°4°)	35°2°	0%	0 mph0 km/h, gusts 2 mph2 km/h	96%	11%	0
Sun 5a	Clear	34°1° (likely 33°1° to 40°4°)	34°1°	0%	0 mph0 km/h, gusts 1 mph2 km/h	96%	12%	0
Sun 6a	Clear	33°1° (likely 32°0° to 39°4°)	33°1°	0%	0 mph0 km/h, gusts 1 mph2 km/h	96%	12%	0
Sun 7a	Sunny	32°0° (likely 32°0° to 38°3°)	32°0°	0%	0 mph0 km/h, gusts 1 mph1 km/h	100%	15%	0
Sun 8a	Sunny	32°0° (likely 32°0° to 38°3°)	32°0°	0%	0 mph0 km/h, gusts 1 mph1 km/h	100%	16%	0
Sun 9a	Sunny	36°2° (likely 36°2° to 42°6°)	36°2°	0%	0 mph0 km/h, gusts 1 mph2 km/h	100%	15%	1
Sun 10a	Sunny	43°6° (likely 43°6° to 48°9°)	43°6°	0%	0 mph0 km/h, gusts 1 mph2 km/h	86%	1%	2
Sun 11a	Sunny	48°9° (likely 48°9° to 53°12°)	48°9°	0%	0 mph0 km/h, gusts 4 mph7 km/h	74%	2%	3
Sun 12p	Sunny	53°12° (likely 53°12° to 56°13°)	53°12°	0%	0 mph0 km/h, gusts 6 mph9 km/h	59%	2%	3
Sun 1p	Sunny	57°14° (likely 57°14° to 58°14°)	57°14°	0%	1 mph2 km/h from SW, gusts 7 mph11 km/h	53%	2%	4
Sun 2p	Sunny	60°16° (likely 58°14° to 60°16°)	60°16°	0%	2 mph3 km/h from S, gusts 8 mph14 km/h	47%	2%	4
Sun 3p	Sunny	61°16° (likely 59°15° to 61°16°)	61°16°	0%	2 mph3 km/h from S, gusts 9 mph15 km/h	44%	3%	3
Sun 4p	Sunny	62°17° (likely 60°16° to 62°17°)	62°17°	0%	2 mph3 km/h from S, gusts 10 mph16 km/h	41%	2%	2
Sun 5p	Sunny	63°17° (likely 59°15° to 63°17°)	63°17°	0%	1 mph2 km/h from S, gusts 10 mph16 km/h	38%	1%	1
Sun 6p	Clear	59°15° (likely 54°12° to 59°15°)	59°15°	0%	1 mph2 km/h from S, gusts 6 mph10 km/h	47%	0%	0
Sun 7p	Clear	54°12° (likely 50°10° to 54°12°)	54°12°	0%	0 mph0 km/h, gusts 5 mph8 km/h	61%	0%	0
Sun 8p	Clear	52°11° (likely 47°8° to 52°11°)	52°11°	0%	0 mph0 km/h, gusts 4 mph6 km/h	66%	0%	0
Sun 9p	Clear	47°8° (likely 42°6° to 47°8°)	47°8°	0%	0 mph0 km/h, gusts 3 mph4 km/h	83%	0%	0
Sun 10p	Clear	44°7° (likely 40°4° to 46°8°)	44°7°	0%	0 mph0 km/h, gusts 2 mph4 km/h	93%	1%	0
Sun 11p	Clear	43°6° (likely 38°3° to 45°7°)	43°6°	0%	0 mph0 km/h, gusts 3 mph4 km/h	93%	3%	0
Mon 12a	Fog	41°5° (likely 36°2° to 44°7°)	41°5°	0%	0 mph0 km/h, gusts 2 mph4 km/h	96%	15%	0
Mon 1a	Fog	40°4° (likely 35°2° to 44°7°)	40°4°	0%	0 mph0 km/h, gusts 2 mph4 km/h	96%	17%	0
Mon 2a	Fog	39°4° (likely 33°1° to 43°6°)	39°4°	0%	0 mph0 km/h, gusts 2 mph4 km/h	96%	20%	0

