Susquehanna River at Marietta
7.3 mi- Level
- 34.5 ft
- Flow
- 13,900 cfs
Forecast peak 34.4 ft Sat 2 PM
Reading from Sat 10:30 AM · NWS gauge page
Observed 10:55 AM EDT at KTHV
Stonybrook, PA weather
Sunny and 52°11°.
Today: low 36°2° (likely 33°1° to 37°3°), high 63°17° (likely 59°15° to 63°17°).
Now 52°11°
Sunny
- Wind
- 3 mph5 km/h
- From the southeast. Light through 11 PM
- Dew point
- 43°6°
- Comfortable
- UV index
- 3Moderate
- Moderate until 4 PM · peak 4
- Air quality
- 75Moderate
- Main pollutant: PM2.5 (fine particles)
- Pressure
- 30.57 inHg1035 hPa
- Steady over the last 3 h
Next 2 hours
No precipitation expected in the next 2 hours.
From forecast models
Next 48 hours
6°3° cooler than this time yesterday (53°12° then, 47°8° now)
Good hours for
This afternoonUp to 62°17° by 4 PM · Clear
TonightDown to 38°3° by 4 AM · Clear
Tomorrow morningUp to 54°12° by 11 AM · Clear
Tomorrow afternoonUp to 65°18° by 4 PM · Clear
Tomorrow nightDown to 40°4° by 4 AM · Clear
Monday morningUp to 51°11° by 10 AM · Clear
| Hour | Conditions | Temperature | Feels like | Precipitation | Wind | Humidity | Cloud cover | UV index |
|---|---|---|---|---|---|---|---|---|
| Sat 11a | Sunny | 51°11° (likely 51°11° to 53°12°) | 51°11° | 0% | 1 mph2 km/h from NE, gusts 3 mph4 km/h | 62% | 2% | 3 |
| Sat 12p | Sunny | 55°13° (likely 54°12° to 57°14°) | 55°13° | 0% | 1 mph2 km/h from NE, gusts 4 mph6 km/h | 54% | 1% | 4 |
| Sat 1p | Sunny | 59°15° (likely 57°14° to 59°15°) | 59°15° | 0% | 1 mph2 km/h from E, gusts 5 mph7 km/h | 43% | 1% | 4 |
| Sat 2p | Sunny | 61°16° (likely 58°14° to 61°16°) | 61°16° | 0% | 1 mph2 km/h from SE, gusts 4 mph7 km/h | 38% | 2% | 4 |
| Sat 3p | Sunny | 61°16° (likely 59°15° to 61°16°) | 61°16° | 0% | 1 mph2 km/h from SE, gusts 4 mph6 km/h | 39% | 3% | 3 |
| Sat 4p | Sunny | 62°17° (likely 59°15° to 62°17°) | 62°17° | 0% | 1 mph2 km/h from SE, gusts 4 mph7 km/h | 39% | 2% | 2 |
| Sat 5p | Sunny | 61°16° (likely 58°14° to 61°16°) | 61°16° | 0% | 2 mph3 km/h from E, gusts 6 mph9 km/h | 41% | 0% | 1 |
| Sat 6p | Clear | 58°14° (likely 53°12° to 58°14°) | 58°14° | 0% | 1 mph2 km/h from SE, gusts 5 mph9 km/h | 46% | 0% | 0 |
| Sat 7p | Clear | 53°12° (likely 49°9° to 53°12°) | 53°12° | 0% | 1 mph2 km/h from SE, gusts 4 mph7 km/h | 55% | 0% | 0 |
| Sat 8p | Clear | 49°9° (likely 47°8° to 49°9°) | 49°9° | 0% | 1 mph2 km/h from SE, gusts 4 mph6 km/h | 63% | 0% | 0 |
| Sat 9p | Clear | 46°8° (likely 45°7° to 47°8°) | 46°8° | 0% | 0 mph0 km/h, gusts 4 mph7 km/h | 71% | 0% | 0 |
| Sat 10p | Clear | 45°7° (likely 44°7° to 46°8°) | 45°7° | 0% | 0 mph0 km/h, gusts 6 mph9 km/h | 73% | 0% | 0 |
