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

Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Critical to extremely critical fire weather conditions are forecast from the Northwest and the northern Great Basin this weekend. Particularly Dangerous Situation Red Flag Warnings have been issued. Read More >

Hazardous Weather Conditions

Current conditions at

Cattaraugus County-Olean Airport (KOLE)

Lat: 42.24°NLon: 78.37°WElev: 2135ft.

Overcast

68°F

20°C

Humidity 73%
Wind Speed Calm
Barometer 29.90 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 2 Aug 1:55 am EDT
Extended Forecast for

Great Valley NY

  • Overnight

    Overnight: A chance of showers, with thunderstorms also possible after 5am. Cloudy, with a low around 63. Southeast wind around 6 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 63 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8am. High near 72. Southeast wind 5 to 9 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 72 °F

    Showers

  • Sunday Night

    Sunday Night: Showers and thunderstorms before 2am, then a chance of showers. Low around 60. Light and variable wind. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 60 °F

    Showers then
    Showers
    Likely

  • Monday

    Monday: Partly sunny, with a high near 73. North wind 3 to 7 mph.

    High: 73 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 54. Light northeast wind.

    Low: 54 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 79. Calm wind.

    High: 79 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 59. Calm wind.

    Low: 59 °F

    Mostly Clear

  • Wednesday

    Wednesday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 80. Light south wind. Chance of precipitation is 60%.

    High: 80 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 61. Chance of precipitation is 60%.

    Low: 61 °F

    Showers
    Likely then
    Chance
    T-storms

Detailed Forecast

Overnight
A chance of showers, with thunderstorms also possible after 5am. Cloudy, with a low around 63. Southeast wind around 6 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8am. High near 72. Southeast wind 5 to 9 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Showers and thunderstorms before 2am, then a chance of showers. Low around 60. Light and variable wind. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Monday
Partly sunny, with a high near 73. North wind 3 to 7 mph.
Monday Night
Partly cloudy, with a low around 54. Light northeast wind.
Tuesday
Sunny, with a high near 79. Calm wind.
Tuesday Night
Mostly clear, with a low around 59. Calm wind.
Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 80. Light south wind. Chance of precipitation is 60%.
Wednesday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 61. Chance of precipitation is 60%.
Thursday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 80. Chance of precipitation is 40%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Chance of precipitation is 40%.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 79. Chance of precipitation is 60%.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 61. Chance of precipitation is 60%.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 79. Chance of precipitation is 40%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Great Valley NY
 42.23°N 78.59°W (Elev. 1877 ft)
Last Update:
1:57 am EDT Aug 2, 2026
Forecast Valid:
2am EDT Aug 2, 2026-6pm EDT Aug 8, 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