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

Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Critical to extremely critical fire weather conditions are forecast from the Northwest and the northern Great Basin this weekend. Particularly Dangerous Situation Red Flag Warnings have been issued. Read More >

Hazardous Weather Conditions

Current conditions at

Jamestown, Chautauqua County/Jamestown Airport (KJHW)

Lat: 42.15°NLon: 79.27°WElev: 1722ft.

Fair

71°F

22°C

Humidity 76%
Wind Speed SE 6 mph
Barometer 29.95 in (1013.4 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 1 Aug 10:56 am EDT
Extended Forecast for

Mayville NY

  • Today

    Today: Mostly cloudy, with a high near 83. Southeast wind 6 to 8 mph.

    High: 83 °F

    Mostly Cloudy

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3am. Low around 65. Southeast wind 5 to 7 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 65 °F

    Chance
    Showers then
    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 76. South wind 8 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 76 °F

    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm, mainly before 2am, then a chance of showers and thunderstorms after 2am. Low around 63. Southeast wind 5 to 7 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 63 °F

    Showers

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 77. North wind 6 to 9 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 77 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 61. East wind around 6 mph.

    Low: 61 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 81. East wind around 6 mph. Chance of precipitation is 40%.

    High: 81 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 64. South wind around 5 mph. Chance of precipitation is 30%.

    Low: 64 °F

    Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 81. Chance of precipitation is 60%.

    High: 81 °F

    Showers
    Likely

Detailed Forecast

Today
Mostly cloudy, with a high near 83. Southeast wind 6 to 8 mph.
Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3am. Low around 65. Southeast wind 5 to 7 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers and possibly a thunderstorm. High near 76. South wind 8 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday Night
Showers and possibly a thunderstorm, mainly before 2am, then a chance of showers and thunderstorms after 2am. Low around 63. Southeast wind 5 to 7 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Monday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 77. North wind 6 to 9 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday Night
Partly cloudy, with a low around 61. East wind around 6 mph.
Tuesday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 81. East wind around 6 mph. Chance of precipitation is 40%.
Tuesday Night
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 64. South wind around 5 mph. Chance of precipitation is 30%.
Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 81. Chance of precipitation is 60%.
Wednesday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.
Thursday
A chance of showers. Partly sunny, with a high near 81. Chance of precipitation is 30%.
Thursday Night
A chance of showers. Partly cloudy, with a low around 64. Chance of precipitation is 30%.
Friday
A chance of showers. Partly sunny, with a high near 80. Chance of precipitation is 40%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mayville NY
 42.24°N 79.51°W (Elev. 1365 ft)
Last Update:
9:58 am EDT Aug 1, 2026
Forecast Valid:
11am EDT Aug 1, 2026-6pm EDT Aug 7, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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