| Sat 11p | Clear | 43°6° (likely 42°6° to 45°7°) | 43°6° | 0% | 0 mph0 km/h, gusts 6 mph10 km/h | 79% | 0% | 0 |
| Sun 12a | Clear | 42°6° (likely 41°5° to 44°7°) | 42°6° | 0% | 0 mph0 km/h, gusts 5 mph8 km/h | 82% | 0% | 0 |
| Sun 1a | Clear | 41°5° (likely 40°4° to 43°6°) | 41°5° | 0% | 0 mph0 km/h, gusts 5 mph8 km/h | 82% | 0% | 0 |
| Sun 2a | Clear | 40°4° (likely 39°4° to 42°6°) | 40°4° | 0% | 0 mph0 km/h, gusts 4 mph7 km/h | 85% | 0% | 0 |
| Sun 3a | Clear | 39°4° (likely 39°4° to 42°6°) | 39°4° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 89% | 0% | 0 |
| Sun 4a | Clear | 38°3° (likely 36°2° to 41°5°) | 38°3° | 0% | 0 mph0 km/h, gusts 2 mph3 km/h | 92% | 0% | 0 |
| Sun 5a | Clear | 38°3° (likely 35°2° to 41°5°) | 38°3° | 0% | 0 mph0 km/h, gusts 2 mph3 km/h | 92% | 0% | 0 |
| Sun 6a | Clear | 37°3° (likely 34°1° to 41°5°) | 37°3° | 0% | 0 mph0 km/h, gusts 2 mph3 km/h | 92% | 1% | 0 |
| Sun 7a | Sunny | 36°2° (likely 34°1° to 40°4°) | 36°2° | 0% | 0 mph0 km/h, gusts 1 mph2 km/h | 96% | 2% | 0 |
| Sun 8a | Sunny | 37°3° (likely 34°1° to 40°4°) | 37°3° | 0% | 0 mph0 km/h, gusts 2 mph3 km/h | 96% | 2% | 0 |
| Sun 9a | Sunny | 42°6° (likely 38°3° to 44°7°) | 42°6° | 0% | 0 mph0 km/h, gusts 2 mph3 km/h | 93% | 2% | 1 |
| Sun 10a | Sunny | 50°10° (likely 46°8° to 50°10°) | 50°10° | 0% | 0 mph0 km/h, gusts 2 mph4 km/h | 74% | 2% | 2 |
| Sun 11a | Sunny | 54°12° (likely 54°12° to 55°13°) | 54°12° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 69% | 2% | 3 |
| Sun 12p | Sunny | 58°14° (likely 57°14° to 58°14°) | 58°14° | 0% | 1 mph2 km/h from W, gusts 6 mph10 km/h | 59% | 3% | 4 |
| Sun 1p | Sunny | 61°16° (likely 59°15° to 61°16°) | 61°16° | 0% | 1 mph2 km/h from W, gusts 6 mph10 km/h | 53% | 7% | 4 |
| Sun 2p | Sunny | 64°18° (likely 61°16° to 64°18°) | 64°18° | 0% | 2 mph3 km/h from W, gusts 7 mph11 km/h | 48% | 6% | 4 |
| Sun 3p | Sunny | 64°18° (likely 62°17° to 64°18°) | 64°18° | 0% | 1 mph2 km/h from W, gusts 7 mph11 km/h | 50% | 5% | 3 |
| Sun 4p | Sunny | 65°18° (likely 62°17° to 65°18°) | 65°18° | 0% | 1 mph2 km/h from SW, gusts 7 mph11 km/h | 48% | 4% | 2 |
| Sun 5p | Sunny | 64°18° (likely 61°16° to 64°18°) | 64°18° | 0% | 1 mph2 km/h from SW, gusts 7 mph11 km/h | 50% | 1% | 1 |
| Sun 6p | Clear | 61°16° (likely 56°13° to 61°16°) | 61°16° | 0% | 0 mph0 km/h, gusts 5 mph9 km/h | 56% | 1% | 0 |
| Sun 7p | Clear | 56°13° (likely 53°12° to 56°13°) | 56°13° | 0% | 1 mph2 km/h from S, gusts 5 mph9 km/h | 64% | 0% | 0 |
| Sun 8p | Clear | 51°11° (likely 50°10° to 52°11°) | 51°11° | 0% | 1 mph2 km/h from S, gusts 5 mph8 km/h | 74% | 1% | 0 |
