Williamsport, PA 17701 Weather

Lycoming County6:57 PM EDT41.24°N, 77.00°W

Current conditions

Clear
55°
Clear
Feels like 55°
High 65° Thursday·Low 34° tonight
WindCalm
Humidity62%
Dew point43°
Pressure30.15 inHg
Visibility10 mi
Cloud cover3%
UV index0 Low
Sunrise7:27 AM
Sunset6:20 PM

Observed at Williamsport - Lycoming County Airport · 52 min ago

Forecast

10-day

  • Tonight

    Patchy fog between 2am and 3am, then areas of frost and patchy fog. Mostly clear, with a low around 34. Northwest wind 2 to 6 mph.

  • Thursday

    Widespread frost and patchy fog before 10am. Sunny, with a high near 65. Northwest wind 6 to 10 mph.

  • Thursday Night

    Patchy fog after 2am. Partly cloudy, with a low around 36. North wind around 7 mph.

National Weather Service forecast updated 4 hrs ago.

Hourly

Hourly forecast
  1. Now Clear 58°
  2. 7 PM Clear 53°
  3. 8 PM Clear 49°
  4. 9 PM Clear 47°
  5. 10 PM Clear 46°
  6. 11 PM Mostly Clear 44°
  7. Thu12 AM Mostly Clear 42°
  8. 1 AM Mostly Clear 40°
  9. 2 AM Patchy Fog 38°
  10. 3 AM Patchy Frost 37°
  11. 4 AM Areas Of Frost 36°
  12. 5 AM Areas Of Frost 36°
  13. 6 AM Areas Of Frost 35°
  14. 7 AM Widespread Frost 34°
  15. 8 AM Widespread Frost 34°
  16. 9 AM Patchy Fog 40°
  17. 10 AM Sunny 47°
  18. 11 AM Sunny 51°
  19. 12 PM Sunny 56°
  20. 1 PM Sunny 59°
  21. 2 PM Sunny 61°
  22. 3 PM Sunny 63°
  23. 4 PM Sunny 65°
  24. 5 PM Mostly Sunny 64°

10-day forecast

Details
  1. TonightOct 21 Mostly Clear then Patchy Fog Mostly Clear then Patchy Fog34°
  2. ThuOct 22 Widespread Frost then Sunny Widespread Frost then Sunny36°65°
  3. FriOct 23 Patchy Fog then Sunny Patchy Fog then Sunny31°59°
  4. SatOct 24 Widespread Frost then Sunny Widespread Frost then Sunny34°60°
  5. SunOct 25 Patchy Frost then Sunny Patchy Frost then Sunny38°63°
  6. MonOct 26 Sunny Sunny44°69°
  7. TueOct 27 Mostly Sunny Mostly Sunny40°64°
  8. WedOct 28 Partly Sunny Partly Sunny59°
  9. ThuOct 29 Cloudy Cloudy50°62°
  10. FriOct 30 Rain Rain0.17 in50°60°

Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.

Radar

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Air quality

30
Good
Ozone

Air quality is satisfactory, and air pollution poses little or no risk.

Forecast

  • WedGood (25)
  • ThuGood (35)
  • FriGood (30)

Williamsport, PA reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.

Sun & moon

Sunrise 7:27 AM
Sunset 6:20 PM
Daylight 10 h 52 min (−2 min 36 s tomorrow)
Waxing Gibbous · 80% lit
Moonrise 4:00 PM Moonset 2:24 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low61° / 41°
Record high86° (1947)
Record low24° (1972)
Wettest2.89 in (1995)
Yesterday72° / 37°
Month to date1.71 in (normal 2.50 in)

Williamsport Area, records since 1895. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in CTP, issued 12 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 4Conservative index and reflects what the press published. Terms of use.