Selinsgrove, PA 17870 Weather

Snyder County4:37 AM EDT40.82°N, 76.87°W

Current conditions

Mostly Clear
54°
Mostly Clear
Feels like 54°
High 62°·Low 39° tonight
WindNNE 9 mph
Humidity71%
Dew point45°
Pressure30.24 inHg
Visibility10 mi
Cloud cover7%
UV index0 Low
Sunrise7:28 AM
Sunset6:17 PM

Observed at Selinsgrove Penn Valley Airport · 1 hr ago

Forecast

10-day

  • Overnight

    Patchy fog after 4am. Mostly clear, with a low around 39. North wind around 3 mph.

  • Friday

    Patchy fog before 7am. Sunny, with a high near 62. Northeast wind 1 to 5 mph.

  • Friday Night

    Areas of frost between 1am and 3am, then widespread frost and patchy fog. Mostly clear, with a low around 30. Northeast wind around 2 mph.

National Weather Service forecast updated 5 hrs ago.

Hourly

Hourly forecast
  1. Now Patchy Fog 42°
  2. 5 AM Patchy Fog 41°
  3. 6 AM Patchy Fog 40°
  4. 7 AM Mostly Sunny 40°
  5. 8 AM Mostly Sunny 40°
  6. 9 AM Sunny 42°
  7. 10 AM Sunny 49°
  8. 11 AM Sunny 52°
  9. 12 PM Sunny 55°
  10. 1 PM Sunny 58°
  11. 2 PM Sunny 60°
  12. 3 PM Sunny 61°
  13. 4 PM Sunny 60°
  14. 5 PM Sunny 60°
  15. 6 PM Mostly Clear 55°
  16. 7 PM Mostly Clear 51°
  17. 8 PM Mostly Clear 46°
  18. 9 PM Partly Cloudy 46°
  19. 10 PM Mostly Clear 43°
  20. 11 PM Mostly Clear 41°
  21. Sat12 AM Mostly Clear 38°
  22. 1 AM Patchy Frost 36°
  23. 2 AM Areas Of Frost 35°
  24. 3 AM Areas Of Frost 33°

10-day forecast

Details
  1. TonightOct 22 Patchy Fog Patchy Fog39°
  2. TodayOct 23 Patchy Fog then Sunny Patchy Fog then Sunny30°62°
  3. SatOct 24 Widespread Frost then Sunny Widespread Frost then Sunny32°62°
  4. SunOct 25 Widespread Frost then Sunny Widespread Frost then Sunny34°64°
  5. MonOct 26 Sunny Sunny42°68°
  6. TueOct 27 Mostly Sunny Mostly Sunny38°63°
  7. WedOct 28 Partly Sunny Partly Sunny41°62°
  8. ThuOct 29 Mostly Cloudy Mostly Cloudy64°
  9. FriOct 30 Light rain Light rain0.03 in46°69°
  10. SatOct 31 Sunny Sunny40°58°

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

Radar

Full map
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Air quality

43
Good
Fine particles (PM2.5)

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

Forecast

  • FriGood (30)
  • SatGood (30)
  • SunGood

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 7:28 AM
Sunset 6:17 PM
Daylight 10 h 48 min (−2 min 32 s tomorrow)
Waxing Gibbous · 90% lit
Moonrise 4:44 PM Moonset 4:35 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low61° / 39°
Record high85° (1979)
Record low23° (1980)
Wettest1.83 in (1937)
Month to date2.61 in (normal 2.86 in)

Selinsgrove 2 S, records since 1894. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in CTP, issued 5 hrs ago

What Has Changed

* Freeze Watch continues for Friday night for Lancaster and Lebanon Counties. * Adjustments to near-term temperatures due to cloud cover across the northern tier.

Key Messages

1) Dry weather continues into the end of October.

Discussion

KEY MESSAGE 1: Dry weather continues into the end of October.

Overall, forecast remains in fairly good shape outside of the next couple of hours where cloud cover associated with the cold frontal passage has allowed for slightly higher temperatures across the northern tier. This will also lower the fog threat overnight; however, some of the more sheltered valley locations south of I-80 could get some patchy fog closer to daybreak.

Previous Discussion, Issued at 2:14 PM EDT 10/22/2026:

A dry cold frontal passage this evening into tonight will barely be noticeable other than an increase in cloud cover along and behind the front. High pressure builds into the region again behind the front for tomorrow as a pronounced ridge develops over the eastern US. This will keep dry conditions around through at least the beginning of next week with seasonably warm days and chilly nights.

HREF probs of temperatures falling below freezing Friday night are around 50 percent for Lancaster and Lebanon Counties (the only zones where the growing season remains active). This is supported by the NAM MOS guidance which shows temperatures right around 32 in both of those counties. This information, combined with the very favorable set up for efficient radiational cooling, has given us enough confidence to issue a Freeze Watch for Friday night/Saturday morning.

Aviation

Mainly VFR conditions due to high pressure and dry weather will continue for the remainder of this week and into this weekend. Outside of brief periods of valley fog and a thin low stratus deck tonight, there are very low probabilities of reductions to flight categories through Tuesday.

Through the overnight hours, a SCT-BKN thin deck of post- frontal stratus will overspread over the northern half of central Pennsylvania, with few to no clouds expected south of the central Mountains and I-80. The Northern Tier (KBFD) is moderately likely (40-50% chance) to see periods of MVFR ceilings through the night, mainly towards the early hours of Friday morning. Lower chances for MVFR are present (mainly less than 20%) across the central mountains (KUNV/KIPT). These clouds will likely scatter out quickly after sunrise, and VFR will be the dominant flight conditions for Friday.

Sat-Tue...VFR prevailing conditions.

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.