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

Record Heat for the Intermountain West and Northern Plains; Heavy Rainfall and Severe Weather Threats

Record setting heat is expected over the next several days from the Intermountain West through the northern Plains. Furthermore, fire weather concerns increase with dry and breezy conditions. Meanwhile, heavy rainfall and severe thunderstorm threats for the Ohio/Tennessee Valleys, central Appalachians and Southeast today. The threat shifts to central Gulf Coast and across central Texas this week. Read More >

Current conditions at

Jamestown, Chautauqua County/Jamestown Airport (KJHW)

Lat: 42.15°NLon: 79.27°WElev: 1722ft.

Overcast

73°F

23°C

Humidity 51%
Wind Speed Vrbl 5 mph
Barometer 30.25 in (1024.0 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 12 Jul 10:56 am EDT
Extended Forecast for

Sinclairville NY

  • Today

    Today: Sunny, with a high near 82. Light and variable wind.

    High: 82 °F

    Sunny

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, mostly clear, with a low around 60. Northeast wind around 6 mph becoming calm in the evening.

    Low: 60 °F

    Mostly Clear
    then Patchy
    Fog

  • Monday

    Monday: Patchy fog before 8am. Otherwise, sunny, with a high near 84. South wind around 5 mph becoming west in the afternoon.

    High: 84 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Clear, with a low around 65. Calm wind becoming south around 5 mph after midnight.

    Low: 65 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 89. West wind 6 to 11 mph.

    High: 89 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 71. Southwest wind around 9 mph, with gusts as high as 20 mph.

    Low: 71 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 86. West wind 6 to 10 mph.

    High: 86 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 63. West wind 5 to 7 mph becoming calm after midnight.

    Low: 63 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 82. Light and variable wind.
Tonight
Patchy fog after 3am. Otherwise, mostly clear, with a low around 60. Northeast wind around 6 mph becoming calm in the evening.
Monday
Patchy fog before 8am. Otherwise, sunny, with a high near 84. South wind around 5 mph becoming west in the afternoon.
Monday Night
Clear, with a low around 65. Calm wind becoming south around 5 mph after midnight.
Tuesday
Sunny, with a high near 89. West wind 6 to 11 mph.
Tuesday Night
Mostly clear, with a low around 71. Southwest wind around 9 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 86. West wind 6 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 63. West wind 5 to 7 mph becoming calm after midnight.
Thursday
Mostly sunny, with a high near 83.
Thursday Night
Partly cloudy, with a low around 62.
Friday
Mostly sunny, with a high near 79.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 61. Chance of precipitation is 30%.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sinclairville NY
 42.27°N 79.27°W (Elev. 1371 ft)
Last Update:
9:57 am EDT Jul 12, 2026
Forecast Valid:
11am EDT Jul 12, 2026-6pm EDT Jul 18, 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