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 24. Fog. High 61°16°, low 33°1°. Typical 61°16° / 38°3°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 33°1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 61°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 51°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 34°1°
  Dry
Official NWS forecast
Today: Patchy fog before 10am. Sunny, with a high near 61. Southwest wind around 1 mph.
Tonight: Patchy fog. Mostly clear, with a low around 33. Wind around 0 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
58°14°–61°16°
Low, likely
31°−1°–38°3°
Typical high / low
61°16° / 38°3°
Wind
5 mph8 km/h, gusts 10 mph16 km/h
UV peak
4
Tomorrow, Oct 25. Fog. High 63°17°, low 34°1°. Typical 60°16° / 38°3°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 32°0°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 37°3°
  Dry
Official NWS forecast
Day: Areas of fog before 10am. Sunny, with a high near 63. Southwest wind around 2 mph.
Night: Areas of fog after 11pm. Mostly clear, with a low around 34. West wind around 1 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
60°16°–63°17°
Low, likely
31°−1°–37°3°
Typical high / low
60°16° / 38°3°
Wind
8 mph12 km/h
UV peak
4
Monday, Oct 26. Fog. High 68°20°, low 41°5°. Typical 60°16° / 37°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 36°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 45°7°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Areas of fog before 10am. Sunny, with a high near 68.
Night: Mostly clear, with a low around 41.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–69°21°
Low, likely
31°−1°–41°5°
Typical high / low
60°16° / 37°3°
Wind
6 mph10 km/h, gusts 12 mph19 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 60°16°, low 35°2°. Typical 60°16° / 37°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 43°6°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 59°15°
  Dry
3. Evening
  6 PM–midnight
  Clear, 47°8°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 35°2°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 60.
Night: Mostly clear, with a low around 35.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
57°14°–61°16°
Low, likely
35°2°–44°7°
Typical high / low
60°16° / 37°3°
Wind
10 mph16 km/h, gusts 23 mph36 km/h
UV peak
4
Wednesday, Oct 28. Partly sunny. High 60°16°, low 41°5°. Typical 59°15° / 37°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 34°1°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 58°14°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 48°9°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 44°7°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 60.
Night: Mostly cloudy, with a low around 41.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
56°13°–60°16°
Low, likely
29°−2°–41°5°
Typical high / low
59°15° / 37°3°
Wind
8 mph13 km/h, gusts 19 mph31 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 68°20°, low 44°7°. Typical 59°15° / 36°2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 43°6°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 53°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 43°6°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 68.
Night: Mostly clear, with a low around 44.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
61°16°–68°20°
Low, likely
39°4°–46°8°
Typical high / low
59°15° / 36°2°
Wind
9 mph15 km/h, gusts 24 mph38 km/h
UV peak
4
Friday, Oct 30. Partly sunny. High 68°20°, low 43°6°. Typical 59°15° / 36°2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 43°6°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 42°5°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 68.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
63°17°–70°21°
Low, likely
40°4°–46°8°
Typical high / low
59°15° / 36°2°
Wind
9 mph14 km/h, gusts 21 mph33 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 65°18°, low 44°7°. Typical 58°14° / 36°2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 41°5°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 53°12°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 47°8°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
59°15°–71°22°
Low, likely
41°5°–48°9°
Typical high / low
58°14° / 36°2°
Wind
7 mph11 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 63°17°, low 48°9°. Typical 58°14° / 36°2°. Rain 0.03 in0.8 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Drizzle, 61°16°
  30% chance · 0.01 in0.3 mm
3. Evening
  6 PM–midnight
  Drizzle, 56°13°
  30% chance · 0.01 in0.3 mm
4. Overnight
  midnight–6 AM
  Partly cloudy, 55°13°
  30% chance
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
52°11°–68°20°
Low, likely
44°7°–54°12°
Typical high / low
58°14° / 36°2°
Wind
11 mph18 km/h, gusts 26 mph41 km/h
Monday, Nov 2. Drizzle. High 63°17°, low 54°12°. Typical 57°14° / 35°2°. Rain 0.24 in6.1 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 58°14°
  30% chance · 0.04 in1 mm
2. Afternoon
  noon–6 PM
  Drizzle, 63°17°
  30% chance · 0.08 in2.1 mm
3. Evening
  6 PM–midnight
  Drizzle, 57°14°
  30% chance · 0.04 in1.1 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–67°19°
Low, likely
51°11°–56°13°
Typical high / low
57°14° / 35°2°
Wind
19 mph30 km/h, gusts 38 mph61 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 61°, low 33°.
Tomorrow
Dry, high 63°, low 34°.
Monday
Dry, high 68°, low 41°, warming up.
Rest of week
Mostly dry, highs 60–68°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (CTP) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Susquehanna River at Sunbury

1.6 mi

Below flood stage

Level: 7.2 ft
Flow: 8,430 cfs

Forecast peak 7.2 ft Sat 8 AM

Reading from Sat 2:45 AM · NWS gauge page

West Branch Susquehanna River at Lewisburg

8.0 mi

Below flood stage

Level: 2.4 ft
Flow: 3,480 cfs

Forecast peak 2.3 ft Sat 8 AM

Reading from Sat 2:45 AM · NWS gauge page

West Branch Susquehanna River at West Milton

11 mi

Below flood stage

Level: 1.7 ft
Flow: 2,030 cfs

Forecast peak 1.6 ft Sat 8 AM

Reading from Sat 2:30 AM · NWS gauge page

Penns Creek at Penns Creek

12 mi

Below flood stage

Level: 2.1 ft
Flow: 241 cfs

Forecast peak 2.1 ft Sat 8 AM

Reading from Sat 3 AM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 68% less heating than a typical week.

This week 37Typical 117

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 27
h below 17°F: 0
h below 5°F: 0

47, 17 and 5°F are the test points heat pumps are rated at. About 20 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 34°F).

Open the windows?

Today, 3:00 PM–5:00 PM

Good stretch to open the windows (air quality forecast not available for part of this window).

Is this typical?

Selinsgrove Penn Valley Airport · official normals 1991–2020 · records 1947–2026

Oct 24, today vs a typical year

Today’s expected high is about typical for the date.

Last 7 days vs normal

On average 3°2° colder than normal (daily mean temperature).

−6°−4°SunOct 18
−1°MonOct 19
—TueOct 20
−1°WedOct 21
−2°−1°ThuOct 22
—FriOct 23
—SatOct 24

Shamokin Dam weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 45 min; Losing 2 min 35 s a day; shortest Dec 21, 1 h 31 min less
Golden hour: 5:35–6:30 PM; Morning 7:11–8:06 AM
Blue hour: 6:30–6:41 PM; Morning 7:00–7:11 AM; first light 7:00 AM

Stars tonight? Good

Mostly clear 3:53–7 AM; moon 96% lit, sets 5:40 AM.

Moon

Waxing gibbous

96% lit · growing

Today: sets 5:40 AM · rises 5:10 PM
Full moon: Oct 26
New moon: Nov 9

Looking northwest from Shamokin Dam. The highest point on the skyline is about 2,200 ft, 24 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

Shamokin Dam, PA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Susquehanna River at Sunbury

West Branch Susquehanna River at Lewisburg

West Branch Susquehanna River at West Milton

Penns Creek at Penns Creek

For your home

Heating this week

Heat-pump hours, next 7 days

Comfort

Open the windows?

Is this typical?

Oct 24, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Good

Moon