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

Air Quality Concerns; Fire Weather; Extreme Heat; Flash Flooding

Wildfire smoke continues to result in poor air quality from the Upper Midwest into the Northeast. Dangerous heat and fire weather concerns for portions of the Four Corners region into the central Great Basin. Heavy rainfall and flash flooding possible for the Southeast through Monday. For Hawaii, gusty trade winds a drier weather could result in any fires that start to spread rapidly. Read More >

Hazardous Weather Conditions

Current conditions at

Cattaraugus County-Olean Airport (KOLE)

Lat: 42.24°NLon: 78.37°WElev: 2135ft.

Fair

59°F

15°C

Humidity 82%
Wind Speed Calm
Barometer 30.22 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 4 Aug 1:55 am EDT
Extended Forecast for

Delevan NY

  • Overnight

    Overnight: Widespread haze. Mostly clear, with a low around 54. Calm wind.

    Low: 54 °F

    Haze

  • Monday

    Monday: Widespread haze. Sunny, with a high near 82. Calm wind becoming northeast around 6 mph in the afternoon.

    High: 82 °F

    Haze

  • Monday Night

    Monday Night: Widespread haze before midnight. Mostly cloudy, with a low around 57. Light and variable wind becoming southeast around 6 mph after midnight.

    Low: 57 °F

    Haze then
    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 83. Southeast wind around 5 mph becoming calm in the morning.

    High: 83 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 61. Calm wind.

    Low: 61 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 81. Light southeast wind. Chance of precipitation is 20%.

    High: 81 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 59. Light south wind.

    Low: 59 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 81. South wind 3 to 5 mph.

    High: 81 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

Detailed Forecast

Overnight
Widespread haze. Mostly clear, with a low around 54. Calm wind.
Monday
Widespread haze. Sunny, with a high near 82. Calm wind becoming northeast around 6 mph in the afternoon.
Monday Night
Widespread haze before midnight. Mostly cloudy, with a low around 57. Light and variable wind becoming southeast around 6 mph after midnight.
Tuesday
Partly sunny, with a high near 83. Southeast wind around 5 mph becoming calm in the morning.
Tuesday Night
Mostly cloudy, with a low around 61. Calm wind.
Wednesday
A slight chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 81. Light southeast wind. Chance of precipitation is 20%.
Wednesday Night
Partly cloudy, with a low around 59. Light south wind.
Thursday
Mostly sunny, with a high near 81. South wind 3 to 5 mph.
Thursday Night
Mostly clear, with a low around 60.
Friday
Sunny, with a high near 82.
Friday Night
Mostly clear, with a low around 61.
Saturday
Sunny, with a high near 85.
Saturday Night
Partly cloudy, with a low around 63.
Sunday
Mostly sunny, with a high near 86.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Delevan NY
 42.48°N 78.49°W (Elev. 1476 ft)
Last Update:
1:36 am EDT Aug 4, 2025
Forecast Valid:
2am EDT Aug 4, 2025-6pm EDT Aug 10, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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