| Sun 9p | Clear | 48°9° (likely 48°9° to 50°10°) | 48°9° | 0% | 0 mph0 km/h, gusts 4 mph6 km/h | 80% | 1% | 0 |
| Sun 10p | Clear | 46°8° (likely 46°8° to 48°9°) | 46°8° | 0% | 0 mph0 km/h, gusts 5 mph8 km/h | 86% | 0% | 0 |
| Sun 11p | Clear | 45°7° (likely 44°7° to 47°8°) | 45°7° | 0% | 1 mph2 km/h from S, gusts 6 mph10 km/h | 89% | 0% | 0 |
| Mon 12a | Clear | 44°7° (likely 42°6° to 46°8°) | 44°7° | 0% | 1 mph2 km/h from SW, gusts 7 mph11 km/h | 89% | 5% | 0 |
| Mon 1a | Clear | 43°6° (likely 40°4° to 45°7°) | 43°6° | 0% | 1 mph2 km/h from SW, gusts 7 mph11 km/h | 93% | 11% | 0 |
| Mon 2a | Clear | 42°6° (likely 39°4° to 44°7°) | 42°6° | 0% | 1 mph2 km/h from SW, gusts 6 mph10 km/h | 93% | 12% | 0 |
| Mon 3a | Clear | 41°5° (likely 37°3° to 43°6°) | 41°5° | 0% | 1 mph2 km/h from W, gusts 6 mph10 km/h | 96% | 12% | 0 |
| Mon 4a | Clear | 40°4° (likely 36°2° to 43°6°) | 40°4° | 0% | 1 mph2 km/h from W, gusts 6 mph10 km/h | 96% | 12% | 0 |
| Mon 5a | Clear | 40°4° (likely 36°2° to 42°6°) | 40°4° | 0% | 1 mph2 km/h from W, gusts 7 mph10 km/h | 96% | 13% | 0 |
| Mon 6a | Clear | 39°4° (likely 35°2° to 41°5°) | 39°4° | 0% | 1 mph2 km/h from W, gusts 6 mph10 km/h | 96% | 16% | 0 |
| Mon 7a | Sunny | 38°3° (likely 35°2° to 41°5°) | 38°3° | 0% | 2 mph3 km/h from W, gusts 6 mph10 km/h | 100% | 14% | 0 |
| Mon 8a | Sunny | 39°4° (likely 36°2° to 42°6°) | 39°4° | 0% | 2 mph3 km/h from W, gusts 6 mph10 km/h | 100% | 14% | 0 |
| Mon 9a | Sunny | 44°7° (likely 39°4° to 48°9°) | 42°6° | 0% | 3 mph5 km/h from W, gusts 6 mph9 km/h | 89% | 16% | 1 |
| Mon 10a | Sunny | 51°11° (likely 46°8° to 53°12°) | 51°11° | 0% | 3 mph5 km/h from W, gusts 8 mph12 km/h | 77% | 3% | 2 |
Days ahead
Shaded: typical range for these dates (1991–2020)
Today, Oct 24. Sunny. High 63°17°, low 36°2°. Typical 62°17° / 45°7°. Dry. Forecasts agree.
Afternoon
noon–6 PM
Sunny, 62°17°Dry
Evening
6 PM–midnight
Clear, 49°9°Dry
Overnight
midnight–6 AM
Clear, 38°3°Dry
Official NWS forecast
Today: Sunny, with a high near 63. East wind around 2 mph.
Tonight: Patchy fog between 2am and 4am. Mostly clear, with a low around 36. Southeast wind around 1 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
- High, likely
- 59°15°–63°17°
- Low, likely
- 33°1°–37°3°
- Typical high / low
- 62°17° / 45°7°
- Wind
- 7 mph11 km/h
- UV peak
- 4
Tomorrow, Oct 25. Sunny. High 66°19°, low 38°3°. Typical 61°16° / 45°7°. Dry. Forecasts agree.
Morning
6 AM–noon
Sunny, 37°3°Dry
Afternoon
noon–6 PM
Sunny, 65°18°Dry
Evening
6 PM–midnight
Clear, 51°11°Dry
Overnight
midnight–6 AM
Clear, 40°4°Dry
Official NWS forecast
Day: Patchy fog between 9am and 10am. Sunny, with a high near 66. West wind around 2 mph.
