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

Areas of Heavy to Excessive Rainfall and Hot Temperatures This Week

Heavy to excessive rainfall could bring areas of flooding at times Monday through Thursday across parts of the central Plains into the Midwest as well as southern Arizona and New Mexico. Hot temperatures and high humidity will continue across much of east Texas into the lower and mid-Mississippi Valley through at least midweek. Read More >

Hazardous Weather Conditions

Current conditions at

Cattaraugus County-Olean Airport (KOLE)

Lat: 42.24°NLon: 78.37°WElev: 2135ft.

Partly Cloudy

55°F

13°C

Humidity 72%
Wind Speed NA
Barometer 30.08 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 14 Sep 1:15 am EDT
Extended Forecast for

Delevan NY

  • Overnight

    Overnight: A slight chance of showers before 2am. Mostly cloudy, with a low around 50. Northwest wind around 8 mph. Chance of precipitation is 20%.

    Low: 50 °F

    Slight Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 64. North wind 6 to 9 mph.

    High: 64 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 43. Light and variable wind.

    Low: 43 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 73. South wind 6 to 8 mph.

    High: 73 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers after 2am. Partly cloudy, with a low around 60. South wind 5 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    Low: 60 °F

    Partly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 75. Light and variable wind. Chance of precipitation is 30%.

    High: 75 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers after 2am. Mostly cloudy, with a low around 61. Calm wind. Chance of precipitation is 30%.

    Low: 61 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: Showers likely, mainly between 8am and 2pm. Mostly cloudy, with a high near 75. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 60%.

    High: 75 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A chance of showers before 2am. Mostly cloudy, with a low around 56. Chance of precipitation is 40%.

    Low: 56 °F

    Chance
    Showers

Detailed Forecast

Overnight
A slight chance of showers before 2am. Mostly cloudy, with a low around 50. Northwest wind around 8 mph. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 64. North wind 6 to 9 mph.
Monday Night
Mostly clear, with a low around 43. Light and variable wind.
Tuesday
Mostly sunny, with a high near 73. South wind 6 to 8 mph.
Tuesday Night
A chance of showers after 2am. Partly cloudy, with a low around 60. South wind 5 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Wednesday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 75. Light and variable wind. Chance of precipitation is 30%.
Wednesday Night
A chance of showers after 2am. Mostly cloudy, with a low around 61. Calm wind. Chance of precipitation is 30%.
Thursday
Showers likely, mainly between 8am and 2pm. Mostly cloudy, with a high near 75. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 60%.
Thursday Night
A chance of showers before 2am. Mostly cloudy, with a low around 56. Chance of precipitation is 40%.
Friday
Mostly sunny, with a high near 71.
Friday Night
Partly cloudy, with a low around 52.
Saturday
A chance of showers. Partly sunny, with a high near 70. Chance of precipitation is 40%.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 53. Chance of precipitation is 40%.
Sunday
A chance of showers. Mostly cloudy, with a high near 68. Chance of precipitation is 40%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Delevan NY
 42.48°N 78.46°W (Elev. 1542 ft)
Last Update:
10:16 pm EDT Sep 13, 2026
Forecast Valid:
1am EDT Sep 14, 2026-6pm EDT Sep 20, 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