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.

Fog

39°F

4°C

Humidity 100%
Wind Speed Calm
Barometer 29.79 in
Dewpoint 39°F (4°C)
Visibility 0.25 mi
Last update 20 Mar 11:15 pm EDT
Extended Forecast for

4 Miles ENE Great Valley NY

Dense Fog Advisory until March 21, 08:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until March 21, 08:00am

    NOW until 8:00am Sat

    Dense Fog Advisory

  • Tonight

    Low: 31 °F

    Dense Fog

  • Saturday

    Saturday: Patchy fog before 9am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 49. North wind around 5 mph becoming calm in the morning.

    High: 49 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 40. Calm wind becoming south around 6 mph after midnight.

    Low: 40 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 59. Southwest wind around 7 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 59 °F

    Chance
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Rain showers likely before 2am, then a chance of rain and snow showers. Cloudy, with a low around 27. North wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 27 °F

    Showers
    Likely then
    Rain/Snow
    Likely

  • Monday

    Monday: A chance of snow showers, mainly before 8am. Mostly cloudy, with a high near 34. Northwest wind around 8 mph. Chance of precipitation is 30%.

    High: 34 °F

    Chance Snow
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 20. Northwest wind 5 to 7 mph.

    Low: 20 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 42. Southwest wind 3 to 7 mph.

    High: 42 °F

    Mostly Sunny

Detailed Forecast

Tonight
Widespread dense fog. Otherwise, cloudy, with a low around 31. Northwest wind 5 to 8 mph.
Saturday
Patchy fog before 9am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 49. North wind around 5 mph becoming calm in the morning.
Saturday Night
Mostly cloudy, with a low around 40. Calm wind becoming south around 6 mph after midnight.
Sunday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 59. Southwest wind around 7 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Rain showers likely before 2am, then a chance of rain and snow showers. Cloudy, with a low around 27. North wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
A chance of snow showers, mainly before 8am. Mostly cloudy, with a high near 34. Northwest wind around 8 mph. Chance of precipitation is 30%.
Monday Night
Partly cloudy, with a low around 20. Northwest wind 5 to 7 mph.
Tuesday
Mostly sunny, with a high near 42. Southwest wind 3 to 7 mph.
Tuesday Night
A chance of snow showers. Mostly cloudy, with a low around 26. Chance of precipitation is 40%.
Wednesday
Mostly cloudy, with a high near 38.
Wednesday Night
Mostly cloudy, with a low around 22.
Thursday
A chance of showers. Partly sunny, with a high near 54. Chance of precipitation is 40%.
Thursday Night
Rain and snow showers. Low around 26. Chance of precipitation is 80%.
Friday
Rain and snow showers likely. Mostly cloudy, with a high near 36. Chance of precipitation is 60%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ENE Great Valley NY
 42.24°N 78.53°W (Elev. 2100 ft)
Last Update:
9:58 pm EDT Mar 20, 2026
Forecast Valid:
11pm EDT Mar 20, 2026-6pm EDT Mar 27, 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