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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Current conditions at

Jamestown, Chautauqua County/Jamestown Airport (KJHW)

Lat: 42.15°NLon: 79.27°WElev: 1722ft.

Fair

65°F

18°C

Humidity 87%
Wind Speed Calm
Barometer 30.02 in (1016.3 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 27 Aug 8:56 pm EDT
Extended Forecast for

Mayville NY

  • Tonight

    Tonight: A chance of showers, mainly between 11pm and 5am. Partly cloudy, with a low around 58. Light and variable wind. Chance of precipitation is 30%.

    Low: 58 °F

    Chance
    Showers

  • Friday

    Friday: A slight chance of showers before 11am. Mostly sunny, with a high near 71. North wind 3 to 6 mph. Chance of precipitation is 20%.

    High: 71 °F

    Slight Chance
    Showers then
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 53. Calm wind.

    Low: 53 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 75. Light and variable wind.

    High: 75 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 59. Calm wind becoming south around 5 mph after midnight.

    Low: 59 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 80. South wind 6 to 8 mph becoming west in the afternoon.

    High: 80 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A chance of showers. Mostly cloudy, with a low around 65. Calm wind becoming south around 6 mph after midnight. Chance of precipitation is 40%.

    Low: 65 °F

    Chance
    Showers

  • Monday

    Monday: A chance of showers before 2pm. Mostly cloudy, with a high near 81. Southwest wind 7 to 9 mph. Chance of precipitation is 30%.

    High: 81 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.

    Low: 68 °F

    Chance
    T-storms

Detailed Forecast

Tonight
A chance of showers, mainly between 11pm and 5am. Partly cloudy, with a low around 58. Light and variable wind. Chance of precipitation is 30%.
Friday
A slight chance of showers before 11am. Mostly sunny, with a high near 71. North wind 3 to 6 mph. Chance of precipitation is 20%.
Friday Night
Mostly clear, with a low around 53. Calm wind.
Saturday
Mostly sunny, with a high near 75. Light and variable wind.
Saturday Night
Partly cloudy, with a low around 59. Calm wind becoming south around 5 mph after midnight.
Sunday
Mostly sunny, with a high near 80. South wind 6 to 8 mph becoming west in the afternoon.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 65. Calm wind becoming south around 6 mph after midnight. Chance of precipitation is 40%.
Monday
A chance of showers before 2pm. Mostly cloudy, with a high near 81. Southwest wind 7 to 9 mph. Chance of precipitation is 30%.
Monday Night
A chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.
Tuesday
Partly sunny, with a high near 84.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 50%.
Wednesday
A chance of showers. Partly sunny, with a high near 81. Chance of precipitation is 40%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.
Thursday
A chance of showers. Partly sunny, with a high near 78. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mayville NY
 42.26°N 79.5°W (Elev. 1398 ft)
Last Update:
7:57 pm EDT Aug 27, 2026
Forecast Valid:
9pm EDT Aug 27, 2026-6pm EDT Sep 3, 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