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

Air Quality Concerns; Fire Weather; Extreme Heat; Flash Flooding

Wildfire smoke continues to result in poor air quality from the Upper Midwest into the Northeast. Dangerous heat and fire weather concerns for portions of the Four Corners region into the central Great Basin. Heavy rainfall and flash flooding possible for the Southeast through Monday. For Hawaii, gusty trade winds a drier weather could result in any fires that start to spread rapidly. Read More >

Hazardous Weather Conditions

Current conditions at

Cattaraugus County-Olean Airport (KOLE)

Lat: 42.24°NLon: 78.37°WElev: 2135ft.

Fair

57°F

14°C

Humidity 82%
Wind Speed Calm
Barometer 30.21 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 4 Aug 3:55 am EDT
Extended Forecast for

Portville NY

  • Today

    Today: Widespread haze. Areas of fog before 9am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 83. Light and variable wind.

    High: 83 °F

    Areas Fog
    then Haze

  • Tonight

    Tonight: Widespread haze before midnight. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 54. Light east wind.

    Low: 54 °F

    Haze then
    Patchy Fog

  • Tuesday

    Tuesday: Areas of fog before 8am. Otherwise, partly sunny, with a high near 84. Light southeast wind.

    High: 84 °F

    Areas Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 58. Calm wind.

    Low: 58 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 82. Calm wind becoming southeast around 6 mph in the afternoon.

    High: 82 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 57. Calm wind.

    Low: 57 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 81. Calm wind becoming south around 6 mph in the afternoon.

    High: 81 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 58. Light south wind.

    Low: 58 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

Detailed Forecast

Today
Widespread haze. Areas of fog before 9am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 83. Light and variable wind.
Tonight
Widespread haze before midnight. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 54. Light east wind.
Tuesday
Areas of fog before 8am. Otherwise, partly sunny, with a high near 84. Light southeast wind.
Tuesday Night
Mostly cloudy, with a low around 58. Calm wind.
Wednesday
Partly sunny, with a high near 82. Calm wind becoming southeast around 6 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 57. Calm wind.
Thursday
Mostly sunny, with a high near 81. Calm wind becoming south around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 58. Light south wind.
Friday
Sunny, with a high near 82.
Friday Night
Mostly clear, with a low around 57.
Saturday
Sunny, with a high near 85.
Saturday Night
Partly cloudy, with a low around 59.
Sunday
Mostly sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Portville NY
 42.03°N 78.33°W (Elev. 1601 ft)
Last Update:
1:36 am EDT Aug 4, 2025
Forecast Valid:
4am EDT Aug 4, 2025-6pm EDT Aug 10, 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