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

Niagara Falls, Niagara Falls International Airport (KIAG)

Lat: 43.11°NLon: 78.94°WElev: 587ft.

Fair

83°F

28°C

Humidity 41%
Wind Speed SW 7 mph
Barometer 29.94 in (1013.3 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 31 Jul 5:53 pm EDT
Extended Forecast for

Lewiston NY

  • Tonight

    Tonight: Mostly cloudy, with a low around 67. South wind 5 to 7 mph.

    Low: 67 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 84. South wind 3 to 5 mph.

    High: 84 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A slight chance of showers before 9pm, then a chance of showers and thunderstorms between 9pm and 2am, then showers and possibly a thunderstorm after 2am. Low around 66. East wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 66 °F

    Chance
    Showers then
    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 77. Southeast wind 5 to 8 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 77 °F

    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm. Low around 64. South wind around 6 mph becoming northeast after midnight. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 64 °F

    Showers

  • Monday

    Monday: Showers likely and possibly a thunderstorm before 8am, then a chance of showers and thunderstorms, mainly between 8am and 2pm. Partly sunny, with a high near 77. North wind 7 to 9 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 77 °F

    Showers
    Likely

  • Monday Night

    Monday Night: Partly cloudy, with a low around 62. Northeast wind around 5 mph.

    Low: 62 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 80. Northeast wind 6 to 8 mph.

    High: 80 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 67. South wind 5 to 7 mph.
Saturday
Mostly cloudy, with a high near 84. South wind 3 to 5 mph.
Saturday Night
A slight chance of showers before 9pm, then a chance of showers and thunderstorms between 9pm and 2am, then showers and possibly a thunderstorm after 2am. Low around 66. East wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers and possibly a thunderstorm. High near 77. Southeast wind 5 to 8 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. Low around 64. South wind around 6 mph becoming northeast after midnight. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Showers likely and possibly a thunderstorm before 8am, then a chance of showers and thunderstorms, mainly between 8am and 2pm. Partly sunny, with a high near 77. North wind 7 to 9 mph. Chance of precipitation is 60%. 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 62. Northeast wind around 5 mph.
Tuesday
Mostly sunny, with a high near 80. Northeast wind 6 to 8 mph.
Tuesday Night
Partly cloudy, with a low around 64.
Wednesday
A chance of showers. Partly sunny, with a high near 81. Chance of precipitation is 40%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.
Thursday
A chance of showers. Mostly sunny, with a high near 81. Chance of precipitation is 30%.
Thursday Night
A chance of showers. Partly cloudy, with a low around 65. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 81.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lewiston NY
 43.16°N 79.03°W (Elev. 548 ft)
Last Update:
3:57 pm EDT Jul 31, 2026
Forecast Valid:
6pm EDT Jul 31, 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