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

Dangerous Heat in the East; Critical Fire Weather in the Southwest

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Heat is likely to continue across the eastern U.S. through the Independence Day holiday weekend. Critical fire weather conditions will continue today and likely Tuesday across portions of the Four Corners and northern High Plains. Read More >

Hazardous Weather Conditions

Current conditions at

Jamestown, Chautauqua County/Jamestown Airport (KJHW)

Lat: 42.15°NLon: 79.27°WElev: 1722ft.

A Few Clouds

82°F

28°C

Humidity 55%
Wind Speed SW 3 mph
Barometer 30.14 in (1020.0 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 29 Jun 4:56 pm EDT
Extended Forecast for

2 Miles SSW Sherman NY

Heat Advisory June 30, 12:00pm until June 30, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: Partly cloudy, with a low around 69. Calm wind becoming south 5 to 7 mph after midnight.

    Low: 69 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 89. Heat index values as high as 96. South wind 8 to 11 mph.

    High: 89 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 74. Southwest wind 5 to 8 mph.

    Low: 74 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny and hot, with a high near 90. Heat index values as high as 97. West wind 7 to 10 mph.

    High: 90 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 72. Southwest wind around 6 mph.

    Low: 72 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 91. West wind 5 to 10 mph.

    High: 91 °F

    Hot

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 71. Southwest wind around 6 mph.

    Low: 71 °F

    Partly Cloudy

  • Friday

    Friday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. West wind 5 to 9 mph. Chance of precipitation is 40%.

    High: 88 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 50%.

    Low: 68 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 69. Calm wind becoming south 5 to 7 mph after midnight.
Tuesday
Mostly sunny, with a high near 89. Heat index values as high as 96. South wind 8 to 11 mph.
Tuesday Night
Partly cloudy, with a low around 74. Southwest wind 5 to 8 mph.
Wednesday
Sunny and hot, with a high near 90. Heat index values as high as 97. West wind 7 to 10 mph.
Wednesday Night
Mostly clear, with a low around 72. Southwest wind around 6 mph.
Thursday
Sunny and hot, with a high near 91. West wind 5 to 10 mph.
Thursday Night
Partly cloudy, with a low around 71. Southwest wind around 6 mph.
Friday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. West wind 5 to 9 mph. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 50%.
Independence Day
Showers likely, with thunderstorms also possible after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 60%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 50%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW Sherman NY
 42.12°N 79.61°W (Elev. 1535 ft)
Last Update:
3:57 pm EDT Jun 29, 2026
Forecast Valid:
5pm EDT Jun 29, 2026-6pm EDT Jul 6, 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