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

Heavy to Excessive Rainfall in the Southeast; Critical Fire Weather in the Northern Plains/Upper Midwest and Southwest

A slow-moving storm system will continue to bring thunderstorms, heavy rain and flooding potential from Southeast Florida, into the Southern to Central Appalachians and the Mid-Atlantic regions today into Wednesday. Gusty winds and dry fuels will support widespread critical fire weather in the northern Plains into the Upper Midwest and the Southwest. Read More >

Current conditions at

Cattaraugus County-Olean Airport (KOLE)

Lat: 42.24°NLon: 78.37°WElev: 2135ft.

Fair

61°F

16°C

Humidity 59%
Wind Speed S 5 mph
Barometer 30.12 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 13 May 2:35 am EDT
Extended Forecast for

Portville NY

  • Overnight

    Overnight: A chance of showers, mainly after 5am. Cloudy, with a low around 57. Light southeast wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 57 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Showers, mainly before 1pm. High near 69. Southeast wind 6 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 69 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers likely, mainly before 2am. Cloudy, with a low around 57. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 57 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers. Mostly cloudy, with a high near 70. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    High: 70 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A slight chance of showers before 2am. Mostly cloudy, with a low around 58. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 58 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 76. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 76 °F

    Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely before 8pm, then a chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 59. Calm wind. Chance of precipitation is 60%.

    Low: 59 °F

    Showers
    Likely then
    Chance
    T-storms

  • Friday

    Friday: A chance of showers and thunderstorms, then showers likely after 8am. Partly sunny, with a high near 80. West wind 5 to 9 mph. Chance of precipitation is 60%.

    High: 80 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A chance of showers. Partly cloudy, with a low around 56. Chance of precipitation is 30%.

    Low: 56 °F

    Chance
    Showers

Detailed Forecast

Overnight
A chance of showers, mainly after 5am. Cloudy, with a low around 57. Light southeast wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Showers, mainly before 1pm. High near 69. Southeast wind 6 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
Showers likely, mainly before 2am. Cloudy, with a low around 57. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A chance of showers. Mostly cloudy, with a high near 70. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A slight chance of showers before 2am. Mostly cloudy, with a low around 58. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Thursday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 76. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Showers likely before 8pm, then a chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 59. Calm wind. Chance of precipitation is 60%.
Friday
A chance of showers and thunderstorms, then showers likely after 8am. Partly sunny, with a high near 80. West wind 5 to 9 mph. Chance of precipitation is 60%.
Friday Night
A chance of showers. Partly cloudy, with a low around 56. Chance of precipitation is 30%.
Saturday
Showers. High near 75. Chance of precipitation is 80%.
Saturday Night
Showers. Low around 54. Chance of precipitation is 80%.
Sunday
A chance of showers. Mostly sunny, with a high near 70. Chance of precipitation is 40%.
Sunday Night
Mostly cloudy, with a low around 48.
Monday
Mostly sunny, with a high near 68.
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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 May 13, 2025
Forecast Valid:
2am EDT May 13, 2025-6pm EDT May 19, 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