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

Dangerous Heat in the Southwest; Severe Thunderstorms from the Central Plains into the Ohio Valley

Dangerous heat will build across the Southwest U.S. through the end of the week with daytime highs of 110-115°F. Isolated to widely scattered severe storms are expected across parts of the central and southern High Plains, Great Lakes into the Ohio Valley, and parts of the Ozarks to Lower Mississippi Valley today. Read More >

Current conditions at

Jamestown, Chautauqua County/Jamestown Airport (KJHW)

Lat: 42.15°NLon: 79.27°WElev: 1722ft.

Fair

70°F

21°C

Humidity 68%
Wind Speed S 7 mph
Barometer 30.00 in (1015.6 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 26 Aug 7:56 pm EDT
Extended Forecast for

2 Miles ENE Mayville NY

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly between 4am and 5am. Increasing clouds, with a low around 60. South wind 6 to 8 mph. Chance of precipitation is 30%.

    Low: 60 °F

    Mostly Clear
    then Chance
    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms, mainly between 11am and 3pm. Mostly cloudy, then gradually becoming sunny, with a high near 76. South wind 10 to 14 mph becoming west in the afternoon. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers, mainly between 11pm and 2am. Increasing clouds, with a low around 58. West wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 58 °F

    Chance
    Showers

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 72. North wind 3 to 7 mph.

    High: 72 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly clear, with a low around 52. Calm wind.

    Low: 52 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 75. Calm wind becoming west around 5 mph in the afternoon.

    High: 75 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 57. Calm wind becoming south around 5 mph after midnight.

    Low: 57 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 79. Southwest wind 6 to 8 mph.

    High: 79 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A chance of showers after 2am. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.

    Low: 65 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
A chance of showers and thunderstorms, mainly between 4am and 5am. Increasing clouds, with a low around 60. South wind 6 to 8 mph. Chance of precipitation is 30%.
Thursday
A chance of showers and thunderstorms, mainly between 11am and 3pm. Mostly cloudy, then gradually becoming sunny, with a high near 76. South wind 10 to 14 mph becoming west in the afternoon. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A chance of showers, mainly between 11pm and 2am. Increasing clouds, with a low around 58. West wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 72. North wind 3 to 7 mph.
Friday Night
Mostly clear, with a low around 52. Calm wind.
Saturday
Sunny, with a high near 75. Calm wind becoming west around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 57. Calm wind becoming south around 5 mph after midnight.
Sunday
Mostly sunny, with a high near 79. Southwest wind 6 to 8 mph.
Sunday Night
A chance of showers after 2am. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.
Monday
A chance of showers before 8am. Partly sunny, with a high near 81. Chance of precipitation is 30%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 67. Chance of precipitation is 30%.
Tuesday
A chance of showers. Partly sunny, with a high near 82. Chance of precipitation is 30%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 66. Chance of precipitation is 50%.
Wednesday
A chance of showers. Partly sunny, with a high near 80. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Mayville NY
 42.26°N 79.47°W (Elev. 1348 ft)
Last Update:
7:57 pm EDT Aug 26, 2026
Forecast Valid:
8pm EDT Aug 26, 2026-6pm EDT Sep 2, 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