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

Excessive Rainfall and Significant Flooding in the Upper Midwest This Weekend

Heavy to excessive rainfall is expected over the weekend across eastern Iowa, northern Missouri, northwest Illinois and southern Wisconsin. Numerous flash floods, some with significant impacts, are expected in these areas. Heaviest rainfall will occur overnight Saturday and Sunday, so be sure to have multiple ways to receive warnings. Read More >

Current conditions at

Jamestown, Chautauqua County/Jamestown Airport (KJHW)

Lat: 42.15°NLon: 79.27°WElev: 1722ft.

Fair

78°F

26°C

Humidity 56%
Wind Speed S 5 mph
Barometer 30.21 in (1022.5 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 8 Aug 5:56 pm EDT
Extended Forecast for

Jamestown NY

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, mostly clear, with a low around 60. South wind around 6 mph.

    Low: 60 °F

    Mostly Clear
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 9am. Otherwise, sunny, with a high near 86. South wind 3 to 6 mph.

    High: 86 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 61. Light south wind.

    Low: 61 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 88. South wind around 6 mph.

    High: 88 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 61. South wind 3 to 5 mph.

    Low: 61 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 89. Southwest wind around 6 mph.

    High: 89 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 64. South wind 3 to 5 mph.

    Low: 64 °F

    Mostly Clear

  • Tuesday

    Tuesday: A chance of showers after 2pm. Mostly sunny, with a high near 88. Southwest wind 6 to 8 mph. Chance of precipitation is 30%.

    High: 88 °F

    Sunny then
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.

    Low: 65 °F

    Chance
    Showers

Detailed Forecast

Tonight
Patchy fog after 2am. Otherwise, mostly clear, with a low around 60. South wind around 6 mph.
Saturday
Patchy fog before 9am. Otherwise, sunny, with a high near 86. South wind 3 to 6 mph.
Saturday Night
Mostly clear, with a low around 61. Light south wind.
Sunday
Sunny, with a high near 88. South wind around 6 mph.
Sunday Night
Mostly clear, with a low around 61. South wind 3 to 5 mph.
Monday
Sunny, with a high near 89. Southwest wind around 6 mph.
Monday Night
Mostly clear, with a low around 64. South wind 3 to 5 mph.
Tuesday
A chance of showers after 2pm. Mostly sunny, with a high near 88. Southwest wind 6 to 8 mph. Chance of precipitation is 30%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.
Wednesday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 40%.
Wednesday Night
A chance of thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 30%.
Thursday
Partly sunny, with a high near 82.
Thursday Night
Partly cloudy, with a low around 60.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Jamestown NY
 42.09°N 79.24°W (Elev. 1430 ft)
Last Update:
4:37 pm EDT Aug 8, 2025
Forecast Valid:
6pm EDT Aug 8, 2025-6pm EDT Aug 15, 2025
 
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