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

Areas of Dangerous Heat and Severe Thunderstorms

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week before returning over much of the Plains into next week. Scattered strong to severe thunderstorms are possible across parts of the Northeast U.S. on Thursday. Damaging wind, hail, and a tornado or two are possible. Read More >

Current conditions at

Cattaraugus County-Olean Airport (KOLE)

Lat: 42.24°NLon: 78.37°WElev: 2135ft.

Fair

63°F

17°C

Humidity 77%
Wind Speed S 3 mph
Barometer 30.00 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 26 Aug 11:55 pm EDT
Extended Forecast for

Delevan NY

  • Overnight

    Overnight: Increasing clouds, with a low around 60. South wind 3 to 5 mph.

    Low: 60 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 3pm, then a chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 76. South wind around 8 mph becoming west in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 57. West wind around 5 mph becoming calm in the evening.

    Low: 57 °F

    Increasing
    Clouds

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 72. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 72 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly clear, with a low around 50. Calm wind.

    Low: 50 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 75. Calm wind.

    High: 75 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 56. Calm wind.

    Low: 56 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 78. Southwest wind 3 to 5 mph.

    High: 78 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A chance of showers. Mostly cloudy, with a low around 64. Chance of precipitation is 30%.

    Low: 64 °F

    Chance
    Showers

Detailed Forecast

Overnight
Increasing clouds, with a low around 60. South wind 3 to 5 mph.
Thursday
A chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 3pm, then a chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 76. South wind around 8 mph becoming west in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Increasing clouds, with a low around 57. West wind around 5 mph becoming calm in the evening.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 72. Calm wind becoming northwest around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 50. Calm wind.
Saturday
Sunny, with a high near 75. Calm wind.
Saturday Night
Partly cloudy, with a low around 56. Calm wind.
Sunday
Mostly sunny, with a high near 78. Southwest wind 3 to 5 mph.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 64. Chance of precipitation is 30%.
Monday
Partly sunny, with a high near 81.
Monday Night
A chance of showers. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.
Tuesday
A chance of showers. Partly sunny, with a high near 82. Chance of precipitation is 40%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.
Wednesday
A chance of showers. Partly sunny, with a high near 80. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Delevan NY
 42.48°N 78.49°W (Elev. 1476 ft)
Last Update:
9:57 pm EDT Aug 26, 2026
Forecast Valid:
12am EDT Aug 27, 2026-6pm EDT Sep 2, 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