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Northumberland, PA 17857 Weather
Current conditions
Forecast for this hour (no station report in the last two hours)
Forecast
10-day-
Tonight
Areas of frost after 3am. Mostly clear, with a low around 34. North wind around 3 mph.
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Thursday
Widespread frost before 9am. Sunny, with a high near 64. North wind 3 to 8 mph.
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Thursday Night
Partly cloudy, with a low around 37. North wind around 6 mph.
National Weather Service forecast updated 6 hrs ago.
Hourly
Hourly forecast- Now37°
- 4 AM36°
- 5 AM36°
- 6 AM35°
- 7 AM34°
- 8 AM36°
- 9 AM41°
- 10 AM47°
- 11 AM51°
- 12 PM56°
- 1 PM58°
- 2 PM60°
- 3 PM62°
- 4 PM64°
- 5 PM63°
- 6 PM59°
- 7 PM55°
- 8 PM51°
- 9 PM50°
- 10 PM48°
- 11 PM47°
- Fri12 AM46°
- 1 AM45°
- 2 AM44°
10-day forecast
Details- TonightOct 21Mostly Clear then Areas Of Frost34°
- TodayOct 22Widespread Frost then Sunny37°64°
- FriOct 23Areas Of Frost then Sunny31°59°
- SatOct 24Widespread Frost then Sunny34°60°
- SunOct 25Patchy Frost then Sunny37°62°
- MonOct 26Sunny42°66°
- TueOct 27Mostly Sunny40°63°
- WedOct 28Partly Sunny59°
- ThuOct 29Mostly sunny39°59°
- FriOct 30Partly cloudy39°59°
Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.
Radar
Full mapWeather news near Northumberland
More weather news-
UPDATE Thunderstorm warning in place until 3:15 p.m.; Watch in effect until 8 p.m.The Daily Item Freeze Watch from SUN 1:00 AM EDT until SUN 9:00 AM EDT A severe thunderstorm warning is in effect for parts of Union, Montour and Northumberland counties until 3:15 p.m., according to the National…
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Horndean - Weather warnings issuedTonight will become mostly dry with plenty of clear spells once any daytime showers die out. A chilly night under light winds. Tomorrow is expected to be a dry and fine day with extensively sunny skies and little to no…
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Ferry crossings cancelled in the Maritimes due to high windsSeveral ferry crossings in the Maritimes are cancelled Thursday due to high winds in the region. Several ferry crossings in the Maritimes are cancelled Thursday due to high winds in the region The following departures…
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Special weather statement in effect for rain and thunderstorms in Kawarthas region overnight Monday and into TuesdayEnvironment Canada has issued a special weather statement for the entire Kawarthas region for rain and thunderstorms starting Monday night (October 12) and continuing into Tuesday afternoon or evening. The special…
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Seasonable sunshine and temperatures continue throughout the week in south central PennsylvaniaAt or above average temperatures and 10 days of dry weather ahead. Tuesday looks to be the warmest day of the workweek. Expect bright blue skies and highs climbing to around 70 degrees. From Wednesday through Friday…
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Impact: Frost & freeze alerts issued for some on Sunday night; sunny stretch next week in south central PennsylvaniaAnother chilly and frosty night across south central Pennsylvania with lows dropping into the 30s. The National Weather Service has issued freeze warnings and frost advisories for parts of the Susquehanna Valley where…
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Freeze Watch Upgraded to Warning for Almost All of Pennsylvania as Conditions WorsenFreeze Warnings are now in effect for most of Pennsylvania from 1 a.m. to 9 a.m. EDT Sunday, with lows between 25 and 30 degrees expected in central Pennsylvania. The earlier Freeze Watches have been upgraded to…
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Freeze warning in Pennsylvania after wet Saturday | NEXT WeatherCBS News Freeze warning in Pennsylvania after wet Saturday | NEXT Weather Philadelphia region sees more than 20-degree drop in temperatures Saturday Camden Catholic beats Kipp Cooper Norcross and more in Week 6 of…
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Pennsylvania weather: Cold, cloudy, breezy in upper 40sAlert!: Freeze watch Saturday night through Sunday morning (WBRE/WYOU) — Skies will clear and winds will diminish Saturday night with high pressure moving overhead. The clear sky and light winds will allow for cooling…
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Freeze Warning issued for all of western Pennsylvania as overnight temperatures will dropOctober 17, 2026 / 6:59 AM EDT / CBS Pittsburgh There are a few showers this morning, but clouds will quickly clear out this afternoon with sunshine and highs well below normal at 50 degrees. Overnight, we are going…
Air quality
Air quality is satisfactory, and air pollution poses little or no risk.
Forecast
- ThuGood (35)
- FriGood (30)
- SatGood
Williamsport, PA reporting area · 2 hrs ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Almanac
MonthlySelinsgrove 2 S, records since 1894. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
- Williamsport 41 km
- Bloomsburg 30 km
- Pottsville 56 km
- Berwick 50 km
- Sunbury 5 km
- Shamokin 23 km
- Milton 13 km
- South Williamsport 40 km
- Selinsgrove 13 km
- Lewisburg 10 km
- Mount Carmel 34 km
- Shenandoah 50 km
Forecasters' discussion
From the National Weather Service office in CTP, issued 21 hrs ago
What Has Changed
* Trimmed dewpoints this afternoon and again Sunday.
Key Messages
1) Dry and seasonably mild early Autumn weather continue through this weekend and into the last week of October.
Discussion
KEY MESSAGE 1: Dry and seasonably mild early Autumn weather continue through this weekend and into the last week of October.
Persistent, incredibly low precipitable water values (under 0.4 of an inch) will continue to reside over all of Central PA today and tonight under a ridge of high pressure.
A band of slightly higher PWAT (0.5-0.7 of an inch) and some sct-bkn, shallow stratocu (mainly across the Northern Mtns) will advect south through the CWA in the wake of a weak/dry cold front later Thursday morning and Thu afternoon as some limited moisture is picked up off the Lower Glakes.
The stretch of sensational weather continues into the last week of October. This rain-free pattern (Zero POPs areawide through Monday) is highlighted by generally sunny and warm afternoons with low humidity followed by clear and chilly moonlit nights with areas of frost and river valley fog.
High temps will average anywhere from normal (Susq Valley and Southern PA Valleys to 7 or 8 deg F above normal (Central and NW Mtns) today and Thursday before taking a brief dip to near or slightly below normal in most places on friday. A gradual rebound in temps will occur for Sat through Monday, with Monday's maxes averaging 8-11 deg f above normal (which equates to low-mid 60s across the Northern and Western Mtns and near 70 in the Southern Valleys).
Aviation
VFR conditions are virtually certain (> 90% probabilities) through 12Z Thursday under the influence of high pressure. Low pressure off the Atlantic will supply some high-level clouds mainly to MDT/LNS this afternoon and throughout the rest of the TAF package, but no large-scale aviation concerns at this time with respect to that. Valley fog will be possible across NW PA in the 06Z-12Z Thursday timeframe; however, based on the previous two nights, restrictions at BFD appear unlikely (less than 20% chance) so have left all mentions out of the 12Z TAFs.
Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Search index and reflects what the press published. Terms of use.