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Heavy Rain in the Southern Appalachians; Fire Weather and Heat in the West; Monitoring Tropical Storm Erin

Heavy to excessive rainfall over the southern Appalachians may bring areas of flooding today. Gusty winds and low relative humidity will bring critical fire weather conditions to parts of the Great Basin and northern Rockies today and Thursday. Hot to extremely hot temperatures are in place through today across parts of the western U.S. Read More >

Current conditions at

Cattaraugus County-Olean Airport (KOLE)

Lat: 42.24°NLon: 78.37°WElev: 2135ft.

Fair

73°F

23°C

Humidity 69%
Wind Speed Calm
Barometer 29.94 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 13 Aug 7:15 pm EDT
Extended Forecast for

Portville NY

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly before 9pm. Areas of fog after 1am. Otherwise, mostly cloudy, with a low around 59. Light north wind. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 59 °F

    Chance
    T-storms then
    Areas Fog

  • Thursday

    Thursday: Areas of fog before 10am. Otherwise, mostly sunny, with a high near 82. Calm wind becoming north 5 to 7 mph in the afternoon.

    High: 82 °F

    Areas Fog
    then Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 53. Light northeast wind.

    Low: 53 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 85. Calm wind.

    High: 85 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 56. Calm wind.

    Low: 56 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 87. Light and variable wind.

    High: 87 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 60. Calm wind.

    Low: 60 °F

    Mostly Clear

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 84. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 50%.

    High: 84 °F

    Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of thunderstorms before 8pm. Partly cloudy, with a low around 57. Chance of precipitation is 30%.

    Low: 57 °F

    Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Tonight
A chance of showers and thunderstorms, mainly before 9pm. Areas of fog after 1am. Otherwise, mostly cloudy, with a low around 59. Light north wind. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Areas of fog before 10am. Otherwise, mostly sunny, with a high near 82. Calm wind becoming north 5 to 7 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 53. Light northeast wind.
Friday
Sunny, with a high near 85. Calm wind.
Friday Night
Mostly clear, with a low around 56. Calm wind.
Saturday
Sunny, with a high near 87. Light and variable wind.
Saturday Night
Mostly clear, with a low around 60. Calm wind.
Sunday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 84. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 50%.
Sunday Night
A chance of thunderstorms before 8pm. Partly cloudy, with a low around 57. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 81.
Monday Night
Partly cloudy, with a low around 54.
Tuesday
A chance of showers. Mostly sunny, with a high near 79. Chance of precipitation is 30%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 53. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 74.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Portville NY
 42.03°N 78.33°W (Elev. 1601 ft)
Last Update:
4:36 pm EDT Aug 13, 2025
Forecast Valid:
7pm EDT Aug 13, 2025-6pm EDT Aug 20, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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