Night: Patchy fog between 3am and 5am. Mostly clear, with a low around 38. Southwest wind around 1 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
- High, likely
- 62°17°–66°19°
- Low, likely
- 33°1°–40°4°
- Typical high / low
- 61°16° / 45°7°
- Wind
- 6 mph10 km/h
- UV peak
- 4
Monday, Oct 26. Fog. High 69°21°, low 46°8°. Typical 61°16° / 44°7°. Dry. Forecasts agree.
Morning
6 AM–noon
Sunny, 39°4°Dry
Afternoon
noon–6 PM
Sunny, 67°19°Dry
Evening
6 PM–midnight
Clear, 55°13°Dry
Overnight
midnight–6 AM
Clear, 49°9°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Patchy fog before 9am. Sunny, with a high near 69. West wind 1 to 7 mph.
Night: Mostly clear, with a low around 46.
Forecasts agreeIndependent forecasts are close; the range is narrow.
- High, likely
- 66°19°–69°21°
- Low, likely
- 35°2°–46°8°
- Typical high / low
- 61°16° / 44°7°
- Wind
- 9 mph14 km/h, gusts 15 mph24 km/h
- UV peak
- 4
Tuesday, Oct 27. Mostly sunny. High 64°18°, low 40°4°. Typical 60°16° / 44°7°. Dry. Mostly agree.
Morning
6 AM–noon
Sunny, 47°8°Dry
Afternoon
noon–6 PM
Sunny, 63°17°Dry
Evening
6 PM–midnight
Clear, 51°11°Dry
Overnight
midnight–6 AM
Clear, 41°5°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 64.
Night: Mostly clear, with a low around 40.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 61°16°–65°18°
- Low, likely
- 40°4°–48°9°
- Typical high / low
- 60°16° / 44°7°
- Wind
- 9 mph14 km/h, gusts 19 mph30 km/h
- UV peak
- 4
Wednesday, Oct 28. Cloudy. High 63°17°, low 45°7°. Typical 60°16° / 44°7°. Dry. Mostly agree.
Morning
6 AM–noon
Partly sunny, 40°5°Dry
Afternoon
noon–6 PM
Cloudy, 61°16°Dry
Evening
6 PM–midnight
Cloudy, 52°11°Dry
Overnight
midnight–6 AM
Clear, 46°8°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 63.
Night: Mostly cloudy, with a low around 45.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 60°16°–63°17°
- Low, likely
- 37°3°–45°7°
- Typical high / low
- 60°16° / 44°7°
- Wind
- 7 mph11 km/h, gusts 17 mph28 km/h
- UV peak
- 3
Thursday, Oct 29. Partly sunny. High 70°21°, low 49°9°. Typical 60°16° / 44°7°. Dry. Mostly agree.
Morning
6 AM–noon
Sunny, 44°7°Dry
Afternoon
noon–6 PM
Sunny, 66°19°Dry
Evening
6 PM–midnight
Clear, 55°13°Dry
Overnight
midnight–6 AM
Clear, 47°8°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 70.
Night: Mostly clear, with a low around 49.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 65°18°–70°21°
- Low, likely
- 41°5°–49°9°
- Typical high / low
- 60°16° / 44°7°
- Wind
- 8 mph12 km/h, gusts 24 mph39 km/h
- UV peak
- 4
Friday, Oct 30. Mostly sunny. High 71°22°, low 47°8°. Typical 59°15° / 43°6°. Dry. Mostly agree.
Morning
6 AM–noon
Sunny, 46°8°Dry
Afternoon
noon–6 PM
Sunny, 70°21°Dry
Evening
6 PM–midnight
Clear, 58°14°Dry
Overnight
midnight–6 AM
Clear, 47°8°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 71.
Night: Mostly clear, with a low around 47.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 69°21°–73°23°
- Low, likely
- 43°6°–49°9°
- Typical high / low
- 59°15° / 43°6°
- Wind
- 12 mph19 km/h, gusts 25 mph41 km/h
- UV peak
- 4
Saturday, Oct 31. Cloudy. High 69°21°, low 46°8°. Typical 59°15° / 43°6°. Dry. Forecasts differ.
