Widespread Excessive Heat and Humidity in Midwest to Spread to East Coast

High pressure building across the Central and Eastern U.S. will produce a dangerous combination of heat and humidity. Heat indices from unusually high dewpoints and well above normal temperatures may reach 110 to 115 degrees. In addition, near record warm low temperatures will limit recovery from hot daytime temperatures. Read More >

Hazardous Weather Conditions

Current conditions at

Jamestown, Chautauqua County/Jamestown Airport (KJHW)

Lat: 42.15° N Lon: 79.27° W Elev: 1722 ft.

Mostly Cloudy

79°F

26°C

Humidity	69%
Wind Speed	W 3 mph
Barometer	29.96 in (1013.7 mb)
Dewpoint	68°F (20°C)
Visibility	10.00 mi
Heat Index	81°F (27°C)
Last update	18 Jul 5:56 pm EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Mobile Weather Hourly Weather Forecast

Detailed forecast for

Chautauqua County

Tonight

Partly cloudy with a chance of showers early, then mainly clear. Very warm and muggy with lows ranging from the upper 60s in interior valleys to the lower 70s along the lake erie shore. Light winds, becoming southwest 10 to 15 mph. Chance of rain 30 percent.

Friday

Mostly cloudy with a chance of showers and thunderstorms in the morning, then partly sunny with a chance of showers in the afternoon. Humid with highs ranging from the upper 80s along the lake erie shore to the lower 90s inland. Southwest winds 10 to 15 mph, diminishing to 5 to 10 mph. Chance of rain 50 percent. Heat index values up to 100.

Friday Night

Mostly cloudy. Showers and thunderstorms likely in the evening, then a chance of showers and thunderstorms overnight. Some thunderstorms may produce gusty winds and frequent lightning in the evening. Very warm and muggy with lows in the mid 70s. West winds 5 to 10 mph, becoming southwest 10 to 15 mph. Chance of rain 60 percent.

Saturday

Partly sunny. A chance of showers and thunderstorms in the afternoon. Hot with highs ranging from the upper 80s along the lake erie shore to the lower 90s inland. Southwest winds 10 to 15 mph, becoming west. Chance of rain 40 percent.

Saturday Night

Mostly cloudy with a chance of showers and thunderstorms. Very warm and muggy with lows in the lower 70s. West winds 10 to 15 mph, diminishing to 5 to 10 mph. Chance of rain 50 percent.

Sunday

Partly sunny with a chance of showers and thunderstorms. Highs in the lower 80s. Chance of rain 50 percent.

Sunday Night

Mostly cloudy with a chance of showers and thunderstorms. Lows in the mid 60s. Chance of rain 40 percent.

Monday

Partly sunny with a chance of showers. Highs in the mid 70s. Chance of rain 30 percent.

Monday Night

Partly cloudy. Lows in the upper 50s.

Tuesday

Mostly sunny. Highs in the mid 70s.

Tuesday Night

Mainly clear. Lows in the upper 50s.