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

Risks of Severe Thunderstorms and Excessive Rainfall; Fire Weather Concerns and Record Warmth

Severe thunderstorms and flash flooding risks increase across the center of the nation today. Meanwhile, ongoing thunderstorms and flash flooding will linger along the Gulf Coast states through the evening. The Great Basin and Intermountain West, warm temperatures and dry fuels with dry lightning may enhance fire weather potential. In addition, across interior Alaska, Red Flag Warning are posted. Read More >

Current conditions at

Cattaraugus County-Olean Airport (KOLE)

Lat: 42.24°NLon: 78.37°WElev: 2135ft.

Fair

52°F

11°C

Humidity 77%
Wind Speed Calm
Barometer 29.91 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 20 Jun 6:35 am EDT
Extended Forecast for

Portville NY

  • Today

    Today: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 71. Light west wind increasing to 8 to 13 mph in the morning. Chance of precipitation is 20%.

    High: 71 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 49. Light and variable wind.

    Low: 49 °F

    Partly Cloudy

  • Sunday

    Sunday: A slight chance of showers. Partly sunny, with a high near 75. Calm wind becoming northwest around 6 mph in the afternoon. Chance of precipitation is 20%.

    High: 75 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Showers likely, mainly after 2am. Mostly cloudy, with a low around 52. Calm wind. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 52 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Monday

    Monday: Showers, mainly before 2pm. High near 69. East wind around 6 mph. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.

    High: 69 °F

    Showers

  • Monday Night

    Monday Night: A chance of showers, mainly before 8pm. Mostly cloudy, with a low around 51. North wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 51 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 74. Calm wind becoming northwest 5 to 7 mph in the morning.

    High: 74 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 49. Northwest wind around 5 mph becoming calm in the evening.

    Low: 49 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

Detailed Forecast

Today
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 71. Light west wind increasing to 8 to 13 mph in the morning. Chance of precipitation is 20%.
Tonight
Partly cloudy, with a low around 49. Light and variable wind.
Sunday
A slight chance of showers. Partly sunny, with a high near 75. Calm wind becoming northwest around 6 mph in the afternoon. Chance of precipitation is 20%.
Sunday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 52. Calm wind. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Showers, mainly before 2pm. High near 69. East wind around 6 mph. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.
Monday Night
A chance of showers, mainly before 8pm. Mostly cloudy, with a low around 51. North wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Mostly sunny, with a high near 74. Calm wind becoming northwest 5 to 7 mph in the morning.
Tuesday Night
Mostly clear, with a low around 49. Northwest wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 76.
Wednesday Night
A chance of showers after 2am. Partly cloudy, with a low around 53. Chance of precipitation is 30%.
Thursday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 77. Chance of precipitation is 60%.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 54. Chance of precipitation is 60%.
Friday
Showers likely. Partly sunny, with a high near 75. Chance of precipitation is 60%.
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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:
3:57 am EDT Jun 20, 2026
Forecast Valid:
6am EDT Jun 20, 2026-6pm EDT Jun 26, 2026
 
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