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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Current conditions at

Niagara Falls, Niagara Falls International Airport (KIAG)

Lat: 43.11°NLon: 78.94°WElev: 587ft.

A Few Clouds

68°F

20°C

Humidity 81%
Wind Speed NW 7 mph
Barometer 29.93 in (1013.3 mb)
Dewpoint 62°F (17°C)
Visibility 9.00 mi
Last update 27 Aug 8:53 pm EDT
Extended Forecast for

Lewiston NY

  • Tonight

    Tonight: Mostly clear, with a low around 60. Northwest wind 3 to 6 mph.

    Low: 60 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 73. North wind 5 to 7 mph.

    High: 73 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 57. Calm wind.

    Low: 57 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 77. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 77 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 64. South wind around 6 mph.

    Low: 64 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 81. Southwest wind 6 to 9 mph.

    High: 81 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 67. South wind around 6 mph. Chance of precipitation is 70%.

    Low: 67 °F

    Chance
    T-storms then
    Showers
    Likely

  • Monday

    Monday: Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 81. Southwest wind 6 to 9 mph. Chance of precipitation is 60%.

    High: 81 °F

    Showers
    Likely

  • Monday Night

    Monday 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 then
    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 60. Northwest wind 3 to 6 mph.
Friday
Mostly sunny, with a high near 73. North wind 5 to 7 mph.
Friday Night
Mostly clear, with a low around 57. Calm wind.
Saturday
Sunny, with a high near 77. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 64. South wind around 6 mph.
Sunday
Partly sunny, with a high near 81. Southwest wind 6 to 9 mph.
Sunday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 67. South wind around 6 mph. Chance of precipitation is 70%.
Monday
Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 81. Southwest wind 6 to 9 mph. Chance of precipitation is 60%.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 50%.
Tuesday
A chance of showers. Mostly cloudy, with a high near 83. Chance of precipitation is 40%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 68. Chance of precipitation is 50%.
Wednesday
A chance of showers. Partly sunny, with a high near 82. Chance of precipitation is 30%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.
Thursday
Partly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lewiston NY
 43.19°N 79.06°W (Elev. 295 ft)
Last Update:
7:57 pm EDT Aug 27, 2026
Forecast Valid:
9pm EDT Aug 27, 2026-6pm EDT Sep 3, 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