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

Hazardous Weather Conditions

Current conditions at

Cattaraugus County-Olean Airport (KOLE)

Lat: 42.24°NLon: 78.37°WElev: 2135ft.

Light Rain

64°F

18°C

Humidity 83%
Wind Speed W 5 mph
Barometer 30.12 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 19 May 4:35 am EDT
Extended Forecast for

Delevan NY

  • Overnight

    Overnight: A chance of showers. Mostly cloudy, with a low around 69. Southwest wind around 7 mph. Chance of precipitation is 40%.

    Low: 69 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, mainly between 2pm and 5pm. Partly sunny, with a high near 84. Southwest wind 9 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms, mainly before 2am, then showers likely and possibly a thunderstorm after 4am. Low around 55. Southwest wind 6 to 8 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 55 °F

    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before 8am, then a slight chance of showers between 8am and 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 64. Northwest wind around 7 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 64 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 39. Light north wind.

    Low: 39 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 59. Northeast wind around 5 mph.

    High: 59 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 42. Light east wind.

    Low: 42 °F

    Partly Cloudy

  • Friday

    Friday: A chance of showers after 2pm. Mostly cloudy, with a high near 64. East wind around 7 mph. Chance of precipitation is 40%.

    High: 64 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday Night

    Friday Night: Showers, mainly after 8pm. Low around 47. Chance of precipitation is 80%.

    Low: 47 °F

    Showers

Detailed Forecast

Overnight
A chance of showers. Mostly cloudy, with a low around 69. Southwest wind around 7 mph. Chance of precipitation is 40%.
Tuesday
A chance of showers and thunderstorms, mainly between 2pm and 5pm. Partly sunny, with a high near 84. Southwest wind 9 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Showers and thunderstorms, mainly before 2am, then showers likely and possibly a thunderstorm after 4am. Low around 55. Southwest wind 6 to 8 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
A chance of showers and thunderstorms before 8am, then a slight chance of showers between 8am and 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 64. Northwest wind around 7 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Partly cloudy, with a low around 39. Light north wind.
Thursday
Mostly sunny, with a high near 59. Northeast wind around 5 mph.
Thursday Night
Partly cloudy, with a low around 42. Light east wind.
Friday
A chance of showers after 2pm. Mostly cloudy, with a high near 64. East wind around 7 mph. Chance of precipitation is 40%.
Friday Night
Showers, mainly after 8pm. Low around 47. Chance of precipitation is 80%.
Saturday
Showers, with thunderstorms also possible after 2pm. High near 61. Chance of precipitation is 80%.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 50. Chance of precipitation is 60%.
Sunday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 67. Chance of precipitation is 40%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 52. Chance of precipitation is 30%.
Memorial Day
Partly sunny, with a high near 72.
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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:
3:57 am EDT May 19, 2026
Forecast Valid:
4am EDT May 19, 2026-6pm EDT May 25, 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