Morning
6 AM–noon
Sunny, 45°7°Dry
Afternoon
noon–6 PM
Mostly sunny, 68°20°Dry
Evening
6 PM–midnight
Cloudy, 57°14°Dry
Overnight
midnight–6 AM
Cloudy, 49°9°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
- 60°16°–73°23°
- Low, likely
- 40°4°–50°10°
- Typical high / low
- 59°15° / 43°6°
- Wind
- 11 mph18 km/h, gusts 26 mph41 km/h
- UV peak
- 4
Sunday, Nov 1. Cloudy. High 66°19°, low 49°9°. Typical 58°14° / 42°6°. Rain 0.01 in0.3 mm, 30% chance. Forecasts differ.
Morning
6 AM–noon
Partly sunny, 48°9°Dry
Afternoon
noon–6 PM
Cloudy, 65°18°Dry
Evening
6 PM–midnight
Cloudy, 56°13°30% chance
Overnight
midnight–6 AM
Partly cloudy, 53°12°30% chance · 0.02 in0.4 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.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 54°12°–72°22°
- Low, likely
- 37°3°–55°13°
- Typical high / low
- 58°14° / 42°6°
- Wind
- 9 mph15 km/h, gusts 22 mph36 km/h
- UV peak
- 3
Monday, Nov 2. Cloudy. High 65°18°, low 53°12°. Typical 58°14° / 42°6°. Rain 0.11 in2.8 mm, 30% chance. Forecasts differ.
Morning
6 AM–noon
Cloudy, 57°14°20% chance
Afternoon
noon–6 PM
Cloudy, 66°19°20% chance
Evening
6 PM–midnight
Cloudy, 56°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
- 54°12°–73°23°
- Low, likely
- 40°4°–59°15°
- Typical high / low
- 58°14° / 42°6°
- Wind
- 11 mph17 km/h, gusts 17 mph27 km/h
- UV peak
- 2
The outlook
Today
Dry, high 63°, low 36°.
Tomorrow
Dry, high 66°, low 38°, warming up.
Monday
Dry, high 69°, low 46°, warming up.
Rest of week
Mostly dry, highs 63–71°.
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
Rivers
NOAA river gauges within 25 mi
Below flood stage
Kreutz Creek at Strickler
4.9 mi- Level
- 1.7 ft
- Flow
- 21 cfs
Reading from Sat 10:15 AM · NWS gauge page
Codorus Creek near Saginaw
5.1 mi- Level
- 1.9 ft
- Flow
- 130 cfs
Reading from Sat 9:45 AM · NWS gauge page
Codorus Creek near York
7.0 mi- Level
- 2.1 ft
- Flow
- 74 cfs
Reading from Sat 10 AM · NWS gauge page
For your home
What this week’s weather means for heating, cooling, pipes and fresh air.
Heating this week
About 64% less heating than a typical week.
This week 32Typical 89
Heating degree days, base 65°F
Heat-pump hours, next 7 days
- h below 47°F
- 25
- 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 17 hours are near freezing and damp, when outdoor units defrost more often.
Comfort
Dry air outside (dew point 43°F).
Open the windows?
Today, 2:00 PM–5:00 PM
Good stretch to open the windows.
Is this typical?
Safe Harbor Dam · official normals 1991–2020 · records 1995–2026
Oct 24, today vs a typical year
Today’s expected high is about typical for the date.
- Normal high / low
- 62°17° / 45°7°
- Forecast high / low
- 63°17° / 36°2°
- Record high
- 78°26° in 2007
- Record low
- 37°3° in 2008
Last 7 days vs normal
On average 2°1° colder than normal (daily mean temperature).
- −8°−5°SunOct 18
- −5°−3°MonOct 19
- −1°TueOct 20
- +3°+2°WedOct 21
- +1°±0°ThuOct 22
- +2°+1°FriOct 23
- —SatOct 24
Stonybrook weather by month: normals, records, snow and freeze dates
Sun & moon
Sun
Sunrise 7:26 AM, sunset 6:14 PM.
- Daylight
- 10 h 47 min
- Losing 2 min 25 s a day; shortest Dec 21, 1 h 28 min less
- Golden hour
- 5:36–6:31 PM
- Morning 7:09–8:04 AM
- Blue hour
- 6:31–6:41 PM
- Morning 6:59–7:09 AM; first light 6:59 AM
Stars tonight? Fair
Clear 6:41 PM–7 AM, but the moon is 99% lit and up.
Moon
Waxing gibbous
97% lit · growing
- Today
- sets 5:38 AM · rises 5:10 PM
- Full moon
- Oct 26
- New moon
- Nov 9
