National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Summer Heat In Multiple Spots

A large dome of high pressure is expected to deliver summer heat with humidity in multiple sections of the country to start off the week. Excessive heat warnings and heat advisories are in effect across the south-central Plains, Mid to Lower Mississippi Valley and from the Mid-Atlantic into the Northeast. This includes the cities of New York, Philadelphia, Dallas, Oklahoma City and Kansas City. Read More >

Current conditions at

Selinsgrove Penn Valley Airport (KSEG)

Lat: 40.82°NLon: 76.87°WElev: 443ft.

Fair

65°F

18°C

Humidity 97%
Wind Speed Calm
Barometer 29.99 in (1015.4 mb)
Dewpoint 64°F (18°C)
Visibility 8.00 mi
Last update 19 Aug 5:53 am EDT
Extended Forecast for

Northumberland PA

  • Today

    Today: Scattered showers and thunderstorms, mainly after 2pm. Patchy fog before 9am. Otherwise, partly sunny and hot, with a high near 92. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Slight Chance
    T-storms and
    Patchy Fog
    then
    Scattered
    Showers

    High: 92 °F

  • Tonight

    Tonight: Scattered showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 70. Light northwest wind. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Scattered
    Showers then
    Slight Chance
    T-storms

    Low: 70 °F

  • Tuesday

    Tuesday: A chance of showers and thunderstorms. Partly sunny, with a high near 90. Calm wind. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Chance
    Showers then
    Chance
    T-storms

    High: 90 °F

  • Tuesday
    Night

    Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Calm wind. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Chance
    T-storms then
    Chance
    Showers

    Low: 68 °F

  • Wednesday

    Wednesday: Showers and thunderstorms likely, mainly after 2pm. Partly sunny, with a high near 90. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Chance
    Showers then
    T-storms
    Likely

    High: 90 °F

  • Wednesday
    Night

    Wednesday Night: Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 69. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    T-storms
    Likely

    Low: 69 °F

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 8am. Partly sunny, with a high near 84. Chance of precipitation is 40%.

    Chance
    T-storms

    High: 84 °F

  • Thursday
    Night

    Thursday Night: Partly cloudy, with a low around 59.

    Partly Cloudy

    Low: 59 °F

  • Friday

    Friday: Mostly sunny, with a high near 79.

    Mostly Sunny

    High: 79 °F

Detailed Forecast

Today
Scattered showers and thunderstorms, mainly after 2pm. Patchy fog before 9am. Otherwise, partly sunny and hot, with a high near 92. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Scattered showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 70. Light northwest wind. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 90. Calm wind. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Calm wind. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers and thunderstorms likely, mainly after 2pm. Partly sunny, with a high near 90. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 69. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
A chance of showers, with thunderstorms also possible after 8am. Partly sunny, with a high near 84. Chance of precipitation is 40%.
Thursday Night
Partly cloudy, with a low around 59.
Friday
Mostly sunny, with a high near 79.
Friday Night
Partly cloudy, with a low around 56.
Saturday
Mostly sunny, with a high near 80.
Saturday Night
Partly cloudy, with a low around 57.
Sunday
Mostly sunny, with a high near 81.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Northumberland PA
 40.89°N 76.79°W (Elev. 482 ft)
Last Update:
5:47 am EDT Aug 19, 2019
Forecast Valid:
6am EDT Aug 19, 2019-6pm EDT Aug 25, 2019
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation