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Big Mountain, Pennsylvania Weather Forecast
Big Mountain, Pennsylvania Weather
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Weather Forecast for Big Mountain, Pennsylvania : Northumberland County
Issued: 7:39 am EST Nov 4, 2025 Latitude: 40.7706413 Longitude: -76.5335692 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Wednesday Thursday Friday Saturday Sunday Monday
Sunny on Today Mostly Clear on Tonight Partly Sunny on Wednesday Mostly Sunny on Thursday Mostly Cloudy on Friday Partly Sunny on Saturday 50% chance of rain on Sunday Partly Sunny on Monday
High: 56°F Low: 37°F High: 62°F High: 50°F High: 56°F High: 57°F High: 54°F High: 42°F
Low: 40°F Low: 32°F Low: 48°F Low: 40°F Low: 33°F  
Sunny Mostly Clear Partly Sunny Mostly Sunny Mostly Cloudy Partly Sunny Rain Partly Sunny
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Current Conditions at
SELINSGROVE - (KSEG)
45°
Clear
as of 6:53 AM EST
Rel. Humidity: 56%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 30.16 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
MUIR AAF - (KMUI)
52°
Mostly Clear
as of 6:55 AM EST
Rel. Humidity: 43%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 30.12 in.
Flight Rule: VFR
Wind Data
8 MPH
280° West
Cloud Level(s): Few at 25000ft
Current Conditions at
WILLIAMSPORT - (KIPT)
43°
Feels like 36°F
Clear
as of 6:54 AM EST
Rel. Humidity: 70%
Dew Point: 34°F
Visibility: 10 Miles
Pressure: 30.13 in.
Flight Rule: VFR
Wind Data
13 MPH
270° West
Cloud Level(s): Clear
Current Conditions at
READING - (KRDG)
50°
Feels like 46°F
Clear
as of 6:54 AM EST
Rel. Humidity: 46%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 30.12 in.
Flight Rule: VFR
Wind Data
9 MPH
290° West
Cloud Level(s): Clear
Sunny on Today Today... Sunny, with a high near 56. Northwest wind 7 to 10 mph, with gusts as high as 25 mph.

Mostly Clear on Tonight Tonight... Mostly clear, with a low around 37. West wind around 5 mph becoming calm in the evening.

Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 62. Calm wind becoming southwest 5 to 9 mph in the morning. Winds could gust as high as 28 mph.

20% chance of rain Wednesday Night Wednesday Night... A slight chance of showers before 1am. Partly cloudy, with a low around 40. Northwest wind 10 to 15 mph, with gusts as high as 37 mph. Chance of precipitation is 20%.

Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 50. Northwest wind 6 to 10 mph, with gusts as high as 24 mph.

Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 32.

Mostly Cloudy on Friday Friday... Mostly cloudy, with a high near 56.

80% chance of rain Friday Night Friday Night... Showers. Low around 48. Chance of precipitation is 80%.

Partly Sunny on Saturday Saturday... Partly sunny, with a high near 57.

Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 40.

50% chance of rain Sunday Sunday... A chance of showers. Mostly cloudy, with a high near 54. Chance of precipitation is 50%.

30% chance of rain Sunday Night Sunday Night... A chance of showers. Mostly cloudy, with a low around 33. Chance of precipitation is 30%.

Partly Sunny on Monday Monday... Partly sunny, with a high near 42.

Current Radar Image


Sun Almanac for Big Mountain, Pennsylvania
Sunrise: 06:41 AM
Sunset: 4:59 PM
Civil Sunrise:06:12 AM
Civil Sunset: 5:27 PM
Nautical Sunrise: 05:40 AM
Nautical Sunset: 6:00 PM
Astro Sunrise: 05:08 AM
Astro Sunset: 6:32 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.